CN110685234B - Construction method of corrugated steel pipe culvert - Google Patents
Construction method of corrugated steel pipe culvert Download PDFInfo
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- CN110685234B CN110685234B CN201910915860.0A CN201910915860A CN110685234B CN 110685234 B CN110685234 B CN 110685234B CN 201910915860 A CN201910915860 A CN 201910915860A CN 110685234 B CN110685234 B CN 110685234B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F5/00—Draining the sub-base, i.e. subgrade or ground-work, e.g. embankment of roads or of the ballastway of railways or draining-off road surface or ballastway drainage by trenches, culverts, or conduits or other specially adapted means
- E01F5/005—Culverts ; Head-structures for culverts, or for drainage-conduit outlets in slopes
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Abstract
The invention discloses a construction method of a corrugated steel pipe culvert, which is used for respectively splicing a plurality of spliced sections of the pipe culvert from back to front and comprises the following steps: a1, splicing construction of a rear end splicing section; a2, splicing and constructing the next splicing section; a3, repeating the step A2 for multiple times until the splicing construction process of all the pipe culvert splicing sections on the rear side of the front end connecting section is completed; and A4, splicing and constructing the front end connecting section. The invention has reasonable design, simple construction and good use effect, adopts the prestress reinforcement structure to carry out sectional type integral reinforcement on the spliced corrugated steel pipe culvert, limits the structure and the arrangement position of each prestress rib group in the prestress reinforcement structure, synchronously carries out prestress reinforcement in a sectional type in the splicing process of the pipe culvert splicing sections, and integrally reinforces all the pipe culvert splicing sections in the pipe culvert body through the prestress reinforcement structure, thereby effectively improving the integrity and the stress performance of the constructed and formed pipe gallery and effectively prolonging the durability of the pipe gallery.
Description
Technical Field
The invention belongs to the technical field of pipe culvert construction, and particularly relates to a construction method of a corrugated steel pipe culvert.
Background
The pipe culvert is a culvert with a round pipe structure, the tunnel part comprises round pipes, a base, a waterproof layer and the like, and the round pipes adopted at present are usually reinforced concrete pipes. Wherein, the piping lane is a special pipe culvert. In recent years, the urbanization process of China is accelerated continuously, the comprehensive strength of cities is enhanced continuously, underground spaces of the cities are developed continuously, and the importance of the comprehensive pipe gallery is known more and more by people. The utility tunnel is a structure and an accessory facility which are built under the city and used for accommodating two or more than two types of city engineering pipelines, also called underground city pipeline utility tunnel, namely, a tunnel space is built under the city, various engineering pipelines such as electric power, communication, gas, heat supply, water supply and drainage and the like are integrated, a special access hole, a lifting hole and a monitoring system are arranged, and the utility tunnel is an important infrastructure and a 'lifeline' for guaranteeing the operation of the city, and implements unified planning, design, construction and management. Utility tunnel mainly divide into three types of trunk utility tunnel, branch utility tunnel and cable piping lane. Wherein, trunk utility tunnel indicates the utility tunnel that is used for holding city trunk engineering pipeline and adopts independent subdivision mode to construct, and branch line utility tunnel is the utility tunnel that is used for holding city ration engineering pipeline and adopts single-cabin or two cabin modes to construct, and the cable piping lane adopts the shallow channel mode construction of burying, is equipped with the piping lane that can open the apron but its inner space can not satisfy the normal current requirement of personnel and be used for holding power cable and communication cable.
In the corrugated steel structure piping lane (also called corrugated steel structure pipe culvert), the pipe is whole corrugated steel pipe (the pipe diameter < 3m) or assembles fashioned pipe by polylith deck plate, compares with the cast-in-place pipe culvert of traditional concrete structure and has following advantage: firstly, the construction efficiency is high: the construction method has the advantages that the construction method is processed in a factory in advance and is assembled and formed on site, the construction speed is high, and the construction period can be saved by more than 30%; secondly, the cost is low: the corrugated steel structure is a steel thin shell, the structure is simple, and the construction cost is low; thirdly, the adaptability is strong: when the reinforced concrete structure generates uneven settlement deformation on the foundation, diseases such as cracks and the like are easy to generate; the corrugated steel structure has the capability of adapting to the deformation of the foundation and the foundation, so that the problem of structural damage caused by uneven settlement of the foundation is solved; fourth, standard environmental protection: the corrugated steel structure is designed and produced in a standardized manner in a factory, the structure is simple, the quality is easy to control, the consumption of natural materials such as cement, broken stone and sand is reduced, the environment is protected, and the low-carbon and environment-friendly effects are achieved; fifthly, due to the existence of the corrugations, the section rigidity of the pipe culvert structure is increased. At present, the corrugated steel structure pipe culvert has been widely applied to municipal engineering and highway engineering due to the advantages of large section rigidity, factory processing and forming, simple and convenient field assembly, low manufacturing cost, strong adaptability, standard environmental protection and the like.
However, in the actual use process, the corrugated steel structure pipe culvert has the following defects: firstly, the pipe diameter is small: the pipe diameter is usually not more than 3m, the provided space is limited, and the space requirements of a trunk pipe gallery and a branch pipe gallery with larger size cannot be met; secondly, a simple, convenient and effective splicing method is lacked, the existing longitudinal splicing method of the corrugated steel pipe type structure mainly comprises two methods, the first method is welding, the second method is connecting a flange and a bolt, but the first method is slow in construction speed and high in consumed labor cost, and the second method is fast in construction but does not give full play to the structural characteristics and advantages of the corrugated steel, so that damage and leakage phenomena are easy to occur at the longitudinal connecting part; thirdly, the corrugated steel structure has poor durability and poor stress performance, and especially, the long-distance large-pipe-diameter spliced pipe culvert has poor integrity and poor stress performance, so that a plurality of damaged parts can be inevitably generated, and the later maintenance workload is large.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a construction method of a corrugated steel pipe culvert, which has the advantages of simple steps, reasonable design, simple and convenient construction and good use effect, adopts a prestress reinforcement structure to carry out sectional type integral reinforcement on the spliced corrugated steel pipe culvert, limits the structure and the arrangement position of each prestress rib group in the prestress reinforcement structure, synchronously carries out the prestress reinforcement in a sectional manner in the splicing process of the pipe culvert splicing sections, and integrally reinforces all the pipe culvert splicing sections in a pipe culvert body through the prestress reinforcement structure, can effectively improve the integrity and the stress performance of a constructed and formed pipe gallery, can effectively prolong the durability of the pipe gallery, and is particularly suitable for a long-distance large-diameter spliced pipe gallery.
In order to solve the technical problems, the invention adopts the technical scheme that: a construction method of a corrugated steel pipe culvert is characterized by comprising the following steps: the constructed pipe culvert comprises a base and a corrugated steel pipe culvert supported on the base, wherein the base is a cast-in-place reinforced concrete base; the base and the corrugated steel pipe culvert are arranged along the longitudinal extension direction of the constructed pipe culvert; a soil filling layer is arranged on the outer side of the constructed pipe culvert, and the base and the corrugated steel pipe culvert are both positioned in the soil filling layer;
the corrugated steel pipe culvert comprises a pipe culvert body formed by splicing a plurality of pipe culvert splicing sections and a prestress reinforcing structure arranged on the outer side of the pipe culvert body, wherein the pipe culvert body is horizontally arranged, and the plurality of pipe culvert splicing sections are arranged on the same straight line from back to front along the longitudinal extension direction of the constructed pipe culvert and are all supported on a base; each pipe culvert splicing section is a corrugated steel pipe which is horizontally arranged and has a circular cross section, the pipe diameters of the plurality of pipe culvert splicing sections are the same, each corrugated steel pipe is a straight steel pipe, and the cross section structures and the sizes of all the corrugated steel pipes in the pipe culvert body are the same; one of the plurality of pipe culvert splicing sections positioned at the rearmost side is a rear end splicing section, and one of the plurality of pipe culvert splicing sections positioned at the foremost side is a front end splicing section; the front and rear adjacent pipe culvert splicing sections are connected through an intermediate connecting ring, the front end of the front end splicing section is coaxially provided with a front end connecting ring, the rear end of the rear end splicing section is coaxially provided with a rear end connecting ring, and the intermediate connecting ring, the front end connecting ring and the rear end connecting ring are all circular rings and are all steel connecting rings which are vertically arranged; the three pipe culvert splicing sections positioned at the rear side of the pipe culvert body are respectively a rear end splicing section, a second splicing section and a third splicing section from back to front, and the rear end splicing section is a first splicing section; the steel connecting ring on the front side of each pipe culvert splicing section is a front side connecting ring, and the steel connecting ring on the rear side of each pipe culvert splicing section is a rear side connecting ring;
the prestress reinforcing structure comprises a left prestress reinforcing structure and a right prestress reinforcing structure which are symmetrically arranged, and the two prestress reinforcing structures are symmetrically arranged above the left side and the right side of the base; each prestress reinforcing structure comprises n prestress rib groups which are arranged on the outer side of the pipe culvert body from top to bottom, the n prestress rib groups are identical in structure and are arranged along the longitudinal extension direction of the constructed pipe culvert; each prestressed tendon group consists of three combined prestressed tendons arranged from top to bottom, and all the combined prestressed tendons in the prestressed reinforcement structure are arranged along the circumferential direction; wherein n is a positive integer and the value range of n is 2-5; the prestressed reinforcement structure comprises 2n prestressed tendon groups, and the 2n prestressed tendon groups are distributed along the circumferential direction; the prestress reinforcing structure comprises 6n combined prestressed tendons, and the 6n combined prestressed tendons are distributed along the circumferential direction;
each combined prestressed tendon comprises a plurality of prestressed tendon sections which are arranged from back to front along the longitudinal extension direction of the constructed pipe culvert, each prestressed tendon section is a straight prestressed tendon or prestressed stranded wire, and all prestressed tendon sections in each combined prestressed tendon are uniformly distributed on the same straight line; each prestressed tendon segment is horizontally arranged, the rear end of each prestressed tendon segment is an anchoring end, the front end of each prestressed tendon segment is a tensioning end, and an anchorage device is arranged at each of the front end and the rear end of each prestressed tendon segment; the prestressed tendon section positioned at the rearmost side in each combined prestressed tendon is a rear-end prestressed tendon section;
the rear end of each prestressed tendon section is fixed on the rear connecting ring of one pipe culvert splicing section through one anchorage device, and the prestressed tendon section fixed on the rear connecting ring of each pipe culvert splicing section is the prestressed tendon section fixed at the rear end of the pipe culvert splicing section;
the front end of each prestressed tendon section is arranged on the front connecting ring of one pipe culvert splicing section through one anchorage device, and the prestressed tendon section arranged on the front connecting ring of each pipe culvert splicing section is the prestressed tendon section to be tensioned at the front end of the pipe culvert splicing section;
all the pipe culvert splicing sections except the front end splicing section and the rear end splicing section in the pipe culvert body are middle splicing sections, 2n prestressed tendon sections are uniformly distributed on the outer sides of the front end splicing section and the rear end splicing section, and 2n prestressed tendon sections distributed on the outer sides of the front end splicing section and the rear end splicing section are distributed along the circumferential direction; 4n prestressed tendon sections are uniformly distributed on the outer side of each middle splicing section, and the 4n prestressed tendon sections are distributed along the circumferential direction;
all the prestressed tendon sections in each combined prestressed tendon are straight prestressed tendon sections; the front and rear adjacent two prestressed tendon sections in each combined prestressed tendon are respectively a rear side section and a front side section positioned on the front side of the rear side section, and one pipe culvert splicing section is arranged between an anchorage mounted at the front end of the rear side section and an anchorage mounted at the rear end of the front side section;
the rear end of the rear-end prestressed tendon section of one of the three combined prestressed tendons is fixed on the rear connecting ring of the rear splicing section through an anchorage device, the rear end of the rear-end prestressed tendon section of the other combined prestressed tendon is fixed on the rear connecting ring of the second splicing section through an anchorage device, and the rear end of the rear-end prestressed tendon section of the third combined prestressed tendon is fixed on the rear connecting ring of the third splicing section through an anchorage device;
each flat prestressed tendon section is positioned outside one two-section type spliced pipe gallery, and each two-section type spliced pipe gallery is formed by splicing two pipe culvert splicing sections which are adjacent from front to back; the steel connecting ring positioned on the foremost side of the two-section type splicing pipe gallery is a front mounting ring, and the steel connecting ring positioned on the rearmost side of the two-section type splicing pipe gallery is a rear mounting ring; the anchorage devices installed at the front ends of the straight prestressed tendon sections are uniformly distributed on one front mounting ring, the anchorage devices installed at the rear ends of the straight prestressed tendon sections are uniformly distributed on one rear mounting ring, and each straight prestressed tendon section is connected between the front mounting ring and the rear mounting ring of one two-section type splicing pipe gallery;
all the straight prestressed tendon sections distributed on the same vertical surface in the pipe culvert body form a two-section tensioning prestressed reinforcing group for integrally reinforcing the two-section spliced pipe gallery, and all the anchorage devices distributed on the same steel connecting ring are distributed along the circumferential direction and are all positioned on the same cross section of the pipe culvert body;
when the constructed pipe culvert is constructed, the method comprises the following steps:
step one, base construction: constructing the base from back to front along the longitudinal extension direction of the constructed pipe culvert;
step two, corrugated steel pipe culvert splicing construction: the construction method comprises the following steps of constructing the corrugated steel pipe culvert from back to front on a base formed in the first step of construction along the longitudinal extension direction of the constructed pipe culvert, and respectively splicing and constructing a plurality of pipe culvert splicing sections of the corrugated steel pipe culvert, wherein the construction method comprises the following steps:
step A1, splicing construction of the rear end splicing section: moving the rear end splicing section with the rear end connecting mechanism in place by adopting hoisting equipment, and respectively penetrating 2n prestressed tendon sections fixed at the rear end of the rear end splicing section;
the rear end connecting mechanism comprises a rear end connecting ring arranged at the rear end of the rear end splicing section and 2n anchorage devices arranged on the rear end connecting ring;
when 2n prestressed tendon sections fixed at the rear end of the rear end splicing section are penetrated, the penetrating methods of the 2n prestressed tendon sections are the same; when any one prestressed tendon section fixed at the rear end of the rear end splicing section is penetrated, fixing the rear end of the prestressed tendon section on one anchorage device at the rear end of the rear end splicing section, and arranging the prestressed tendon section along the longitudinal extension direction of the constructed pipe culvert;
step A2, splicing construction of the next splicing section: adopting hoisting equipment to move the next spliced section of the pipe culvert to a proper position, enabling the rear end of the hoisted current spliced section to be tightly attached to the front end of the spliced section on the rear side, and installing an intermediate connecting mechanism at the connecting position between the current spliced section and the spliced section on the rear side; respectively penetrating 2n prestressed tendon sections fixed at the rear ends of the current spliced sections; after 2n prestressed tendon sections are completely penetrated, synchronously tensioning the 2n prestressed tendon sections needing to be tensioned at the front end of the currently spliced section from back to front along the longitudinal extension direction of the constructed pipe culvert;
the current spliced section is a spliced section of the pipe culvert spliced in the step, and the rear spliced section is a spliced section of the pipe culvert which is positioned at the rear side of the current spliced section and is adjacent to the current spliced section; the middle connecting mechanism comprises one middle connecting ring and 4n anchorage devices arranged on the middle connecting ring;
when 2n prestressed tendon sections fixed at the rear end of the current spliced section are respectively penetrated, the penetrating methods of the 2n prestressed tendon sections are the same; when any one prestressed tendon section fixed at the rear end of the current spliced section is penetrated, fixing the rear end of the prestressed tendon section on one anchorage at the rear end of the current spliced section, and arranging the prestressed tendon section along the longitudinal extension direction of the constructed pipe culvert;
before synchronously tensioning 2n prestressed tendon sections needing to be tensioned at the front end of the current spliced section, respectively installing the front ends of the 2n prestressed tendon sections on one anchorage at the front end of the current spliced section;
step A3, repeating the step A2 for multiple times until the splicing construction process of all the pipe culvert splicing sections positioned on the rear side of the front end connecting section in the pipe culvert body is completed;
step A4, splicing construction of the front end connecting section: adopting hoisting equipment to move the front end splicing section with the front end connecting mechanism in place, enabling the rear end of the front end splicing section to be attached to the front end of the adjacent spliced section, and installing the intermediate connecting mechanism at the connecting position between the front end splicing section and the adjacent spliced section; synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the front end splicing section from back to front along the longitudinal extension direction of the constructed pipe culvert, and completing the splicing construction process of the corrugated steel pipe culvert;
the front end connecting mechanism comprises a front end connecting ring arranged at the front end of the front end splicing section and 2n anchorage devices arranged on the front end connecting ring;
the adjacent spliced sections are pipe culvert spliced sections adjacent to the front end connecting ring in the pipe culvert body;
before synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the front end splicing section, respectively installing the front ends of the 2n prestressed tendon sections on one anchorage device at the front end of the front end splicing section;
step three, backfilling soil: and backfilling soil outside the corrugated steel pipe culvert in the second step to obtain a filled soil layer.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: the inner diameter of the corrugated steel pipe is d, wherein the value range of d is phi 30 m-phi 80 m; wave height of the corrugated steel pipe
Wherein D is the outer diameter of the corrugated steel pipe, and the value range of h is 50-150 mm; the wave pitch of the corrugated steel pipe is lambda, and the value range of the lambda is 100-480 mm.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: each steel connecting ring is formed by splicing a plurality of arc-shaped splicing sections, the arc-shaped splicing sections are distributed on the same vertical surface along the circumferential direction, and two adjacent arc-shaped splicing sections are fixedly connected in a welding mode;
before splicing construction of the rear end splicing section in the step A1, welding and fixing a rear end connecting ring at the rear end of the rear end splicing section, and then arranging 2n anchors on the rear end connecting ring to form the rear end connecting mechanism;
before splicing construction of a front end connecting section in the step A4, welding and fixing the front end connecting ring at the front end of the front end splicing section, and then arranging 2n anchors on the front end connecting ring to form the front end connecting mechanism;
when the intermediate connecting mechanism is installed at the connecting position between the current spliced section and the rear-side spliced section in the step A2, splicing a plurality of arc-shaped spliced sections forming an intermediate connecting ring at the connecting position between the current spliced section and the rear-side spliced section to obtain a spliced intermediate connecting ring;
before splicing the arc-shaped splicing sections forming the intermediate connecting ring, respectively fixing 4n anchors on the arc-shaped splicing sections of the intermediate connecting ring; or after the middle connecting ring is assembled and molded, respectively fixing the 4n anchorage devices on the assembled and molded middle connecting ring.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: each intermediate connecting ring is provided with 2n guide seats for guiding the prestressed tendon sections, the 2n guide seats are distributed along the circumferential direction and are all steel support seats, each guide seat is provided with a guide hole for guiding the prestressed tendon sections, and the guide holes are round holes; each guide seat is fixed on the outer side wall of the middle connecting ring;
before splicing the plurality of arc-shaped splicing sections forming the intermediate connecting ring in the step A2, respectively fixing 2n guide bases on the arc-shaped splicing sections of the intermediate connecting ring; or after the middle connecting ring is assembled and molded, respectively fixing the 2n guide seats on the assembled and molded middle connecting ring;
before synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the currently spliced section in the step A2, firstly, enabling each prestressed tendon section to be tensioned at the front end of the currently spliced section to pass through a guide seat at the rear end of the currently spliced section, then, respectively installing the front end of each prestressed tendon section to be tensioned at the front end of the currently spliced section on one anchorage at the front end of the currently spliced section, and enabling each prestressed tendon section to be arranged along the longitudinal extension direction of the constructed pipe gallery.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: the upper surface of the filling layer is a horizontal plane; lanes for vehicles to walk are laid on the fill layer, and the number of the lanes is multiple;
the longitudinal lengths of the plurality of pipe culvert splicing sections in the pipe culvert body are the same;
before splicing construction of the next splicing section in the step A2, according to a formula
Minimum value of tensile force F to the prestressed tendon sectionmDetermining;
in formula (I), FMIs the positive pressure F of each pipe culvert splicing section in the limit stateM＝γ0(γDND+γLNL) A (II); in formula (II), γ0Is the structural main coefficient and gamma of the pipe culvert splicing section0＝1.1，γDIs a constant load partial coefficient and gammaD＝1.2，γLIs a live load polynomial coefficient and gammaL1.4; a is the cross-sectional area of the spliced section of the pipe culvert and the unit of the cross-sectional area is m2；
NDIs the corrugated steel pressure caused by the earth gravity and ND＝0.5(1.0-0.1Cs)AfW，NDHas the unit of kN/m, AfThe soil pressure increase coefficient for considering the arching effect of the structure; w is the gravity of filling soil per linear meter above the splicing section of the pipe culvert and the unit is kN/m, W is gamma.Dh·(H+0.1075DV) Wherein gamma is the weight of the soil filled on the spliced section of the pipe culvert and the unit of gamma is kN/m3，DhIs the effective span of the spliced section of the pipe culvert and has the unit of m, DVThe effective rise of the pipe culvert splicing section is m, and the H is the filling height above the top of the pipe culvert splicing section and is m;
Csthe soil pressure reduction coefficient for considering the backfill property and the structure size
E is the elastic modulus of the corrugated steel plate used in the splicing section of the pipe culvert and the unit is MPa, EsThe modulus of elasticity of the soil filled on the splicing section of the pipe culvert is MPa;
NLcorrugated steel pressure caused by vehicle load and NL＝0.5DhσL，NLThe unit of (a) is kN/m;
σLthe pressure of the vehicle load extending to the vault of the pipe culvert splicing section is expressed by kN/m,
wherein μ is a vehicle impact expansion coefficient and μ ═0.4(1.0-0.5H)；AlThe total axle weight standard value of the vehicle arranged in the span range of the pipe culvert splicing section is kN, the w is the size of the pipe culvert splicing section after diffusion along the width direction of the lane and the unit is m, ltIs the size of the pipe culvert splicing section after diffusion along the length direction of the lane and the unit of the size is m, mfIs a multilane reduction factor;
step A2 is along the longitudinal extension direction of the pipe culvert of being under construction by 2n of need stretch-draw to second concatenation section front end by back forward when the prestressing tendons section is stretched simultaneously, 2n of need stretch-draw of second concatenation section front end prestressing tendons section all the same and every the tensile force of prestressing tendons section is all not less than 2F allm；
When synchronously tensioning the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section from back to front in the longitudinal extension direction of the constructed pipe culvert in the step A4, the tensioning forces of the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are the same, and the tensioning force of each prestressed tendon section is not less than 2Fm；
All the pipe culvert splicing sections except the rear end splicing section, the front end splicing section and the second splicing section in the pipe culvert body are middle splicing sections;
in the step A2, any one of the middle splicing section front end is required to be tensioned 2n ways from back to front along the longitudinal extension direction of the constructed pipe culvert when the prestressed tendon sections are synchronously tensioned, the middle splicing section front end is required to be tensioned 2n ways, the tensioning force of the prestressed tendon sections is the same and each waym。
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: the front end and the rear end of each pipe culvert splicing section are both a wave trough of the corrugated steel pipe, and the front end and the rear end of each pipe culvert splicing section are symmetrically arranged; the front and back is adjacent two the pipe culvert splice section includes the back splice section and is located the back splice section front side and with the preceding splice section that the back splice section is connected, the front end of back splice section with the rear end of preceding splice section is hugged closely, all pipe culvert splice sections connect into a concatenation formula corrugated steel pipe in the pipe culvert body, and adjacent two around the junction between the pipe culvert splice section is a trough position of concatenation formula corrugated steel pipe.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: an outer reinforcing ring is sleeved on the outer side of the joint between the front and rear adjacent pipe culvert splicing sections, the outer reinforcing ring is annular, the cross section of the outer reinforcing ring is arched, the outer reinforcing ring is sleeved on the spliced corrugated steel pipe, and the inner side wall of the outer reinforcing ring is tightly attached to the outer side wall of the spliced corrugated steel pipe; the longitudinal length of the outer reinforcing ring is d1, the value range of d1 is 0.15 lambda-0.3 lambda, wherein lambda is the wave pitch of the corrugated steel pipe;
the outer reinforcing rings are steel rings, each middle connecting ring is sleeved on one outer reinforcing ring and fixedly connected with the outer reinforcing ring, and each middle connecting ring and the outer reinforcing ring fixed by the middle connecting ring are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe;
the rear end of the rear end splicing section is provided with a rear end reinforcing ring, the front end of the front end splicing section is provided with a front end reinforcing ring, and the rear end reinforcing ring and the front end reinforcing ring are identical in structure and size and are symmetrically arranged; the rear end reinforcing ring is sleeved outside the rear end of the spliced corrugated steel pipe, and the front end reinforcing ring is sleeved outside the front end of the spliced corrugated steel pipe; the inner side walls of the rear end reinforcing ring and the front end reinforcing ring are tightly attached to the outer side wall of the spliced corrugated steel pipe at the position where the rear end reinforcing ring and the front end reinforcing ring are located, and the rear end reinforcing ring and the front end reinforcing ring are welded and fixed on the spliced corrugated steel pipe; the rear end reinforcing ring and the front end reinforcing ring are both steel rings and are both circular rings, and the longitudinal length of the rear end reinforcing ring is half of that of the outer reinforcing ring;
the rear end connecting ring is sleeved on the rear end reinforcing ring and fixedly connected with the rear end reinforcing ring, the rear end connecting ring and the rear end reinforcing ring are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe, and the rear end surfaces of the rear end connecting ring and the rear end reinforcing ring are flush with the rear end of the rear end splicing section;
the front end connecting ring is sleeved on the front end reinforcing ring and fixedly connected with the front end reinforcing ring, the front end connecting ring and the front end reinforcing ring are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe, and the front end surfaces of the front end connecting ring and the front end reinforcing ring are flush with the front end of the front end splicing section;
the rear end reinforcing ring, the front end reinforcing ring and the outer reinforcing ring are formed by splicing a plurality of arc-shaped connecting sections, the arc-shaped connecting sections are distributed on the same vertical surface along the circumferential direction, and two adjacent arc-shaped connecting sections are fixedly connected in a welding mode;
in the step A1, before welding and fixing the rear end connecting ring at the rear end of the rear end splicing section, firstly welding and fixing a rear end reinforcing ring at the outer side of the rear end splicing section, and then welding and fixing the rear end connecting ring on the rear end reinforcing ring;
in the step a4, before the front end of the front end splicing section is welded and fixed with the front end connecting ring, the front end reinforcing ring is welded and fixed at the front end of the front end splicing section, and then the front end connecting ring is welded and fixed on the front end reinforcing ring;
before splicing the plurality of arc-shaped splicing sections forming the middle connecting ring in the step A2, splicing the plurality of arc-shaped connecting sections forming the outer reinforcing ring to obtain a spliced outer reinforcing ring; and then splicing a plurality of arc splicing sections forming the middle connecting ring on the outer reinforcing ring.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: an inner reinforcing ring is arranged on the inner side of each steel connecting ring, the inner reinforcing ring is annular and sleeved in the spliced corrugated steel pipe, and the outer side wall of the inner reinforcing ring is tightly attached to the inner side wall of the spliced corrugated steel pipe; the longitudinal length of the inner reinforcing ring is d2, and the value range of d2 is 0.08 lambda-0.2 lambda; each inner reinforcing ring and the steel connecting ring positioned on the outer side of the inner reinforcing ring are coaxially arranged and are uniformly distributed on the same cross section of the spliced corrugated steel pipe;
the inner reinforcing ring is a steel ring, and the inner reinforcing ring and the spliced corrugated steel pipe are welded and fixed into a whole;
after splicing construction of the rear end splicing section in the step A1 is completed, erecting an inner reinforcing ring on the inner side of the rear end splicing section, and supporting the inner reinforcing ring in the rear end splicing section;
step A4, after the front end splicing section with the front end connecting mechanism is moved in place, an inner reinforcing ring is erected on the inner side of the front end splicing section, the inner reinforcing ring is supported in the front end splicing section, and then 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are synchronously tensioned from back to front along the longitudinal extension direction of a constructed pipe culvert;
when the next splicing section is spliced in the step A2, an inner reinforcing ring is erected on the inner side of the front end of the rear-side spliced section, and the inner reinforcing ring is supported in the rear-side spliced section; then, the current spliced section is moved in place by adopting hoisting equipment, the rear end of the hoisted current spliced section is enabled to be tightly attached to the front end of the rear-side spliced section, and the inner reinforcing ring erected in the step is enabled to be supported on the inner side of the joint between the current spliced section and the rear-side spliced section; thereafter, an intermediate connection mechanism is installed at the connection between the currently spliced section and the rear spliced section.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: an annular water stop belt is clamped between the bottom of the outer reinforcing ring and the spliced corrugated steel pipe, and the annular water stop belt is annular;
before the arc-shaped connecting sections forming the outer reinforcing ring are spliced in the step A2, an annular water stop belt is arranged outside the connecting position between the current spliced section and the rear spliced section.
The construction method of the corrugated steel pipe culvert is characterized by comprising the following steps: the position of the anchor device fixed on the middle connecting ring is a longitudinal position to be reinforced, each longitudinal position to be reinforced is provided with a longitudinal reinforcing structure, each longitudinal reinforcing structure and one anchor device are arranged on the same plane, and each longitudinal reinforcing structure is arranged along the longitudinal extension direction of the constructed pipe culvert;
each longitudinal reinforcing structure comprises two longitudinal reinforcing plates symmetrically arranged on the front side and the rear side of the middle connecting ring, each longitudinal reinforcing plate is a straight steel plate, and the bottom of each longitudinal reinforcing plate is fixed on the outer side wall of the outer reinforcing ring; the two longitudinal reinforcing plates in each longitudinal reinforcing structure are uniformly distributed on the same plane and are distributed along the longitudinal extension direction of the constructed pipe culvert; the longitudinal reinforcing structures are arranged along the circumferential direction and positioned on the same cross section of the spliced corrugated steel pipe, and each longitudinal reinforcing structure is vertically arranged with the outer reinforcing ring fixed by the longitudinal reinforcing structure; one side wall of the longitudinal reinforcing plate is a vertical side wall and is fixed on the middle connecting ring, the other side wall of the longitudinal reinforcing plate is supported on the outer side wall of the spliced corrugated steel pipe, and the other side wall of the longitudinal reinforcing plate is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position of the longitudinal reinforcing plate; the upper part of the longitudinal reinforcing plate is a horizontal plane, and the upper part of the longitudinal reinforcing plate is flush with the outer side wall of the fixed middle connecting ring;
the rear end connecting ring is provided with an anchorage device, the position of the anchorage device is a rear end to-be-reinforced position, each rear end to-be-reinforced position is provided with a rear end reinforcing plate, the structure of each rear end reinforcing plate is the same as that of the longitudinal reinforcing plate, each rear end reinforcing plate is a straight steel plate, and the bottom of each rear end reinforcing plate is fixed on the outer side wall of the corresponding rear end reinforcing ring; the rear end reinforcing plate is arranged along the longitudinal extension direction of the constructed pipe culvert; the rear end reinforcing plates are arranged along the circumferential direction on the spliced corrugated steel pipe, and each rear end reinforcing plate is vertically arranged with the rear end reinforcing ring fixed by the rear end reinforcing plate; the rear side wall of the rear end reinforcing ring is a vertical side wall and is fixed on the rear end connecting ring, the front side wall of the rear end reinforcing ring is supported on the outer side wall of the spliced corrugated steel pipe, and the front side wall of the rear end reinforcing ring is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position of the rear end reinforcing ring; the upper part of the rear end reinforcing ring is a horizontal plane, and the upper part of the rear end reinforcing ring is flush with the outer side wall of the fixed rear end connecting ring;
the position of the anchorage device fixed on the front end connecting ring is a front end to-be-reinforced position, a front end reinforcing plate is arranged on each front end to-be-reinforced position, the structures and the sizes of the front end reinforcing plate and the rear end reinforcing plate are the same, the front end reinforcing plate is a straight steel plate, and the bottom of the front end reinforcing plate is fixed on the outer side wall of the front end reinforcing ring; the front end reinforcing plate is arranged along the longitudinal extension direction of the constructed pipe culvert; the front end reinforcing plates are arranged along the circumferential direction, and each front end reinforcing plate is vertically arranged with the front end reinforcing ring fixed by the front end reinforcing plate; the front side wall of the front end reinforcing ring is a vertical side wall and is fixed on the front end connecting ring, the rear side wall of the front end reinforcing ring is supported on the outer side wall of the spliced corrugated steel pipe, and the rear side wall of the front end reinforcing ring is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position of the front end reinforcing ring; the upper portion of the front end reinforcing ring is a horizontal plane and the upper portion of the front end reinforcing ring is flush with the outer side wall of the fixed front end connecting ring.
Compared with the prior art, the invention has the following advantages:
1. the adopted corrugated steel pipe culvert has reasonable structural design, simple and convenient processing, manufacture and on-site assembly and lower investment and construction cost.
2. The adopted prestress processing structure is taken as an external prestress reinforcing structure of the pipe culvert body, and has the following advantages: first, reinforcement: the spliced sections of the pipe culvert in the pipe culvert body are integrally reinforced, so that the integrity and the stress performance of the pipe culvert body can be effectively improved, and the durability of a pipe culvert is correspondingly and effectively prolonged; secondly, unloading: the load acting on the pipe culvert body can be effectively reduced or even eliminated, and the structural stability and the use effect of the pipe culvert body are further ensured; and thirdly, the structural internal force is changed, and the stress performance and the bearing performance of the pipe culvert body are effectively improved. Simultaneously, the prestressing force reinforcement structure is located the pipe culvert body outside, can not cause any harmful effects to the performance of corrugated steel pipe culvert, especially can not influence the adaptability of corrugated steel pipe culvert, corrugated steel pipe culvert has the ability that adapts to ground and basic deformation, avoids the structural failure problem because of the uneven settlement of foundation basis leads to. In addition, the prestress reinforcement structure can effectively exert the advantages of the prestress reinforcement method, fully exert the triple effects of reinforcement, unloading and structural internal force change of the prestress reinforcement method, ensure and promote the full exertion of the advantages and the performance of the corrugated steel pipe culvert, ensure the structural stability and the integrity of the corrugated steel pipe culvert and fully exert the advantages of the corrugated steel pipe culvert.
3. The steel go-between simple structure that adopts, processing is simple and convenient and the input cost is lower, the site operation is simple and convenient, excellent in use effect, the steel go-between can not only satisfy the installation demand of ground tackle in the prestressing force reinforcement structure, and the steel go-between can radially consolidate in the pipe culvert body to its position department, ensure the structural stability of pipe culvert body, through the steel go-between to pipe culvert body front end, pipe culvert body rear end and around these weak regions of junction between two adjacent pipe culvert concatenation sections effectively consolidate. Connect in the middle go-between two adjacent pipe culvert splice sections around to carry out effective connection when two adjacent pipe culvert splice sections carry out effective connection around, can be adjacent two around the junction between the pipe culvert splice section effectively consolidates, can effectively overcome and can be adjacent two around in the pipe culvert body the junction atress between the pipe culvert splice section is weak, yielding scheduling problem. In addition, the steel connecting ring hoop is arranged on the pipe culvert body, when the pipe culvert body is radially reinforced, the actual sleeving is simple and convenient, the position of the sleeved pipe culvert body cannot be fixed, longitudinal displacement cannot occur, and the using effect is stable and reliable.
4. The outer side reinforcing ring is simple in structure, convenient to machine, low in investment cost, simple and convenient to construct on site, good in using effect, and fixed in position in the actual using process, can be tightly plugged with the outer side wall of the spliced corrugated steel pipe while effectively reinforcing the spliced corrugated steel pipe, and has a good anti-leakage effect.
5. The longitudinal force transmission plate is simple in structure, simple and convenient to process, low in investment cost, simple and convenient to construct on site, good in using effect, and can be applied to the front end of the spliced corrugated steel pipe through the longitudinal force transmission plate, the oblique internal acting force at the joint between the splicing corrugated steel pipe rear end and two adjacent pipe culvert splicing sections is dispersed and transmitted to other regions of the spliced corrugated steel pipe, so that the acting force at the joint between the splicing corrugated steel pipe front end, the splicing corrugated steel pipe rear end and two adjacent pipe culvert splicing sections can be effectively reduced, and the structural stability and the using effect of the joint between the splicing corrugated steel pipe front and rear ends and two adjacent pipe culvert splicing sections are further guaranteed.
6. The splicing construction method is simple, reasonable in design, simple and convenient in construction and good in use effect, can simply, conveniently and quickly finish the splicing construction method of the corrugated steel pipe culvert, and can ensure the use effect and the use performance of the constructed and formed corrugated steel pipe culvert.
In conclusion, the invention has the advantages of reasonable design, simple and convenient construction and good use effect, the spliced corrugated steel pipe culvert is integrally reinforced in a sectional mode by adopting the prestress reinforcing structure, the structure and the arrangement position of each prestress rib group in the prestress reinforcing structure are limited, the prestress reinforcing is synchronously reinforced in a sectional mode in the splicing process of the pipe culvert splicing sections, and all the pipe culvert splicing sections in the pipe culvert body are integrally reinforced through the prestress reinforcing structure, so that the integrity and the stress performance of the constructed and formed pipe gallery can be effectively improved, and the durability of the pipe gallery can be effectively prolonged.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a schematic plan view of a pipe culvert according to the present invention.
FIG. 2 is a schematic cross-sectional structure diagram of the rear end of a pipe culvert constructed according to the present invention.
FIG. 3 is a schematic cross-sectional view of the rear end of the second splice section of the present invention.
FIG. 4 is a schematic cross-sectional view of the rear end of the third splice section of the present invention.
FIG. 5 is a schematic cross-sectional view of the rear end of the fourth splice section of the present invention.
FIG. 6 is a schematic cross-sectional view of the rear end of the fifth splice section of the present invention.
FIG. 7 is a schematic view of a longitudinal section of the rear end of a pipe culvert constructed according to the present invention.
FIG. 8 is a schematic longitudinal section structure diagram of the position of an anchor at the joint between two adjacent pipe culvert splicing sections according to the invention.
Figure 9 is a schematic longitudinal section structure diagram of the position of a guide seat on the joint between two adjacent pipe culvert splicing sections in the invention.
Fig. 10 is a schematic diagram of the arrangement positions of the corrugated steel pipe culvert and the fill layer formed by the construction of the invention.
Fig. 11 is a schematic diagram of the arrangement position of the annular water stop at the joint between two adjacent pipe culvert splicing sections in the invention.
FIG. 12 is a flow chart of a splicing construction method of the present invention.
Description of reference numerals:
1-splicing sections of pipe culverts; 2-intermediate connecting ring; 3-rear end connecting ring;
4-combined prestressed tendons; 5, straightening the prestressed tendon sections; 6, an anchorage device;
7-a guide hole; 8-outer reinforcing ring; 9-rear end reinforcing ring;
10-longitudinal reinforcing plates; 11-rear end reinforcing plate; 12-a guide seat;
13-ring water stop; 14-inner reinforcement ring; 15-filling soil;
16-base.
Detailed Description
As shown in fig. 12, a method for constructing a corrugated steel pipe culvert, the constructed pipe culvert comprises a base 16 and the corrugated steel pipe culvert supported on the base 16, wherein the base 16 is a cast-in-place reinforced concrete base; the base 16 and the corrugated steel pipe culvert are arranged along the longitudinal extension direction of the constructed pipe culvert; a soil filling layer 15 is arranged on the outer side of the constructed pipe culvert, and the base 16 and the corrugated steel pipe culvert are both positioned in the soil filling layer 15, which is shown in detail in figure 10; the bottom of the base 16 and the bottom of the soil filling layer 15 are arranged on the same horizontal plane;
with reference to fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 7, fig. 8 and fig. 9, the corrugated steel pipe culvert comprises a pipe culvert body formed by splicing a plurality of pipe culvert splicing sections 1 and a prestressed reinforcement structure arranged on the outer side of the pipe culvert body, the pipe culvert body is horizontally arranged, and the plurality of pipe culvert splicing sections 1 are arranged on the same straight line from back to front along the longitudinal extension direction of the pipe culvert to be constructed; each pipe culvert splicing section 1 is a corrugated steel pipe which is horizontally arranged and has a circular cross section, the pipe diameters of the plurality of pipe culvert splicing sections 1 are the same, each corrugated steel pipe is a straight steel pipe, and the cross section structures and the sizes of all the corrugated steel pipes in the pipe culvert body are the same; one pipe culvert splicing section 1 positioned at the rearmost side in the plurality of pipe culvert splicing sections 1 is a rear end splicing section, and one pipe culvert splicing section 1 positioned at the foremost side in the plurality of pipe culvert splicing sections 1 is a front end splicing section; the front and rear adjacent pipe culvert splicing sections 1 are connected through an intermediate connecting ring 2, the intermediate connecting ring 2 and the pipe culvert body are coaxially arranged, the front end of the front end splicing section is coaxially provided with a front end connecting ring, the rear end of the rear end splicing section is coaxially provided with a rear end connecting ring 3, the intermediate connecting ring 2, the front end connecting ring and the rear end connecting ring 3 are all circular rings, and the three connecting rings are vertically arranged steel connecting rings; the three pipe culvert splicing sections 1 positioned on the rear side of the pipe culvert body are respectively a rear end splicing section, a second splicing section and a third splicing section from back to front, and the rear end splicing section is a first splicing section; the steel connecting ring positioned on the front side of each pipe culvert splicing section 1 is a front side connecting ring, and the steel connecting ring positioned on the rear side of each pipe culvert splicing section 1 is a rear side connecting ring; the five pipe culvert splicing sections 1 positioned on the rear side of the pipe culvert body are respectively the rear end splicing section, the second splicing section, the third splicing section, the fourth splicing section and the fifth splicing section from back to front; a plurality of the pipe culvert splicing sections 1 are supported on a base 16;
the prestress reinforcing structure comprises a left prestress reinforcing structure and a right prestress reinforcing structure which are symmetrically arranged, and the two prestress reinforcing structures are symmetrically arranged above the left side and the right side of the base 16; each prestress reinforcing structure comprises n prestress rib groups which are arranged on the outer side of the pipe culvert body from top to bottom, the n prestress rib groups are identical in structure and are arranged along the longitudinal extension direction of the constructed pipe culvert; each prestressed tendon group consists of three combined prestressed tendons 4 arranged from top to bottom, and all the combined prestressed tendons 4 in the prestressed reinforcement structure are arranged along the circumferential direction; wherein n is a positive integer and the value range of n is 2-5; the prestressed reinforcement structure comprises 2n prestressed tendon groups, and the 2n prestressed tendon groups are distributed along the circumferential direction; the prestress reinforcing structure comprises 6n combined prestressed tendons 4, and 6n combined prestressed tendons 4 distributed along the circumferential direction;
each combined type prestressed tendon 4 comprises a plurality of prestressed tendon sections which are arranged from back to front along the longitudinal extension direction of the constructed pipe culvert, each prestressed tendon section is a straight prestressed tendon or prestressed stranded wire, and all the prestressed tendon sections in each combined type prestressed tendon 4 are uniformly distributed on the same straight line; each prestressed tendon segment is horizontally arranged, the rear end of each prestressed tendon segment is an anchoring end, the front end of each prestressed tendon segment is a tensioning end, and an anchorage device 6 is arranged at each of the front end and the rear end of each prestressed tendon segment; one prestressed tendon section positioned at the rearmost side in each combined prestressed tendon 4 is a rear-end prestressed tendon section;
the rear end of each prestressed tendon section is fixed on the rear connecting ring of one pipe culvert splicing section 1 through one anchorage device 6, and the prestressed tendon section fixed on the rear connecting ring of each pipe culvert splicing section 1 is the prestressed tendon section fixed at the rear end of the pipe culvert splicing section 1;
the front end of each prestressed tendon section is arranged on the front connecting ring of one pipe culvert splicing section 1 through one anchorage device 6, and the prestressed tendon section arranged on the front connecting ring of each pipe culvert splicing section 1 is the prestressed tendon section to be tensioned at the front end of the pipe culvert splicing section 1;
all the pipe culvert splicing sections 1 except the front end splicing section and the rear end splicing section in the pipe culvert body are middle splicing sections, 2n prestressed tendon sections are uniformly distributed on the outer sides of the front end splicing section and the rear end splicing section, and 2n prestressed tendon sections distributed on the outer sides of the front end splicing section and the rear end splicing section are distributed along the circumferential direction; 4n prestressed tendon sections are uniformly distributed on the outer side of each middle splicing section, and the 4n prestressed tendon sections are distributed along the circumferential direction;
all the prestressed tendon sections in each combined prestressed tendon 4 are straight prestressed tendon sections 5; the front and rear adjacent two prestressed tendon sections in each combined prestressed tendon 4 are respectively a rear side section and a front side section positioned on the front side of the rear side section, and one pipe culvert splicing section 1 is arranged between an anchorage 6 installed at the front end of the rear side section and an anchorage 6 installed at the rear end of the front side section; the clear distance between two adjacent pre-stressed tendon sections in the front and back of each combined pre-stressed tendon 4 is the longitudinal length of one pipe culvert splicing section 1;
the rear end of the rear-end prestressed tendon section of one combined prestressed tendon 4 in the three combined prestressed tendons 4 is fixed on the rear-side connecting ring of the rear-end splicing section through an anchorage device 6, the rear end of the rear-end prestressed tendon section of the other combined prestressed tendon 4 is fixed on the rear-side connecting ring of the second splicing section through an anchorage device 6, and the rear end of the rear-end prestressed tendon section of the third combined prestressed tendon 4 is fixed on the rear-side connecting ring of the third splicing section through an anchorage device 6;
each flat prestressed tendon section 5 is positioned outside one two-section type spliced pipe gallery, and each two-section type spliced pipe gallery is formed by splicing two pipe culvert splicing sections 1 adjacent to each other in front and back; the steel connecting ring positioned on the foremost side of the two-section type splicing pipe gallery is a front mounting ring, and the steel connecting ring positioned on the rearmost side of the two-section type splicing pipe gallery is a rear mounting ring; the anchorage devices 6 arranged at the front ends of the straight prestressed tendon sections 5 are uniformly distributed on one front mounting ring, the anchorage devices 6 arranged at the rear ends of the straight prestressed tendon sections 5 are uniformly distributed on one rear mounting ring, and each straight prestressed tendon section 5 is connected between the front mounting ring and the rear mounting ring of one two-section splicing pipe gallery;
all straight prestressing tendons segments 5 that lay on same vertical face in the pipe culvert body constitute one right two segmentation concatenation piping lane carries out two sections stretch-draw prestressing force reinforcement groups that whole was consolidated, lays in same all ground tackle 6 on the steel go-between lay and it all is located along the circumferencial direction on the same cross section of pipe culvert body.
The prestress reinforcing structure is an external prestress reinforcing structure on the outer side of the pipe culvert body. According to the common knowledge in the field, the prestress reinforcing method is a method for reinforcing a structural member or the whole by adopting an externally-added prestress steel pull rod, a prestress rib or a steel brace rod and the like, and is characterized in that partial stress is applied after the prestress is forced by a prestress means, the internal force distribution of an original structure is changed, the stress level of the original structure is reduced, and the stress-strain hysteresis phenomenon peculiar to a general reinforced structure is completely eliminated. The prestress reinforcing method has triple effects of reinforcing, unloading and changing the internal force of the structure, and is suitable for reinforcing a long-span structure and reinforcing a large-scale structure under a high stress strain state, wherein the reinforcing effect cannot be achieved or is not ideal by adopting a common method. The external prestress reinforcing structure of the pipe culvert body, which is adopted by the invention, has the following advantages: first, reinforcement: integrally reinforcing the plurality of pipe culvert splicing sections 1 in the pipe culvert body, the integrity and the stress performance of the pipe culvert body can be effectively improved, and the durability of a pipe culvert is correspondingly and effectively prolonged; secondly, unloading: the load acting on the pipe culvert body can be effectively reduced or even eliminated, and the structural stability and the using effect of the pipe culvert body are further ensured; and thirdly, the structural internal force is changed, and the stress performance and the bearing performance of the pipe culvert body are effectively improved. Simultaneously, the prestressing force reinforcement structure is located the pipe culvert body outside can not cause any harmful effects to the performance of corrugated steel pipe culvert, especially can not influence the adaptability of corrugated steel pipe culvert, corrugated steel pipe culvert has the ability that adapts to ground and basis deformation, avoids the structural failure problem because of the uneven settlement of foundation basis leads to. The prestress reinforcement structure can effectively exert the advantages of the prestress reinforcement method, fully exert the triple effects of reinforcement, unloading and structural internal force change of the prestress reinforcement method, ensure and promote the full exertion of the advantages and the performance of the corrugated steel pipe culvert, ensure the structural stability and the integrity of the corrugated steel pipe culvert and fully exert the advantages of the corrugated steel pipe culvert.
Especially to long distance's big pipe diameter piping lane, through the prestressing force reinforcement structure makes the construction of long distance, big pipe diameter piping lane be called as probably, can effectively enlarge the application scope of corrugated steel pipe culvert, effectively increase the pipe diameter of corrugated steel pipe culvert to can effectively increase the longitudinal length of corrugated steel pipe culvert. And, through the prestressing force reinforcement structure makes the wholeness, the structural stability and the performance of long distance, big pipe diameter piping lane all can effectively be guaranteed.
Meanwhile, the invention limits the structure and the arrangement position of each prestressed tendon group in the prestressed reinforcement structure, each prestressed tendon group comprises three combined prestressed tendons 4, each combined prestressed tendon 4 comprises a plurality of straight prestressed tendon sections 5 arranged on the same horizontal straight line, and the arrangement position of each straight prestressed tendon section 5 in each prestressed tendon group is specifically limited, so that the pipe culvert splicing section 1 can be synchronously prestressed and reinforced in a segmented manner in the splicing process, meanwhile, the straight prestressed tendon sections 5 outside the front and rear adjacent pipe culvert splicing sections 1 are mutually staggered and matched for use, the aim of integrally reinforcing all the pipe culvert splicing sections 1 in the pipe culvert body can be realized, the prestressed reinforcement effect of the corrugated steel pipe culvert can be effectively improved, and each pipe culvert splicing section 1 in the corrugated steel pipe culvert has the segmented prestressed reinforcement effect, and the whole pipe culvert body has the integral reinforcing effect, the reinforcing effect of the prestress reinforcing structure can be fully exerted, and the site construction is simple and convenient.
The corrugationThe inner diameter of the steel pipe is d, wherein the value range of d is phi 30 m-phi 80 m; wave height of the corrugated steel pipe
Wherein D is the outer diameter of the corrugated steel pipe, and the value range of h is 50-150 mm; the wave pitch of the corrugated steel pipe is lambda, and the value range of the lambda is 100-480 mm. The wave pitch refers to the radial distance between two adjacent wave peaks in the corrugated steel pipe, and is also called as the wavelength. During actual processing, the inner diameter d, the outer diameter, the wave height h and the wave distance lambda of the corrugated steel pipe can be correspondingly adjusted according to specific requirements. Wherein, the larger the inner diameter d of the corrugated steel pipe is, the larger the wave height h and the wave distance lambda are.
In the embodiment, the unfolded sheet of the corrugated steel pipe is a rectangular corrugated steel plate, and the thickness of the rectangular corrugated steel plate is 4-10 mm; the longitudinal length of the pipe culvert splicing section 1 is 3-8 m. During actual processing, the plate thickness of the rectangular corrugated steel plate and the longitudinal length of the pipe culvert splicing section 1 can be respectively and correspondingly adjusted according to specific requirements. The larger the inner diameter d of the corrugated steel pipe is, the larger the plate thickness of the rectangular corrugated steel plate is, and the smaller the longitudinal length of the pipe culvert splicing section 1 is.
In this embodiment, each steel connecting ring is formed by splicing a plurality of arc-shaped splicing sections, the plurality of arc-shaped splicing sections are arranged on the same vertical surface along the circumferential direction, and two adjacent arc-shaped splicing sections are fixedly connected in a welding manner.
The arc splicing section is an arc steel plate strip which is vertically arranged. In this embodiment, the cross section of the arc-shaped splicing section is rectangular. During actual processing, the number of the arc splicing sections in the steel connecting ring and the length and the arrangement position of each arc splicing section can be correspondingly adjusted according to specific requirements. Therefore, the steel connecting ring is simple and convenient to process and flexible in processing mode, and the steel connecting ring is simple and convenient to connect with the pipe culvert body.
During the in-service use, the steel connecting ring can not only satisfy 6's of ground tackle installation demand in the prestressing force reinforcement structure, and the steel connecting ring can be to its position department carry out radial reinforcement in the pipe culvert body, ensure the structural stability of pipe culvert body, through the steel connecting ring is right pipe culvert body front end pipe culvert body rear end and adjacent two around and these atress weak areas of junction between the pipe culvert concatenation section 1 effectively consolidate. Connect adjacent two around the middle go-between 2 between the pipe culvert splice section 1 is adjacent two around the pipe culvert splice section 1 carries out effective connection in the time, can be adjacent two around the junction between the pipe culvert splice section 1 effectively consolidates, can effectively overcome can be adjacent two around in the pipe culvert body junction stress between the pipe culvert splice section 1 is weak, yielding scheduling problem. In addition, the steel connecting ring hoop is arranged on the pipe culvert body, when the pipe culvert body is radially reinforced, the actual sleeving is simple and convenient, the position of the sleeved pipe culvert body cannot be fixed, longitudinal displacement cannot occur, and the using effect is stable and reliable.
When the constructed pipe culvert is constructed, the method comprises the following steps:
step one, base construction: constructing the base 16 from back to front along the longitudinal extension direction of the constructed pipe culvert;
step two, corrugated steel pipe culvert splicing construction: splicing construction is respectively carried out on a plurality of pipe culvert splicing sections 1 of the corrugated steel pipe culvert on the base 16 which is constructed and formed in the first step from back to front along the longitudinal extension direction of the constructed pipe culvert, and the method comprises the following steps:
step A1, splicing construction of the rear end splicing section: moving the rear end splicing section with the rear end connecting mechanism in place by adopting hoisting equipment, and respectively penetrating 2n prestressed tendon sections fixed at the rear end of the rear end splicing section;
the rear end connecting mechanism comprises a rear end connecting ring 3 arranged at the rear end of the rear end splicing section and 2n anchorage devices 6 arranged on the rear end connecting ring 3;
when 2n prestressed tendon sections fixed at the rear end of the rear end splicing section are penetrated, the penetrating methods of the 2n prestressed tendon sections are the same; when any one prestressed tendon section fixed at the rear end of the rear end splicing section is penetrated, fixing the rear end of the prestressed tendon section on one anchorage device 6 at the rear end of the rear end splicing section, and arranging the prestressed tendon section along the longitudinal extension direction of the constructed pipe culvert;
step A2, splicing construction of the next splicing section: adopting hoisting equipment to move the next spliced pipe culvert section 1 to a proper position, enabling the rear end of the hoisted current spliced section to be tightly attached to the front end of the spliced section on the rear side, and installing an intermediate connecting mechanism at the connecting position between the current spliced section and the spliced section on the rear side; respectively penetrating 2n prestressed tendon sections fixed at the rear ends of the current spliced sections; after 2n prestressed tendon sections are completely penetrated, synchronously tensioning the 2n prestressed tendon sections needing to be tensioned at the front end of the currently spliced section from back to front along the longitudinal extension direction of the constructed pipe culvert;
the current spliced section is a spliced section 1 of the pipe culvert spliced in the step, and the rear spliced section is a spliced section 1 of the pipe culvert which is positioned at the rear side of the current spliced section and is adjacent to the current spliced section; the intermediate connecting mechanism comprises the intermediate connecting ring 2 and 4n anchorage devices 6 arranged on the intermediate connecting ring 2;
when 2n prestressed tendon sections fixed at the rear end of the current spliced section are respectively penetrated, the penetrating methods of the 2n prestressed tendon sections are the same; when any one prestressed tendon section fixed at the rear end of the current spliced section is penetrated, fixing the rear end of the prestressed tendon section on one anchorage 6 at the rear end of the current spliced section, and arranging the prestressed tendon section along the longitudinal extension direction of the constructed pipe culvert;
before 2n prestressed tendon sections needing to be tensioned at the front end of the current spliced section are synchronously tensioned, respectively installing the front ends of the 2n prestressed tendon sections on one anchorage device 6 at the front end of the current spliced section;
step A3, repeating the step A2 for multiple times until the splicing construction process of all the pipe culvert splicing sections 1 positioned on the rear side of the front end connecting section in the pipe culvert body is completed;
step A4, splicing construction of the front end connecting section: adopting hoisting equipment to move the front end splicing section with the front end connecting mechanism in place, enabling the rear end of the front end splicing section to be attached to the front end of the adjacent spliced section, and installing the intermediate connecting mechanism at the connecting position between the front end splicing section and the adjacent spliced section; synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the front end splicing section from back to front along the longitudinal extension direction of the constructed pipe culvert, and completing the splicing construction process of the constructed pipe culvert;
the front end connecting mechanism comprises a front end connecting ring arranged at the front end of the front end splicing section and 2n anchorage devices 6 arranged on the front end connecting ring;
the adjacent spliced sections are pipe culvert spliced sections 1 adjacent to the front end connecting ring in the pipe culvert body;
before synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the front end splicing section, respectively installing the front ends of the 2n prestressed tendon sections on one anchorage device 6 at the front end of the front end splicing section;
step three, backfilling soil: and backfilling outside the corrugated steel pipe culvert in the second step to obtain a filled soil layer 15.
In this embodiment, when the soil is backfilled outside the corrugated steel pipe culvert in the second step, the soil is backfilled layer by layer from bottom to top and tamped.
In the embodiment, before the base construction in the first step, a channel where the constructed pipe culvert is located is excavated from back to front along the longitudinal extension direction of the constructed pipe culvert; when base construction is carried out in the first step, the base 16 is positioned in the channel formed by excavation; and step two, when the corrugated steel pipe culvert is spliced and constructed, the corrugated steel pipe culvert is positioned in the channel formed by excavation.
In this embodiment, n is 2.
During actual construction, the value of n can be adjusted correspondingly according to specific requirements. And the larger the inner diameter d of the corrugated steel pipe is, the larger the value of n is.
In the embodiment, each steel connecting ring is formed by splicing a plurality of arc-shaped splicing sections, the arc-shaped splicing sections are distributed on the same vertical surface along the circumferential direction, and two adjacent arc-shaped splicing sections are fixedly connected in a welding manner;
before splicing construction of the rear end splicing section in the step A1, a rear end connecting ring 3 is welded and fixed at the rear end of the rear end splicing section, and 2n anchorage devices 6 are arranged on the rear end connecting ring 3 to form the rear end connecting mechanism, so that the field splicing process and the field splicing time can be effectively saved;
before splicing construction of the front end connecting section in the step A4, the front end connecting ring is welded and fixed at the front end of the front end splicing section, and 2n anchorage devices 6 are arranged on the front end connecting ring to form the front end connecting mechanism, so that the field splicing process and the field splicing time can be effectively saved;
when the intermediate connection mechanism is installed at the connection position between the currently spliced section and the rear-side spliced section in step a2, splicing a plurality of arc-shaped spliced sections forming the intermediate connection ring 2 at the connection position between the currently spliced section and the rear-side spliced section to obtain a spliced intermediate connection ring 2;
before splicing the arc-shaped splicing sections forming the intermediate connecting ring 2, respectively fixing 4n of the anchorage devices 6 on the arc-shaped splicing sections of the intermediate connecting ring 2; or after the middle connecting ring 2 is assembled and formed, 4n anchorage devices 6 are respectively fixed on the assembled and formed middle connecting ring 2.
During the actual construction of assembling, the steel connecting ring is simple and convenient to be under construction and stable in structure, excellent in use effect. In the embodiment, for simple and convenient processing, convenient connection and reliable connection, the front side wall and the rear side wall of the steel connecting ring are vertical side walls.
As shown in fig. 1, the anchorage device 6 installed at the rear end of each prestressed tendon segment is a fixed-end anchorage device, and the anchorage device 6 installed at the front end of each prestressed tendon segment is a tensile-end anchorage device; the rear end connecting ring 3 is provided with 2n fixed end anchorages, and the front end connecting ring is provided with 2n tensioning end anchorages; each intermediate connecting ring 2 is provided with 2n fixed end anchorages and 2n tensioning end anchorages.
In this embodiment, as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, a rear end of the rear-end tendon segment of the combined tendon 4 located at the uppermost portion in each tendon group is fixed to the rear-side connection ring of the rear-end splicing section by an anchor 6, and a rear end of the rear-end tendon segment of the combined tendon 4 located at the lowermost portion in each tendon group is fixed to the rear-side connection ring of the third splicing section by an anchor 6.
With reference to fig. 9, each intermediate connection ring 2 is provided with 2n guide seats 12 for guiding the tendon segments, the 2n guide seats 12 are arranged along the circumferential direction and are all steel support seats, each guide seat 12 is provided with a guide hole 7 for guiding one tendon segment, and the guide hole 7 is a circular hole; each guide seat 12 is fixed on the outer side wall of the middle connecting ring 2;
before the arc-shaped splicing sections forming the intermediate connecting ring 2 are spliced in the step a2, fixing 2n guide bases 12 on the arc-shaped splicing sections of the intermediate connecting ring 2 respectively; or after the middle connecting ring 2 is assembled and molded, respectively fixing the 2n guide seats 12 on the assembled and molded middle connecting ring 2;
before synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the currently spliced section in the step A2, firstly, each prestressed tendon section to be tensioned at the front end of the currently spliced section passes through one guide seat 12 at the rear end of the currently spliced section, then, the front end of each prestressed tendon section to be tensioned at the front end of the currently spliced section is respectively installed on one anchorage device 6 at the front end of the currently spliced section, and each prestressed tendon section is arranged along the longitudinal extension direction of the constructed pipe gallery.
In the in-service use process, lead to each straight prestressing tendons festival section 5's middle part through guide holder 12, can portably, effectively ensure straight prestressing tendons festival section 5's extending direction to can ensure straight prestressing tendons festival section 5 wear to establish the effect, the later stage of being convenient for simultaneously carries out the dismouting.
With reference to fig. 8 and 9, in this embodiment, both the front and rear ends of each pipe culvert splicing section 1 are a wave trough of the corrugated steel pipe, and both the front and rear ends of each pipe culvert splicing section 1 are symmetrically arranged; adjacent two around pipe culvert concatenation section 1 includes the back concatenation section and is located concatenation section front side after and with the preceding concatenation section that concatenation section is connected after, the front end of back concatenation section with the rear end of preceding concatenation section is hugged closely, all pipe culvert concatenation sections 1 connect into a concatenation formula corrugated steel pipe in the pipe culvert body, and adjacent two around the junction between pipe culvert concatenation section 1 is a trough position of concatenation formula corrugated steel pipe.
Because every both ends are around the pipe culvert concatenation section 1 a trough of corrugated steel pipe makes adjacent two around like this the junction between the pipe culvert concatenation section 1 does a trough of concatenation formula corrugated steel pipe can effectively ensure like this the ripple continuation of concatenation formula corrugated steel pipe does benefit to the full play of concatenation formula corrugated steel pipe advantage and performance.
The outer diameters of the middle connecting ring 2, the front end connecting ring and the rear end connecting ring 3 are the same, the outer diameters of the middle connecting ring, the front end connecting ring and the rear end connecting ring are not larger than the outer diameter of the corrugated steel pipe, the anchor backing plates of the anchors 6 are welded and fixed on the outer side wall of the steel connecting ring, and the anchor backing plates of all the anchors 6 distributed on the same steel connecting ring and the steel connecting ring are distributed on the same cross section of the spliced corrugated steel pipe. In this embodiment, the outer diameters of the front end connection ring and the rear end connection ring 3 are both smaller than the outer diameter of the corrugated steel pipe.
In this embodiment, the thicknesses of the front end connection ring and the rear end connection ring 3 are the same, the thickness of the rear end connection ring 3 is half of the thickness of the middle connection ring 2, and the thickness of the rear end connection ring 3 is 1cm to 8 cm; the thickness of the anchor backing plate in the anchorage device 6 is the same as that of the steel connecting ring fixed by the anchorage device.
During actual processing, the thicknesses of the front end connecting ring, the rear end connecting ring 3 and the middle connecting ring 2 can be adjusted correspondingly according to specific requirements. The larger the inner diameter d of the corrugated steel pipe is, the larger the thicknesses of the front end coupling ring, the rear end coupling ring 3, and the intermediate coupling ring 2 are.
In order to further increase the stability of the joint between the front and rear adjacent pipe culvert splicing sections 1, an outer reinforcing ring 8 is sleeved outside the joint between the front and rear adjacent pipe culvert splicing sections 1, the region where each intermediate connecting ring 2 is located is a region to be reinforced, and the region to be reinforced is annular and is located between two corrugated vertexes of the spliced corrugated steel pipe; the outer reinforcing ring 8 is annular and has an arched cross section, the outer reinforcing ring 8 is sleeved on the spliced corrugated steel pipe, the inner side wall of the outer reinforcing ring 8 is tightly attached to the outer side wall of the spliced corrugated steel pipe, and the cross section shape and size of the inner side wall of the outer reinforcing ring 8 are the same as those of the outer side wall of the spliced corrugated steel pipe at the position of the outer reinforcing ring; the longitudinal length of the outer reinforcing ring 8 is d1, the value range of d1 is 0.15 lambda-0.3 lambda, wherein lambda is the wave pitch of the corrugated steel pipe;
the outer reinforcing rings 8 are steel rings, each intermediate connecting ring 2 is sleeved on one outer reinforcing ring 8 and fixedly connected with the outer reinforcing ring 8, and each intermediate connecting ring 2 and the outer reinforcing ring 8 fixed by the intermediate connecting ring 2 are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe. During the actual use, the junction between the adjacent two pipe culvert splicing sections 1 is reinforced through middle go-between 2, and is further reinforced through outer reinforcement ring 8 simultaneously. Meanwhile, the outer reinforcing ring 8 is sleeved on the spliced corrugated steel pipe, the sleeving is simple and convenient, the position is fixed, the reinforcing effect is good, the outer reinforcing ring 8 is matched with the middle connecting ring 2 for combined reinforcement, the middle connecting ring 2 plays a supporting role during reinforcement, the inner side wall of the outer reinforcing ring 8 is tightly attached to the outer side wall of the spliced corrugated steel pipe, and therefore the reinforcement of the outer reinforcing ring 8 is more direct and reliable. Simultaneously, because the inside wall of outer reinforcement ring 8 with the lateral wall of concatenation formula corrugated steel pipe is hugged closely, therefore outer reinforcement ring 8 is equivalent to one and is adjacent two around the shutoff ring that the junction carries out the shutoff between the pipe culvert concatenation section 1, can further increase adjacent two around the increase the tightness of junction between the pipe culvert concatenation section 1 ensures structural stability, structural strength and the tightness at longitudinal joint position in the concatenation formula corrugated steel pipe effectively strengthen the anti permeability of longitudinal joint position in the concatenation formula corrugated steel pipe.
In addition, the outer reinforcing ring 8 is an annular plugging piece, can comprehensively plug the joint between the front and back adjacent pipe culvert splicing sections 1, and avoids any leakage possibility. Compared with the conventional water stop strip arranged at the joint between the two adjacent pipe culvert splicing sections 1 in the front and at the back, the traditional water stop strip is only arranged between the two adjacent pipe culvert splicing sections 1, the traditional water stop strip is in a circular line type plugging mode, so that the tightness cannot be ensured, and a gap inevitably exists between the water stop strip and the two adjacent pipe culvert splicing sections 1, so that a leakage gap inevitably exists, and the water stop strip inevitably deforms and shifts along with the increase of the service time, so that the leakage problem is more serious; meanwhile, once leakage occurs, all splicing sections of the pipe gallery need to be spliced again, and the later-stage maintenance workload is large. The outer reinforcing ring 8 is a covering type plugging structure, the outer reinforcing ring 8 integrally plugs and covers the joint between the two adjacent pipe culvert splicing sections 1, so that a tight plugging effect can be simply and conveniently realized, the outer reinforcing ring 8 is equivalent to an annular surface type plugging structure, the effective plugging area is larger, and the anti-leakage effect can be obviously improved; in addition, because outer reinforcing ring 8 is holistic structure, the structural stability is high, can not take place to warp and shift because of the live time increases, therefore can further guarantee pit seepage effect.
During actual machining, the longitudinal length d1 of the outer reinforcing ring 8 can be adjusted according to specific needs, and the larger the inner diameter d of the corrugated steel pipe is, the larger the longitudinal length d1 of the outer reinforcing ring 8 is.
In this embodiment, a rear end reinforcing ring 9 is arranged at the rear end of the rear end splicing section, a front end reinforcing ring is arranged at the front end of the front end splicing section, and the rear end reinforcing ring 9 and the front end reinforcing ring have the same structure and size and are symmetrically arranged; the rear end reinforcing ring 9 is hooped outside the rear end of the spliced corrugated steel pipe, and the front end reinforcing ring is hooped outside the front end of the spliced corrugated steel pipe; the inner side walls of the rear end reinforcing ring 9 and the front end reinforcing ring are tightly attached to the outer side wall of the spliced corrugated steel pipe at the position of the rear end reinforcing ring 9 and the front end reinforcing ring, the cross section shapes and the sizes of the inner side walls of the rear end reinforcing ring 9 and the front end reinforcing ring are the same as the cross section shapes and the sizes of the outer side walls of the spliced corrugated steel pipe at the position of the rear end reinforcing ring 9 and the front end reinforcing ring, and the rear end reinforcing ring 9 and the front end reinforcing ring are welded and fixed on the spliced corrugated steel pipe; the rear end reinforcing ring 9 and the front end reinforcing ring are both steel rings and are both circular rings, and the longitudinal length of the rear end reinforcing ring 9 is half of the longitudinal length of the outer reinforcing ring 8.
The rear end connecting ring 3 is sleeved on the rear end reinforcing ring 9 and fixedly connected with the rear end reinforcing ring 9, the rear end connecting ring 3 and the rear end reinforcing ring 9 are coaxially arranged and arranged on the same cross section of the splicing type corrugated steel pipe, and the rear end surfaces of the rear end connecting ring 3 and the rear end reinforcing ring 9 are flush with the rear end of the rear end splicing section. Thus, the rear end of the spliced corrugated steel pipe is further reinforced by the rear end reinforcing ring 9 while being reinforced by the rear end connecting ring 3. Meanwhile, the rear-end reinforcing ring 9 is sleeved on the spliced corrugated steel pipe, the sleeving is simple and convenient, the position is fixed, the reinforcing effect is good, the rear-end reinforcing ring 9 is matched with the rear-end connecting ring 3 for combination and reinforcement, the rear-end connecting ring 3 plays a supporting role while being reinforced, the inner side wall of the rear-end reinforcing ring 9 is attached to the outer side wall of the spliced corrugated steel pipe, and therefore the reinforcing of the rear-end reinforcing ring 9 is more direct and reliable. Meanwhile, the inner side wall of the rear end reinforcing ring 9 is tightly attached to the outer side wall of the spliced corrugated steel pipe, so that the rear end reinforcing ring 9 can further increase the structural stability and structural strength of the rear end of the spliced corrugated steel pipe.
Correspondingly, the front end connecting ring is sleeved on the front end reinforcing ring and fixedly connected with the front end reinforcing ring, the front end connecting ring and the front end reinforcing ring are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe, and the front end surfaces of the front end connecting ring and the front end reinforcing ring are flush with the front end of the front end splicing section. In actual use, the front end of the spliced corrugated steel pipe is further reinforced by the front end reinforcing ring while the front end connecting ring is reinforced. Meanwhile, the front end reinforcing ring is sleeved on the spliced corrugated steel pipe, the sleeving is simple and convenient, the position is fixed, the reinforcing effect is good, the front end reinforcing ring is matched with the front end connecting ring for combined reinforcement, the front end connecting ring plays a supporting role while reinforcing, the inner side wall of the front end reinforcing ring is attached to the outer side wall of the spliced corrugated steel pipe, and therefore the front end reinforcing ring is more direct and reliable in reinforcement. Meanwhile, the inner side wall of the front end reinforcing ring is tightly attached to the outer side wall of the spliced corrugated steel pipe, so that the structural stability and the structural strength of the front end of the spliced corrugated steel pipe can be further improved by the front end reinforcing ring.
The rear end reinforcing ring 9, the front end reinforcing ring and the outer reinforcing ring 8 are formed by splicing a plurality of arc connecting sections, the arc connecting sections are arranged on the same vertical surface along the circumferential direction, and every two adjacent arc connecting sections are fixedly connected in a welding mode. The rear end reinforcing ring 9, the front end reinforcing ring and the outer reinforcing ring 8 are outer reinforcing rings.
In this embodiment, the arc-shaped connecting section is an arc-shaped steel plate strip which is vertically arranged. During actual processing, the number of the arc-shaped connecting sections in the outer side reinforcing ring and the length and the arrangement position of each arc-shaped connecting section can be adjusted correspondingly according to specific requirements. Therefore, the outer reinforcing ring is simple and convenient to process and flexible in processing mode, and the outer reinforcing ring is simple and convenient to connect with the pipe culvert body.
In the step a1, before the rear end of the rear end splicing section is welded and fixed with the rear end connecting ring 3, the rear end reinforcing ring 9 is welded and fixed on the outer side of the rear end splicing section, and then the rear end connecting ring 3 is welded and fixed on the rear end reinforcing ring 9;
in the step a4, before the front end of the front end splicing section is welded and fixed with the front end connecting ring, the front end reinforcing ring is welded and fixed at the front end of the front end splicing section, and then the front end connecting ring is welded and fixed on the front end reinforcing ring;
before splicing the plurality of arc-shaped splicing sections forming the middle connecting ring 2 in the step A2, firstly splicing the plurality of arc-shaped connecting sections forming the outer reinforcing ring 8 to obtain a spliced outer reinforcing ring 8; and then a plurality of the arc-shaped splicing sections forming the middle connecting ring 2 are spliced on the outer reinforcing ring 8.
In practical use, each intermediate connecting ring 2 is radially limited by 2n straight prestressed steel bar sections 5 penetrating through the guide seat 12, so that the outer reinforcing ring and the spliced corrugated steel pipe are not fixedly connected, the outer reinforcing ring is only required to be installed in place, the inner side wall of the outer reinforcing ring is attached to the outer side wall of the spliced corrugated steel pipe, the cross-sectional shape and size of the inner side wall of the outer reinforcing ring are the same as those of the outer side wall of the spliced corrugated steel pipe at the arrangement position, and the outer reinforcing ring is clamped between two corrugations in the spliced corrugated steel pipe, so that the position of the outer reinforcing ring is fixed in the practical use process, and the spliced corrugated steel pipe is effectively reinforced, the outer wall of the spliced corrugated steel pipe can be tightly attached to the outer wall of the spliced corrugated steel pipe for tight plugging, and a good anti-leakage effect is achieved; meanwhile, the outer side reinforcing ring and the splicing type corrugated steel pipe do not need to be fixedly connected, so that the splicing is simple and convenient on site, the splicing construction efficiency is high, the construction period is short, and the problems that the connection of the interface position is complex, the interface position is easy to damage and leak and the like in the existing splicing type corrugated steel pipe culvert can be effectively solved. In addition, to every 5 rear ends of all straight prestressing tendons segments in the 1 outside of pipe culvert concatenation section are fixed and when carrying out the stretch-draw to its front end, all through ground tackle 6 the steel go-between with outside reinforcement hoop under the oblique inward effect of concatenation formula corrugated steel pipe construction to can further carry out radial spacing to intermediate junction ring 2, and further make the inside wall of outside reinforcement ring with the lateral wall of concatenation formula corrugated steel pipe is hugged closely, further improves the steel go-between with the reinforcing effect of outside reinforcement ring can ensure the shutoff effect of outer reinforcement ring 8 simultaneously.
In this embodiment, in order to further ensure the structural stability and integrity of the spliced corrugated steel pipe, an inner reinforcing ring 14 is arranged inside each steel connecting ring, the inner reinforcing ring 14 is annular and is sleeved inside the spliced corrugated steel pipe, and the outer side wall of the inner reinforcing ring 14 is tightly attached to the inner side wall of the spliced corrugated steel pipe; the longitudinal length of the inner reinforcing ring 14 is d2, and the value range of d2 is 0.08 lambda-0.2 lambda; each inner reinforcing ring 14 and the steel connecting ring positioned at the outer side of the inner reinforcing ring are coaxially arranged and are uniformly distributed on the same cross section of the spliced corrugated steel pipe;
the inner reinforcing ring 14 is a steel ring, and the inner reinforcing ring 14 and the spliced corrugated steel pipe are welded and fixed into a whole.
During the actual manufacturing process, the longitudinal length d2 of the inner reinforcing ring 14 can be adjusted accordingly according to specific needs, and the larger the longitudinal length of the outer reinforcing ring located outside the inner reinforcing ring 14, the larger the longitudinal length d2 of the inner reinforcing ring 14.
In this embodiment, to ensure the support stability of the inner reinforcing ring 14, the inner reinforcing ring 14 is an integral reinforcing ring.
In this embodiment, after the splicing construction of the rear end splicing section in step a1 is completed, an inner reinforcement ring 14 is erected on the inner side of the rear end splicing section, and the inner reinforcement ring 14 is supported in the rear end splicing section;
step A4, after the front end splicing section with the front end connecting mechanism is moved in place, an inner reinforcing ring 14 is erected on the inner side of the front end splicing section, the inner reinforcing ring 14 is supported in the front end splicing section, and then 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are synchronously tensioned from back to front along the longitudinal extension direction of a constructed pipe culvert;
when the next splicing section splicing construction is performed in step a2, an inner reinforcing ring 14 is erected on the inner side of the front end of the rear-side spliced section, and the inner reinforcing ring 14 is supported in the rear-side spliced section; then, the current spliced section is moved to the right position by adopting hoisting equipment, the rear end of the hoisted current spliced section is enabled to be tightly attached to the front end of the rear-side spliced section, and the inner reinforcing ring 14 erected in the step is enabled to be supported on the inner side of the joint between the current spliced section and the rear-side spliced section; thereafter, an intermediate connection mechanism is installed at the connection between the currently spliced section and the rear spliced section.
As shown in fig. 11, in order to further ensure the anti-leakage effect at the joint between the front and rear adjacent pipe culvert splicing sections 1 in the spliced corrugated steel pipe, an annular water stop 13 is clamped between the bottom of the outer reinforcing ring 8 and the spliced corrugated steel pipe, and the annular water stop 13 is annular;
before the plurality of arc-shaped connecting sections forming the outer reinforcing ring 8 are spliced in step a2, an annular water stop belt 13 is arranged outside the joint between the currently spliced section and the rear-side spliced section.
In this embodiment, the annular water stop 13 is a rubber water stop and has a longitudinal width smaller than the upper longitudinal width of the outer reinforcing ring 8. The longitudinal width of the annular water stop belt 13 is larger than 2 cm.
Compared with the conventional water stop strip arranged at the joint between the two adjacent pipe culvert splicing sections 1 in the front and at the back, the traditional water stop strip is only arranged between the two adjacent pipe culvert splicing sections 1, and the traditional water stop strip is closed in a loop mode, so that the tightness cannot be ensured, and a gap inevitably exists between the water stop strip and the two adjacent pipe culvert splicing sections 1, so that a leakage gap inevitably exists, and the water stop strip is easy to deform and shift along with the increase of the service time, so that the leakage problem is more serious; simultaneously, in case the seepage takes place, need splice again all piping lane, later stage maintenance work load is big. The annular water stop belt 13 arranged between the outer reinforcing ring 8 and the spliced corrugated steel pipe is of a covering type plugging structure, the outer reinforcing ring 8 integrally plugs and covers the joint between the two adjacent pipe culvert splicing sections 1, so that a tight plugging effect can be simply and conveniently realized, the outer reinforcing ring 8 is equivalent to an annular surface type plugging structure, the effective plugging area is larger, and the anti-leakage effect can be obviously improved; in addition, because annular waterstop 13 pad dress in outer reinforced ring 8 with between the concatenation formula corrugated steel pipe, the structural stability is high, and annular waterstop 13 can not take place to warp and shift because of the live time increases, therefore can further guarantee pit seepage effect.
As shown in fig. 8, the positions of the anchors 6 fixed on the intermediate connection ring 2 are longitudinal positions to be reinforced, each longitudinal position to be reinforced is provided with a longitudinal reinforcing structure, each longitudinal reinforcing structure and one anchor 6 are arranged on the same plane, each longitudinal reinforcing structure is located in one region to be reinforced and is arranged along the longitudinal extension direction of the constructed pipe culvert;
each longitudinal reinforcing structure comprises two longitudinal reinforcing plates 10 symmetrically arranged on the front side and the rear side of the middle connecting ring 2, each longitudinal reinforcing plate 10 is a straight steel plate, and the bottom of each longitudinal reinforcing plate 10 is fixed on the outer side wall of the outer reinforcing ring 8; the two longitudinal reinforcing plates 10 in each longitudinal reinforcing structure are uniformly distributed on the same plane and are distributed along the longitudinal extension direction of the constructed pipe culvert; the longitudinal reinforcing structures on the same cross section of the spliced corrugated steel pipe are distributed along the circumferential direction, and each longitudinal reinforcing structure is vertically distributed with the outer reinforcing ring 8 fixed by the longitudinal reinforcing structure; one side wall of the longitudinal reinforcing plate 10 is a vertical side wall and is fixed on the middle connecting ring 2, the other side wall of the longitudinal reinforcing plate 10 is supported on the outer side wall of the spliced corrugated steel pipe, and the other side wall of the longitudinal reinforcing plate 10 is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position; the shape and the size of the other side wall of the longitudinal reinforcing plate 10 are the same as the shape and the size of the cross section of the outer side wall of the spliced corrugated steel pipe at the supporting position; the upper part of the longitudinal reinforcing plate 10 is a horizontal plane and the upper part thereof is flush with the outer side wall of the fixed middle connecting ring 2;
the position of the anchorage device 6 on the rear end connecting ring 3 is a rear end to-be-reinforced position, a rear end reinforcing plate 11 is arranged on each rear end to-be-reinforced position, the structure of each rear end reinforcing plate 11 is the same as that of the longitudinal reinforcing plate 10, each rear end reinforcing plate 11 is a straight steel plate, and the bottom of each rear end reinforcing plate is fixed on the outer side wall of the rear end reinforcing ring 9; the rear end reinforcing plate 11 is arranged along the longitudinal extension direction of the constructed pipe culvert; the rear end reinforcing plates 11 on the spliced corrugated steel pipe are distributed along the circumferential direction, and each rear end reinforcing plate 11 is vertically distributed with the rear end reinforcing ring 9 fixed by the rear end reinforcing plate; the rear side wall of the rear end reinforcing ring 9 is a vertical side wall and is fixed on the rear end connecting ring 3, the front side wall of the rear end reinforcing ring 9 is supported on the outer side wall of the spliced corrugated steel pipe, and the front side wall of the rear end reinforcing ring 9 is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position; the shape and the size of the front side wall of the rear end reinforcing ring 9 are the same as the shape and the size of the cross section of the outer side wall of the spliced corrugated steel pipe at the supporting position; the upper part of the rear end reinforcing ring 9 is a horizontal plane and the upper part thereof is flush with the outer side wall of the fixed rear end connecting ring 3;
the position of the anchorage device 6 on the front end connecting ring is a front end to-be-reinforced position, a front end reinforcing plate is arranged on each front end to-be-reinforced position, the structures and the sizes of the front end reinforcing plate and the rear end reinforcing plate 11 are the same, the front end reinforcing plate is a straight steel plate, and the bottom of the front end reinforcing plate is fixed on the outer side wall of the front end reinforcing ring; the front end reinforcing plate is arranged along the longitudinal extension direction of the constructed pipe culvert; the front end reinforcing plates are arranged along the circumferential direction, and each front end reinforcing plate is vertically arranged with the front end reinforcing ring fixed by the front end reinforcing plate; the front side wall of the front end reinforcing ring is a vertical side wall and is fixed on the front end connecting ring, the rear side wall of the front end reinforcing ring is supported on the outer side wall of the spliced corrugated steel pipe, and the rear side wall of the front end reinforcing ring is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position of the front end reinforcing ring; the shape and the size of the rear side wall of the front end reinforcing ring are the same as the shape and the size of the cross section of the outer side wall of the spliced corrugated steel pipe at the supporting position; the upper portion of the front end reinforcing ring is a horizontal plane and the upper portion of the front end reinforcing ring is flush with the outer side wall of the fixed front end connecting ring.
In this embodiment, as shown in fig. 9, the positions of the fixed guide seats 12 on the intermediate connection ring 2 are the longitudinal positions to be reinforced, and each of the longitudinal positions to be reinforced is provided with a longitudinal reinforcing structure, so that the force transmission effect and the reinforcing effect can be further enhanced.
The rear end reinforcing plate 11, the front end reinforcing plate and the longitudinal reinforcing plate 10 are all longitudinal force transmission plates.
In actually carrying out the concatenation work progress, to every 5 rear ends in all straight prestressing tendons segments in the 1 outside of pipe culvert concatenation section are fixed and when carrying out the stretch-draw to its front end, all through ground tackle 6 the steel go-between with outside reinforcement hoop under the oblique inward effect of concatenation formula corrugated steel pipe construction, through vertical biography power board will apply in concatenation formula corrugated steel pipe front end concatenation formula corrugated steel pipe rear end and adjacent two the slant internal force dispersion on the junction between the pipe culvert concatenation section 1 is transmitted extremely other regions of concatenation formula corrugated steel pipe to can effectively reduce the effect in concatenation formula corrugated steel pipe front end concatenation formula corrugated steel pipe rear end and adjacent two the effort of junction between the pipe culvert concatenation section 1 is right both ends and adjacent two around the concatenation formula corrugated steel pipe the structural stability and the result of use of junction between the pipe culvert concatenation section 1 are further guaranteed. Simultaneously, because vertical power transmission plate with the lateral wall of concatenation formula corrugated steel pipe is hugged closely, therefore can further increase outside reinforcing ring with the steadiness of steel connecting ring, it is further right outside reinforcing ring with the steel connecting ring carries out effective spacing, through vertical power transmission plate makes outside reinforcing ring with the steel connecting ring forms a whole and clamps between two ripples of concatenation formula corrugated steel pipe, through vertical power transmission plate can further be right outside reinforcing ring with the steel connecting ring carries out spacing, makes outside reinforcing ring with the reinforcing effect of steel connecting ring more fully play, makes the shutoff effect of outer reinforcing ring 8 better simultaneously. In addition, the outer side reinforcing ring and the steel connecting ring can be further limited through the longitudinal force transmission plate, so that the outer side reinforcing ring and the spliced corrugated steel pipe are not required to be fixedly connected at all, and the field assembly is simple and convenient.
During actual processing, the longitudinal force transmission plate and the steel connecting ring are fixedly connected into a whole, so that the field processing is simple and convenient.
In this embodiment, the plate thickness of the longitudinal reinforcing plate 10 is 1cm to 8cm, and the plate thickness of the rear end reinforcing plate 11 is 1cm to 8 cm.
In actual processing, the thicknesses of the longitudinal reinforcing plate 10 and the rear end reinforcing plate 11 can be adjusted according to specific requirements.
In order to further increase the structural stability, in this embodiment, the outer reinforcing ring 8 and the spliced corrugated steel pipe are welded and fixed together.
The longitudinal reinforcing plate 10, the rear end reinforcing plate 11 and the front end reinforcing plate are welded and fixed with the spliced corrugated steel pipe into a whole.
As shown in fig. 10, in this embodiment, the upper surface of the filling layer 15 is a horizontal surface; lanes for vehicles to travel are laid on the soil filling layer 15, and the number of the lanes is multiple;
the longitudinal lengths of the plurality of pipe culvert splicing sections 1 in the pipe culvert body are the same;
before splicing construction of the next splicing section in the step A2, according to a formula
Minimum value of tensile force F to the prestressed tendon sectionmDetermining;
in formula (I), FMIs the positive pressure F of each pipe culvert splicing section 1 in the limit stateM＝γ0(γDND+γLNL) A (II); in formula (II), γ0Is the structural main coefficient and gamma of the pipe culvert splicing section 10＝1.1，γDIs a constant load partial coefficient and gammaD＝1.2，γLIs a live load polynomial coefficient and gammaL1.4; a is the cross-sectional area of the pipe culvert splicing section 1 and the unit of the cross-sectional area is m2；
NDIs the corrugated steel pressure caused by the earth gravity and ND＝0.5(1.0-0.1Cs)AfW，NDHas the unit of kN/m, AfThe soil pressure increase coefficient for considering the arching effect of the structure; w is the gravity of filling soil per linear meter above the pipe culvert splicing section 1 and the unit is kN/m, W is gamma.Dh·(H+0.1075DV) Wherein gamma is the weight of the soil filled on the pipe culvert splicing section 1 and the unit of gamma is kN/m3，DhIs the effective span of the pipe culvert splicing section 1 and the unit is m, DVThe effective rise of the pipe culvert splicing section 1 is m, and the H is the filling height above the top of the pipe culvert splicing section 1 and is m;
Csthe soil pressure reduction coefficient for considering the backfill property and the structure size
E is the elastic modulus of the corrugated steel plate used in the pipe culvert splicing section 1 and the unit is MPa, EsThe modulus of elasticity of the soil filled on the splicing section 1 of the pipe culvert is MPa;
NLcorrugated steel pressure caused by vehicle load and NL＝0.5DhσL，NLThe unit of (a) is kN/m;
σLfor the pressure of the vehicle load extending to the vault of the pipe culvert splicing section 1 and the unit of the pressure is kN/m,
wherein μ is a vehicle impact expansion coefficient and μ is 0.4 (1.0-0.5H); a. thelThe total axle weight standard value of the vehicle arranged in the span range of the pipe culvert splicing section 1 is kN, the w is the size of the pipe culvert splicing section 1 after diffusion along the width direction of the lane and the unit is m, ltIs the size of the pipe culvert splicing section 1 after diffusion along the length direction of the lane and the unit of the size is m, mfIs a multilane reduction factor;
in step A2Follow the longitudinal extension direction of the pipe culvert under construction by 2n way that need stretch-draw to the second concatenation section front end forward when the prestressing tendons section is stretched tension in step, 2n way that need stretch-draw of second concatenation section front end prestressing tendons section all the same and every the tension force of prestressing tendons section is all not less than 2F allm；
When synchronously tensioning the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section from back to front in the longitudinal extension direction of the constructed pipe culvert in the step A4, the tensioning forces of the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are the same, and the tensioning force of each prestressed tendon section is not less than 2Fm；
All the pipe culvert splicing sections 1 in the pipe culvert body except the rear end splicing section, the front end splicing section and the second splicing section are middle splicing sections;
in the step A2, any one of the middle splicing section front end is required to be tensioned 2n ways from back to front along the longitudinal extension direction of the constructed pipe culvert when the prestressed tendon sections are synchronously tensioned, the middle splicing section front end is required to be tensioned 2n ways, the tensioning force of the prestressed tendon sections is the same and each waym。
Wherein, the person skilled in the art can increase the coefficient A of the soil pressure considering the arching effect of the structure according to the common knowledge in the fieldfTotal axle weight standard value A of vehicles arranged in 1 span range of pipe culvert splicing sectionlThe size w of the pipe culvert splicing section 1 after diffusion along the width direction of the lane and the size l of the pipe culvert splicing section 1 after diffusion along the length direction of the lanetAnd a multilane reduction factor mfAnd the like. For the soil pressure increase coefficient A considering the arching effect of the structurefTotal axle weight standard value A of vehicles arranged in 1 span range of pipe culvert splicing sectionlThe size w of the pipe culvert splicing section 1 after diffusion along the width direction of the lane and the size l of the pipe culvert splicing section 1 after diffusion along the length direction of the lanetAnd a multilane reduction factor mfWhen the parameters are determined, according to technical rules of corrugated steel comprehensive pipe gallery engineering 2017The determination can be carried out according to the general standard of highway bridge design.
In this embodiment, Dh＝DV＝D。
In the actual use process, the minimum value F of the tension force of the prestressed tendon section is obtainedmThe tension can be simply, conveniently, quickly and accurately determined by determining, so that the reinforcing effect of the prestress reinforcing structure is further ensured, the operability is high, the integrity, the stress performance and the durability of the corrugated steel pipe culvert formed by construction can be effectively ensured, and the using effect of the corrugated steel pipe culvert formed by construction is ensured. And, a minimum value F of the tensile force on the tendon segmentmThe determination method is reasonable in design and accurate in result, determination is carried out by integrating the filling layer 15 above the corrugated steel pipe culvert, the lane layout condition and the like, and finally the determined tension force minimum value FmThe minimum tension force F can be ensured according to the actual condition of the constructed pipe culvertmThe accuracy of (2).
In order to improve the waterproof and anticorrosive effects, the pipe culvert splicing section 1 is a galvanized steel splicing section, the outer side reinforcing ring, the steel connecting ring and the inner reinforcing ring are galvanized steel rings, and the longitudinal force transmission plate is a galvanized steel plate. And the outer side of the straight prestressed reinforcement section 5 is coaxially sleeved with a plastic sleeve, and the anchorage is a galvanized steel support anchorage.
The corrugation direction (also called as corrugation direction) of the corrugated steel pipe is the transverse width direction of the pipe culvert body, and the corrugation direction of the corrugated steel pipe refers to the arrangement direction of corrugations on the corrugated steel pipe and also can be called as the extension direction of a wave trough or a wave crest on the corrugated steel pipe.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. A construction method of a corrugated steel pipe culvert is characterized by comprising the following steps: the constructed pipe culvert comprises a base (16) and a corrugated steel pipe culvert supported on the base (16), wherein the base (16) is a cast-in-place reinforced concrete base; the base (16) and the corrugated steel pipe culvert are arranged along the longitudinal extension direction of the constructed pipe culvert; a soil filling layer (15) is arranged on the outer side of the constructed pipe culvert, and the base (16) and the corrugated steel pipe culvert are both positioned in the soil filling layer (15);
the corrugated steel pipe culvert comprises a pipe culvert body formed by splicing a plurality of pipe culvert splicing sections (1) and a prestress reinforcing structure arranged on the outer side of the pipe culvert body, wherein the pipe culvert body is horizontally arranged, and the plurality of pipe culvert splicing sections (1) are arranged on the same straight line from back to front along the longitudinal extension direction of the constructed pipe culvert and are all supported on a base (16); each pipe culvert splicing section (1) is a corrugated steel pipe which is horizontally arranged and has a circular cross section, the pipe diameters of the plurality of pipe culvert splicing sections (1) are the same, each corrugated steel pipe is a straight steel pipe, and the cross section structures and the sizes of all the corrugated steel pipes in the pipe culvert body are the same; one pipe culvert splicing section (1) positioned at the rearmost side in the plurality of pipe culvert splicing sections (1) is a rear end splicing section, and one pipe culvert splicing section (1) positioned at the foremost side in the plurality of pipe culvert splicing sections (1) is a front end splicing section; the front and rear adjacent pipe culvert splicing sections (1) are connected through an intermediate connecting ring (2), the front end of the front end splicing section is coaxially provided with a front end connecting ring, the rear end of the rear end splicing section is coaxially provided with a rear end connecting ring (3), the intermediate connecting ring (2), the front end connecting ring and the rear end connecting ring (3) are all circular rings, and the three connecting rings are vertically arranged steel connecting rings; the three pipe culvert splicing sections (1) positioned at the rear side of the pipe culvert body are respectively a rear end splicing section, a second splicing section and a third splicing section from back to front, and the rear end splicing section is a first splicing section; the steel connecting ring positioned on the front side of each pipe culvert splicing section (1) is a front side connecting ring, and the steel connecting ring positioned on the rear side of each pipe culvert splicing section (1) is a rear side connecting ring;
the prestress reinforcing structure comprises a left prestress reinforcing structure and a right prestress reinforcing structure which are symmetrically arranged, and the two prestress reinforcing structures are symmetrically arranged above the left side and the right side of the base (16); each prestress reinforcing structure comprises n prestress rib groups which are arranged on the outer side of the pipe culvert body from top to bottom, the n prestress rib groups are identical in structure and are arranged along the longitudinal extension direction of the constructed pipe culvert; each prestressed tendon group consists of three combined prestressed tendons (4) arranged from top to bottom, and all the combined prestressed tendons (4) in the prestressed reinforcement structure are arranged along the circumferential direction; wherein n is a positive integer and the value range of n is 2-5; the prestressed reinforcement structure comprises 2n prestressed tendon groups, and the 2n prestressed tendon groups are distributed along the circumferential direction; the prestress reinforcing structure comprises 6n combined prestressed tendons (4), and the 6n combined prestressed tendons (4) are distributed along the circumferential direction;
each combined type prestressed tendon (4) comprises a plurality of prestressed tendon sections which are arranged from back to front along the longitudinal extension direction of the constructed pipe culvert, each prestressed tendon section is a straight prestressed tendon or prestressed stranded wire, and all prestressed tendon sections in each combined type prestressed tendon (4) are uniformly distributed on the same straight line; each prestressed tendon segment is horizontally arranged, the rear end of each prestressed tendon segment is an anchoring end, the front end of each prestressed tendon segment is a tensioning end, and an anchorage device (6) is arranged at each of the front end and the rear end of each prestressed tendon segment; one prestressed tendon section positioned at the rearmost side in each combined prestressed tendon (4) is a rear-end prestressed tendon section;
the rear end of each prestressed tendon section is fixed on the rear connecting ring of one pipe culvert splicing section (1) through one anchorage device (6), and the prestressed tendon section fixed on the rear connecting ring of each pipe culvert splicing section (1) is the prestressed tendon section fixed at the rear end of the pipe culvert splicing section (1);
the front end of each prestressed tendon section is arranged on the front connecting ring of one pipe culvert splicing section (1) through one anchorage device (6), and the prestressed tendon sections arranged on the front connecting ring of each pipe culvert splicing section (1) are all prestressed tendon sections needing to be tensioned at the front end of the pipe culvert splicing section (1);
all the pipe culvert splicing sections (1) except the front end splicing section and the rear end splicing section in the pipe culvert body are middle splicing sections, 2n prestressed tendon sections are uniformly distributed on the outer sides of the front end splicing section and the rear end splicing section, and 2n prestressed tendon sections distributed on the outer sides of the front end splicing section and the rear end splicing section are distributed along the circumferential direction; 4n prestressed tendon sections are uniformly distributed on the outer side of each middle splicing section, and the 4n prestressed tendon sections are distributed along the circumferential direction;
all the prestressed tendon sections in each combined prestressed tendon (4) are straight prestressed tendon sections (5); the front and rear adjacent two prestressed tendon sections in each combined type prestressed tendon (4) are respectively a rear side section and a front side section positioned on the front side of the rear side section, and one pipe culvert splicing section (1) is arranged between an anchorage (6) installed at the front end of the rear side section and an anchorage (6) installed at the rear end of the front side section;
the rear end of the rear end prestressed tendon section of one combined type prestressed tendon (4) in the three combined type prestressed tendons (4) is fixed on the rear side connecting ring of the rear end splicing section through an anchorage device (6), the rear end of the rear end prestressed tendon section of the other combined type prestressed tendon (4) is fixed on the rear side connecting ring of the second splicing section through an anchorage device (6), and the rear end of the rear end prestressed tendon section of the third combined type prestressed tendon (4) is fixed on the rear side connecting ring of the third splicing section through an anchorage device (6);
each flat prestressed tendon section (5) is positioned outside one two-section type splicing pipe gallery, and each two-section type splicing pipe gallery is formed by splicing two pipe culvert splicing sections (1) which are adjacent from front to back; the steel connecting ring positioned on the foremost side of the two-section type splicing pipe gallery is a front mounting ring, and the steel connecting ring positioned on the rearmost side of the two-section type splicing pipe gallery is a rear mounting ring; the anchors (6) installed at the front end of each straight prestressed tendon segment (5) are uniformly distributed on one front installation ring, the anchors (6) installed at the rear end of each straight prestressed tendon segment (5) are uniformly distributed on one rear installation ring, and each straight prestressed tendon segment (5) is connected between the front installation ring and the rear installation ring of one two-section splicing pipe gallery;
all the straight prestressed tendon sections (5) distributed on the same vertical surface in the pipe culvert body form a two-section tensioning prestressed reinforcing group for integrally reinforcing the two-section splicing pipe gallery, and all the anchorage devices (6) distributed on the same steel connecting ring are distributed along the circumferential direction and are all positioned on the same cross section of the pipe culvert body;
when the constructed pipe culvert is constructed, the method comprises the following steps:
step one, base construction: constructing the base (16) from back to front along the longitudinal extension direction of the constructed pipe culvert;
step two, corrugated steel pipe culvert splicing construction: splicing construction is respectively carried out on a plurality of pipe culvert splicing sections (1) of the corrugated steel pipe culvert on a base (16) which is constructed and formed in the first step from back to front along the longitudinal extension direction of the constructed pipe culvert, and the method comprises the following steps:
step A1, splicing construction of the rear end splicing section: moving the rear end splicing section with the rear end connecting mechanism in place by adopting hoisting equipment, and respectively penetrating 2n prestressed tendon sections fixed at the rear end of the rear end splicing section;
the rear end connecting mechanism comprises a rear end connecting ring (3) arranged at the rear end of the rear end splicing section and 2n anchorage devices (6) distributed on the rear end connecting ring (3);
when 2n prestressed tendon sections fixed at the rear end of the rear end splicing section are penetrated, the penetrating methods of the 2n prestressed tendon sections are the same; when any one prestressed tendon section fixed at the rear end of the rear end splicing section is penetrated, the rear end of the prestressed tendon section is fixed on one anchorage device (6) at the rear end of the rear end splicing section, and the prestressed tendon section is arranged along the longitudinal extension direction of the constructed pipe culvert;
step A2, splicing construction of the next splicing section: adopting hoisting equipment to move the next spliced pipe culvert section (1) to a proper position, enabling the rear end of the hoisted current spliced section to be tightly attached to the front end of the spliced section at the rear side, and installing an intermediate connecting mechanism at the connecting position between the current spliced section and the spliced section at the rear side; respectively penetrating 2n prestressed tendon sections fixed at the rear ends of the current spliced sections; after 2n prestressed tendon sections are completely penetrated, synchronously tensioning the 2n prestressed tendon sections needing to be tensioned at the front end of the currently spliced section from back to front along the longitudinal extension direction of the constructed pipe culvert;
the current spliced section is a spliced section (1) of the pipe culvert spliced in the step, and the rear spliced section is a spliced section (1) of the pipe culvert, which is positioned at the rear side of the current spliced section and is adjacent to the current spliced section; the middle connecting mechanism comprises the middle connecting ring (2) and 4n anchorage devices (6) arranged on the middle connecting ring (2);
when 2n prestressed tendon sections fixed at the rear end of the current spliced section are respectively penetrated, the penetrating methods of the 2n prestressed tendon sections are the same; when any one prestressed tendon section fixed at the rear end of the current spliced section is penetrated, the rear end of the prestressed tendon section is fixed on one anchorage device (6) at the rear end of the current spliced section, and the prestressed tendon section is arranged along the longitudinal extension direction of the constructed pipe culvert;
before 2n prestressed tendon sections needing to be tensioned at the front end of the current spliced section are synchronously tensioned, respectively installing the front ends of the 2n prestressed tendon sections on one anchorage (6) at the front end of the current spliced section;
step A3, repeating the step A2 for multiple times until the splicing construction process of all the pipe culvert splicing sections (1) positioned at the rear side of the front end connecting section in the pipe culvert body is completed;
step A4, splicing construction of the front end connecting section: adopting hoisting equipment to move the front end splicing section with the front end connecting mechanism in place, enabling the rear end of the front end splicing section to be attached to the front end of the adjacent spliced section, and installing the intermediate connecting mechanism at the connecting position between the front end splicing section and the adjacent spliced section; synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the front end splicing section from back to front along the longitudinal extension direction of the constructed pipe culvert, and completing the splicing construction process of the corrugated steel pipe culvert;
the front end connecting mechanism comprises a front end connecting ring arranged at the front end of the front end splicing section and 2n anchorage devices (6) arranged on the front end connecting ring;
the adjacent spliced sections are pipe culvert splicing sections (1) adjacent to the front end connecting ring in the pipe culvert body;
before synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the front end splicing section, respectively installing the front ends of the 2n prestressed tendon sections on one anchorage device (6) at the front end of the front end splicing section;
step three, backfilling soil: and in the second step, backfilling soil is backfilled on the outer side of the corrugated steel pipe culvert to obtain a filled soil layer (15).
2. The construction method of the corrugated steel pipe culvert according to claim 1, characterized in that: the inner diameter of the corrugated steel pipe is d, wherein the value range of d is phi 30 m-phi 80 m; wave height of the corrugated steel pipe
Wherein D is the outer diameter of the corrugated steel pipe, and the value range of h is 50-150 mm; the wave pitch of the corrugated steel pipe is lambda, and the value range of the lambda is 100-480 mm.
3. The construction method of the corrugated steel pipe culvert according to claim 1 or 2, characterized in that: each steel connecting ring is formed by splicing a plurality of arc-shaped splicing sections, the arc-shaped splicing sections are distributed on the same vertical surface along the circumferential direction, and two adjacent arc-shaped splicing sections are fixedly connected in a welding mode;
before splicing construction of the rear end splicing section in the step A1, a rear end connecting ring (3) is welded and fixed at the rear end of the rear end splicing section, and 2n anchorage devices (6) are arranged on the rear end connecting ring (3) to form a rear end connecting mechanism;
before splicing construction of a front end connecting section in the step A4, welding and fixing the front end connecting ring at the front end of the front end splicing section, and then arranging 2n anchorage devices (6) on the front end connecting ring to form the front end connecting mechanism;
when the intermediate connecting mechanism is installed at the connecting position between the current spliced section and the rear spliced section in the step A2, splicing a plurality of arc-shaped spliced sections forming the intermediate connecting ring (2) at the connecting position between the current spliced section and the rear spliced section to obtain a spliced intermediate connecting ring (2);
before splicing the arc-shaped splicing sections forming the intermediate connecting ring (2), respectively fixing 4n anchorage devices (6) on the arc-shaped splicing sections of the intermediate connecting ring (2); or after the middle connecting ring (2) is assembled and formed, 4n anchorage devices (6) are respectively fixed on the assembled and formed middle connecting ring (2).
4. The construction method of the corrugated steel pipe culvert according to claim 3, characterized in that: each intermediate connecting ring (2) is provided with 2n guide seats (12) for guiding the prestressed tendon sections, the 2n guide seats (12) are distributed along the circumferential direction and are all steel support seats, each guide seat (12) is provided with a guide hole (7) for guiding one prestressed tendon section, and each guide hole (7) is a round hole; each guide seat (12) is fixed on the outer side wall of the middle connecting ring (2);
before splicing the arc-shaped splicing sections forming the intermediate connecting ring (2) in the step A2, respectively fixing 2n guide bases (12) on the arc-shaped splicing sections of the intermediate connecting ring (2); or after the middle connecting ring (2) is assembled and molded, respectively fixing the 2n guide seats (12) on the assembled and molded middle connecting ring (2);
before synchronously tensioning 2n prestressed tendon sections to be tensioned at the front end of the currently spliced section in the step A2, firstly, enabling each prestressed tendon section to be tensioned at the front end of the currently spliced section to penetrate through a guide seat (12) at the rear end of the currently spliced section, then, respectively installing the front end of each prestressed tendon section to be tensioned at the front end of the currently spliced section on one anchorage (6) at the front end of the currently spliced section, and enabling each prestressed tendon section to be arranged along the longitudinal extension direction of the construction pipe gallery.
5. The construction method of the corrugated steel pipe culvert according to claim 1 or 2, characterized in that: the upper surface of the filling layer (15) is a horizontal plane; lanes for vehicles to walk are laid on the soil filling layer (15), and the number of the lanes is multiple;
the longitudinal lengths of the plurality of pipe culvert splicing sections (1) in the pipe culvert body are the same;
before splicing construction of the next splicing section in the step A2, according to a formula
Minimum value of tensile force F to the prestressed tendon sectionmDetermining;
in formula (I), FMIs the positive pressure F of each pipe culvert splicing section (1) in the limit stateM＝γ0(γDND+γLNL) A (II); in formula (II), γ0Is the structural principal coefficient and gamma of the pipe culvert splicing section (1)0＝1.1，γDIs a constant load partial coefficient and gammaD＝1.2，γLIs a live load polynomial coefficient and gammaL1.4; a is the cross-sectional area of the pipe culvert splicing section (1) and the unit of the cross-sectional area is m2；
NDIs the corrugated steel pressure caused by the earth gravity and ND＝0.5(1.0-0.1Cs)AfW，NDHas the unit of kN/m, AfFor structural archingA soil pressure increase coefficient; w is the gravity of filling soil per linear meter above the pipe culvert splicing section (1) and the unit is kN/m, and W is gamma.Dh·(H+0.1075DV) Wherein gamma is the weight of the soil filled on the pipe culvert splicing section (1) and the unit of gamma is kN/m3，DhIs the effective span of the pipe culvert splicing section (1) and the unit is m, DVThe effective rise of the pipe culvert splicing section (1) is m, and the H is the filling height above the top of the pipe culvert splicing section (1) and the unit is m;
Csthe soil pressure reduction coefficient for considering the backfill property and the structure size
E is the elastic modulus of the corrugated steel plate used in the pipe culvert splicing section (1) and the unit is MPa, EsThe elastic modulus of the soil body filled with the soil on the pipe culvert splicing section (1) is MPa;
NLcorrugated steel pressure caused by vehicle load and NL＝0.5DhσL，NLThe unit of (a) is kN/m;
σLthe pressure of the vehicle load extending to the vault of the pipe culvert splicing section (1) is expressed by kN/m,
wherein μ is a vehicle impact expansion coefficient and μ is 0.4 (1.0-0.5H); a. thelThe total axle weight standard value of the vehicle arranged in the span range of the pipe culvert splicing section (1) is kN, and the unit of the total axle weight standard value is m, ltIs the size of the pipe culvert splicing section (1) after diffusion along the length direction of the lane and the unit of the size is m, mfIs a multilane reduction factor;
step A2 is along the longitudinal extension direction of the pipe culvert of being under construction by 2n of need stretch-draw to second concatenation section front end by back forward when the prestressing tendons section is stretched simultaneously, 2n of need stretch-draw of second concatenation section front end prestressing tendons section all the same and every the tensile force of prestressing tendons section is all not less than 2F allm；
When synchronously tensioning the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section from back to front in the longitudinal extension direction of the constructed pipe culvert in the step A4, the tensioning forces of the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are the same, and the tensioning force of each prestressed tendon section is not less than 2Fm；
All the pipe culvert splicing sections (1) in the pipe culvert body except the rear end splicing section, the front end splicing section and the second splicing section are middle splicing sections;
in the step A2, any one of the middle splicing section front end is required to be tensioned 2n ways from back to front along the longitudinal extension direction of the constructed pipe culvert when the prestressed tendon sections are synchronously tensioned, the middle splicing section front end is required to be tensioned 2n ways, the tensioning force of the prestressed tendon sections is the same and each waym。
6. The construction method of the corrugated steel pipe culvert according to claim 3, characterized in that: the front end and the rear end of each pipe culvert splicing section (1) are both a wave trough of the corrugated steel pipe, and the front end and the rear end of each pipe culvert splicing section (1) are symmetrically arranged; the pipe culvert splicing section (1) comprises a rear splicing section and is located, the front side of the rear splicing section is connected with the front splicing section connected with the rear splicing section, the front end of the rear splicing section is tightly attached to the rear end of the front splicing section, all the pipe culvert splicing sections (1) in the pipe culvert body are connected into a spliced corrugated steel pipe, and the front and the rear are adjacent to each other, and the joint between the pipe culvert splicing sections (1) is the position of a trough of the spliced corrugated steel pipe.
7. The construction method of the corrugated steel pipe culvert according to claim 6, characterized in that: an outer reinforcing ring (8) is sleeved on the outer side of the joint between the front and rear adjacent pipe culvert splicing sections (1), the outer reinforcing ring (8) is annular, the cross section of the outer reinforcing ring is arched, the outer reinforcing ring (8) is sleeved on the spliced corrugated steel pipe, and the inner side wall of the outer reinforcing ring (8) is tightly attached to the outer side wall of the spliced corrugated steel pipe; the longitudinal length of the outer reinforcing ring (8) is d1, the value range of d1 is 0.15 lambda-0.3 lambda, wherein lambda is the wave pitch of the corrugated steel pipe;
the outer reinforcing rings (8) are steel rings, each middle connecting ring (2) is sleeved on one outer reinforcing ring (8) and fixedly connected with the outer reinforcing ring (8), each middle connecting ring (2) and the outer reinforcing ring (8) fixed by the middle connecting ring are coaxially arranged, and the middle connecting rings and the outer reinforcing rings are arranged on the same cross section of the spliced corrugated steel pipe;
the rear end of the rear end splicing section is provided with a rear end reinforcing ring (9), the front end of the front end splicing section is provided with a front end reinforcing ring, and the rear end reinforcing ring (9) and the front end reinforcing ring are identical in structure and size and are symmetrically arranged; the rear end reinforcing ring (9) is hooped outside the rear end of the spliced corrugated steel pipe, and the front end reinforcing ring is hooped outside the front end of the spliced corrugated steel pipe; the inner side walls of the rear end reinforcing ring (9) and the front end reinforcing ring are tightly attached to the outer side wall of the spliced corrugated steel pipe at the position where the rear end reinforcing ring and the front end reinforcing ring are located, and the rear end reinforcing ring (9) and the front end reinforcing ring are welded and fixed on the spliced corrugated steel pipe; the rear end reinforcing ring (9) and the front end reinforcing ring are both steel rings and are both circular rings, and the longitudinal length of the rear end reinforcing ring (9) is half of that of the outer reinforcing ring (8);
the rear end connecting ring (3) is sleeved on the rear end reinforcing ring (9) and fixedly connected with the rear end reinforcing ring, the rear end connecting ring (3) and the rear end reinforcing ring (9) are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe, and the rear end surfaces of the rear end connecting ring (3) and the rear end reinforcing ring (9) are flush with the rear end of the rear end splicing section;
the front end connecting ring is sleeved on the front end reinforcing ring and fixedly connected with the front end reinforcing ring, the front end connecting ring and the front end reinforcing ring are coaxially arranged and arranged on the same cross section of the spliced corrugated steel pipe, and the front end surfaces of the front end connecting ring and the front end reinforcing ring are flush with the front end of the front end splicing section;
the rear end reinforcing ring (9), the front end reinforcing ring and the outer reinforcing ring (8) are formed by splicing a plurality of arc-shaped connecting sections, the arc-shaped connecting sections are distributed on the same vertical surface along the circumferential direction, and every two adjacent arc-shaped connecting sections are fixedly connected in a welding mode;
in the step A1, before welding and fixing the rear end connecting ring (3) at the rear end of the rear end splicing section, firstly welding and fixing a rear end reinforcing ring (9) at the outer side of the rear end splicing section, and then welding and fixing the rear end connecting ring (3) on the rear end reinforcing ring (9);
in the step a4, before the front end of the front end splicing section is welded and fixed with the front end connecting ring, the front end reinforcing ring is welded and fixed at the front end of the front end splicing section, and then the front end connecting ring is welded and fixed on the front end reinforcing ring;
before splicing the plurality of arc-shaped splicing sections forming the middle connecting ring (2) in the step A2, splicing the plurality of arc-shaped connecting sections forming the outer reinforcing ring (8) to obtain a spliced outer reinforcing ring (8); and then a plurality of arc splicing sections forming the middle connecting ring (2) are spliced on the outer reinforcing ring (8).
8. The construction method of the corrugated steel pipe culvert according to claim 7, characterized in that: an inner reinforcing ring (14) is arranged on the inner side of each steel connecting ring, the inner reinforcing rings (14) are circular and sleeved in the spliced corrugated steel pipe, and the outer side walls of the inner reinforcing rings (14) are tightly attached to the inner side walls of the spliced corrugated steel pipe; the longitudinal length of the inner reinforcing ring (14) is d2, and the value range of d2 is 0.08 lambda-0.2 lambda; each inner reinforcing ring (14) and the steel connecting ring positioned at the outer side of the inner reinforcing ring are coaxially arranged and are uniformly distributed on the same cross section of the spliced corrugated steel pipe;
the inner reinforcing ring (14) is a steel ring, and the inner reinforcing ring (14) and the spliced corrugated steel pipe are welded and fixed into a whole;
after splicing construction of the rear end splicing section in the step A1 is completed, erecting an inner reinforcing ring (14) on the inner side of the rear end splicing section, and supporting the inner reinforcing ring (14) in the rear end splicing section;
step A4, after the front end splicing section with the front end connecting mechanism is moved to the right position, an inner reinforcing ring (14) is erected on the inner side of the front end splicing section, the inner reinforcing ring (14) is supported in the front end splicing section, and then 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are synchronously tensioned from back to front along the longitudinal extension direction of a constructed pipe culvert;
when the next splicing section is spliced in the step A2, an inner reinforcing ring (14) is erected on the inner side of the front end of the rear-side spliced section, and the inner reinforcing ring (14) is supported in the rear-side spliced section; then, the current spliced section is moved to the right position by adopting hoisting equipment, the rear end of the hoisted current spliced section is clung to the front end of the rear spliced section, and an inner reinforcing ring (14) erected in the step is supported on the inner side of the joint between the current spliced section and the rear spliced section; thereafter, an intermediate connection mechanism is installed at the connection between the currently spliced section and the rear spliced section.
9. The construction method of the corrugated steel pipe culvert according to claim 7, characterized in that: an annular water stop belt (13) is clamped between the bottom of the outer reinforcing ring (8) and the spliced corrugated steel pipe, and the annular water stop belt (13) is annular;
before a plurality of arc-shaped connecting sections forming the outer reinforcing ring (8) are spliced in the step A2, an annular water stop belt (13) is arranged outside the connecting position between the current spliced section and the rear spliced section.
10. The construction method of the corrugated steel pipe culvert according to claim 7, characterized in that: the position of the anchor (6) fixed on the middle connecting ring (2) is a longitudinal position to be reinforced, each longitudinal position to be reinforced is provided with a longitudinal reinforcing structure, each longitudinal reinforcing structure and one anchor (6) are arranged on the same plane, and each longitudinal reinforcing structure is arranged along the longitudinal extension direction of the constructed pipe culvert;
each longitudinal reinforcing structure comprises two longitudinal reinforcing plates (10) symmetrically arranged on the front side and the rear side of the middle connecting ring (2), each longitudinal reinforcing plate (10) is a straight steel plate, and the bottom of each longitudinal reinforcing plate (10) is fixed on the outer side wall of the outer reinforcing ring (8); two longitudinal reinforcing plates (10) in each longitudinal reinforcing structure are uniformly distributed on the same plane and are distributed along the longitudinal extension direction of the constructed pipe culvert; the longitudinal reinforcing structures on the same cross section of the spliced corrugated steel pipe are distributed along the circumferential direction, and each longitudinal reinforcing structure is vertically distributed with the outer reinforcing ring (8) fixed by the longitudinal reinforcing structure; one side wall of the longitudinal reinforcing plate (10) is a vertical side wall and is fixed on the middle connecting ring (2), the other side wall of the longitudinal reinforcing plate (10) is supported on the outer side wall of the spliced corrugated steel pipe, and the other side wall of the longitudinal reinforcing plate (10) is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position; the upper part of the longitudinal reinforcing plate (10) is a horizontal plane, and the upper part of the longitudinal reinforcing plate is flush with the outer side wall of the fixed middle connecting ring (2);
the position of the rear end connecting ring (3) for fixing the anchorage device (6) is a rear end to-be-reinforced position, each rear end to-be-reinforced position is provided with a rear end reinforcing plate (11), the structure of each rear end reinforcing plate (11) is the same as that of the longitudinal reinforcing plate (10), each rear end reinforcing plate (11) is a straight steel plate, and the bottom of each rear end reinforcing plate is fixed on the outer side wall of the rear end reinforcing ring (9); the rear end reinforcing plate (11) is arranged along the longitudinal extension direction of the constructed pipe culvert; the rear end reinforcing plates (11) on the spliced corrugated steel pipe are distributed along the circumferential direction, and each rear end reinforcing plate (11) is vertically distributed with the rear end reinforcing ring (9) fixed by the rear end reinforcing plate; the rear side wall of the rear end reinforcing ring (9) is a vertical side wall and is fixed on the rear end connecting ring (3), the front side wall of the rear end reinforcing ring (9) is supported on the outer side wall of the spliced corrugated steel pipe, and the front side wall of the rear end reinforcing ring (9) is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position; the upper part of the rear end reinforcing ring (9) is a horizontal plane and the upper part of the rear end reinforcing ring is flush with the outer side wall of the fixed rear end connecting ring (3);
the position of the anchorage device (6) fixed on the front end connecting ring is a front end to-be-reinforced position, a front end reinforcing plate is arranged on each front end to-be-reinforced position, the structures and the sizes of the front end reinforcing plate and the rear end reinforcing plate (11) are the same, the front end reinforcing plate is a straight steel plate, and the bottom of the front end reinforcing plate is fixed on the outer side wall of the front end reinforcing ring; the front end reinforcing plate is arranged along the longitudinal extension direction of the constructed pipe culvert; the front end reinforcing plates are arranged along the circumferential direction, and each front end reinforcing plate is vertically arranged with the front end reinforcing ring fixed by the front end reinforcing plate; the front side wall of the front end reinforcing ring is a vertical side wall and is fixed on the front end connecting ring, the rear side wall of the front end reinforcing ring is supported on the outer side wall of the spliced corrugated steel pipe, and the rear side wall of the front end reinforcing ring is tightly attached to the outer side wall of the spliced corrugated steel pipe at the supporting position of the front end reinforcing ring; the upper portion of the front end reinforcing ring is a horizontal plane and the upper portion of the front end reinforcing ring is flush with the outer side wall of the fixed front end connecting ring.
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| CN113202511A (en) * | 2021-06-03 | 2021-08-03 | 上海市城市建设设计研究总院（集团）有限公司 | Bearing bundle type underground space underground excavation calandria support without intermediate wall and construction method |
| CN115094795A (en) * | 2022-07-13 | 2022-09-23 | 正平路桥建设股份有限公司 | Buried corrugated steel box culvert canal and construction method thereof |
| CN115419252B (en) * | 2022-09-08 | 2023-09-08 | 南通润邦海洋工程装备有限公司 | Pre-lapping method for tubular pile tool scaffold |
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