CN110629792B

CN110629792B - Splicing construction method for corrugated steel pipe gallery

Info

Publication number: CN110629792B
Application number: CN201910915785.8A
Authority: CN
Inventors: 李元庆; 蒲广宁; 甘迎新; 辛有忠; 张明春; 赵怀忠; 韩馨; 韩丽娟; 梁俊伟; 郭昆; 李捷; 许江波; 宋方华
Original assignee: Haidong Zhengping Pipe Corridor Facility Manufacturing Co ltd; Qinghai Lantu Highway Survey And Design Co ltd; Qinghai Lutuo Engineering Facilities Manufacturing Group Co ltd; Zhengping Construction Engineering Co ltd; Zhengping Road And Bridge Construction Co ltd
Current assignee: Haidong Zhengping Pipe Corridor Facility Manufacturing Co ltd; Qinghai Lantu Highway Survey And Design Co ltd; Qinghai Lutuo Engineering Facilities Manufacturing Group Co ltd; Zhengping Construction Engineering Co ltd; Zhengping Road And Bridge Construction Co ltd
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2021-06-15
Anticipated expiration: 2039-09-26
Also published as: CN110629792A

Abstract

The invention discloses a splicing construction method of a corrugated steel pipe gallery, which is used for respectively splicing a plurality of splicing sections of the pipe gallery 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 gallery 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 gallery, 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 gallery splicing sections, and integrally reinforces all the pipe gallery splicing sections in the pipe gallery 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

Splicing construction method for corrugated steel pipe gallery

Technical Field

The invention belongs to the technical field of pipe gallery construction, and particularly relates to a splicing construction method of a corrugated steel pipe gallery.

Background

Pipe gallery, i.e. the corridor of the pipeline. 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.

Corrugated steel structure piping lane is whole corrugated steel pipe (pipe diameter < 3m) or assembles fashioned pipe by polylith corrugated steel plate, compares with cast-in-place piping lane 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; fifth, the presence of the corrugations increases the cross-sectional stiffness of the tube lane structure. At present, the corrugated steel structure pipe gallery has been widely applied to municipal works 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.

But in the actual use process, the following defect exists in corrugated steel structure piping lane: 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 is poor in durability and stress performance, especially a long-distance large-pipe-diameter splicing type pipe gallery is poor in integrity and stress performance, a plurality of damaged parts can be unavoidably generated, and later-stage maintenance workload is large.

Disclosure of Invention

The invention aims to solve the technical problems in the prior art and provides a splicing construction method of a corrugated steel pipe gallery, which has the advantages of simple steps, reasonable design, simple and convenient construction and good use effect, wherein a prestress reinforcing structure is adopted to carry out sectional type integral reinforcement on the spliced corrugated steel pipe gallery, the structure and the arrangement position of each prestress rib group in the prestress reinforcing structure are limited, the prestress reinforcing is synchronously carried out in a sectional type in the splicing process of the pipe gallery splicing sections, and all the pipe gallery splicing sections in a pipe gallery 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, the durability of the pipe gallery can be effectively prolonged, and the method is particularly suitable for long-distance large-diameter spliced pipe galleries.

In order to solve the technical problems, the invention adopts the technical scheme that: the splicing construction method of the corrugated steel pipe gallery is characterized by comprising the following steps of: the constructed pipe gallery is a corrugated steel pipe gallery; the corrugated steel pipe gallery comprises a pipe gallery body formed by splicing a plurality of pipe gallery splicing sections and a prestress reinforcing structure arranged on the outer side of the pipe gallery body, wherein the pipe gallery body is horizontally arranged, and the plurality of pipe gallery splicing sections are arranged on the same straight line from back to front along the longitudinal extension direction of a constructed pipe gallery; each pipe gallery splicing section is a corrugated steel pipe which is horizontally arranged and has a circular cross section, the pipe diameters of the pipe gallery 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 gallery body are the same; one of the plurality of pipe gallery splicing sections located at the rearmost side is a rear end splicing section, and one of the plurality of pipe gallery splicing sections located at the foremost side is a front end splicing section; the front and rear adjacent pipe gallery 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 gallery splicing sections positioned at the rear side of the pipe gallery body are respectively the rear end splicing section, the second splicing section and the 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 gallery splicing section is a front side connecting ring, and the steel connecting ring on the rear side of each pipe gallery splicing section is a rear side connecting ring;

the prestressed reinforcement structure comprises two prestressed reinforcement structures which are symmetrically arranged on the left and right, each prestressed reinforcement structure comprises n prestressed tendon groups which are arranged on the outer side of the pipe gallery body from top to bottom, and the n prestressed tendon groups are identical in structure and are arranged along the longitudinal extension direction of the constructed pipe gallery; 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 gallery, 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 gallery splicing section through one anchorage device, and the prestressed tendon section fixed on the rear connecting ring of each pipe gallery splicing section is the prestressed tendon section fixed at the rear end of the pipe gallery splicing section;

the front end of each prestressed tendon section is arranged on the front side connecting ring of one pipe gallery splicing section through one anchorage device, and the prestressed tendon section arranged on the front side connecting ring of each pipe gallery splicing section is the prestressed tendon section to be tensioned at the front end of the pipe gallery splicing section;

all the pipe gallery splicing sections except the front end splicing section and the rear end splicing section in the pipe gallery 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 gallery 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 splicing pipe gallery, and each two-section type splicing pipe gallery is formed by splicing two pipe gallery splicing sections which are adjacent to each other in the front and at the 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 gallery body form a two-section tensioning prestressed reinforcing group for integrally reinforcing the two-section splicing 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 gallery body;

it is right when corrugated steel pipe gallery carries out the concatenation construction, longitudinal extension direction along the pipe gallery of being under construction is by preceding a plurality of to the back the construction is spliced respectively to pipe gallery concatenation section, including following step:

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 gallery;

step A2, splicing construction of the next splicing section: adopting hoisting equipment to move the next splicing section of the pipe gallery in place, enabling the rear end of the 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 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 gallery;

the current spliced section is a pipe gallery spliced section spliced in the step, and the rear-side spliced section is a pipe gallery spliced section 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 gallery;

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 gallery splicing sections positioned at the rear side of the front end connecting section in the pipe gallery 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 gallery to finish the splicing construction process of the constructed pipe gallery;

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 gallery splicing sections adjacent to the front end connecting ring in the pipe gallery body;

before 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are synchronously tensioned, the front ends of the 2n prestressed tendon sections are respectively installed on one anchorage device at the front end of the front end splicing section.

The splicing construction method of the corrugated steel pipe gallery 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 splicing construction method of the corrugated steel pipe gallery 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 splicing construction method of the corrugated steel pipe gallery 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, 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.

The splicing construction method of the corrugated steel pipe gallery is characterized by comprising the following steps: a soil filling layer is distributed on the corrugated steel pipe gallery, and the upper surface of the soil 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 gallery splicing sections in the pipe gallery 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 section_mDetermining;

in formula (I), F_MFor each in extreme condition positive pressure and F of the pipe gallery splicing section_M＝γ₀(γ_DN_D+γ_LN_L) A (II); in formula (II), γ₀Structural dominance coefficient and gamma for pipe gallery splicing section₀＝1.1，γ_DIs a constant load partial coefficient and gamma_D＝1.2，γ_LIs a live load polynomial coefficient and gamma_L1.4; a is the cross-sectional area of the splicing section of the pipe gallery and the unit of the cross-sectional area is m²；

N_DIs the corrugated steel pressure caused by the earth gravity and N_D＝0.5(1.0-0.1C_s)A_fW，N_DHas the unit of kN/m, A_fSoil pressure build-up to account for structural arching effectsA coefficient; w is the gravity of filling soil per linear meter above the splicing section of the pipe gallery and the unit is kN/m, W is gamma.D_h·(H+0.1075D_V) Wherein gamma is the weight of the soil filled on the splicing section of the pipe gallery and the unit of gamma is kN/m³，D_hFor effective span of the pipe gallery splicing section and unit thereof is m, D_VThe effective rise of the pipe gallery splicing section is m, and the unit of the effective rise is H;

C_sthe 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 gallery and the unit is MPa, E_sThe elastic modulus of the soil body filled with the soil on the splicing section of the pipe gallery is MPa;

N_Lcorrugated steel pressure caused by vehicle load and N_L＝0.5D_hσ_L，N_LThe unit of (a) is kN/m;

σ_Lfor the pressure of the vehicle load extending to the vault of the pipe gallery splice and in kN/m,

wherein μ is a vehicle impact expansion coefficient and μ is 0.4 (1.0-0.5H); a. the_lFor total axle weight standard value and its unit of arranging the vehicle in piping lane splice section span scope are kN, and w is the size and its unit after spreading along the lane width direction on the piping lane splice section and is m, l_tFor the size after spreading along lane length direction on the piping lane splicing section and the unit is m, m_fIs a multilane reduction factor;

follow the longitudinal extension direction of the pipe gallery of being under construction in step A2 by 2n way that need stretch-draw to second concatenation section front end forward the prestressing tendons section when carrying out the stretch-draw in step, 2n way that need stretch-draw of second concatenation section front end prestressing tendons section's tensile force is all the same and every the tensile force of prestressing tendons section is all not less than 2F all_m；

Step A4 is carried out along the longitudinal extension direction of the constructed pipe galleryWhen 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, the tension force of the 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section is the same, and the tension force of each prestressed tendon section is not less than 2F_m；

All the pipe gallery splicing sections in the pipe gallery body except the rear end splicing section, the front end splicing section and the second splicing section are middle splicing sections;

follow the longitudinal extension direction of the piping lane of being under construction by backward to preceding any in step A2 the middle part splicing section front end need 2n of stretch-draw when the prestressing tendons segmentation is carried out the stretch-draw in step A, the middle part splicing section front end need 2n of stretch-draw the equal same and every of tensile force of prestressing tendons segmentation the tensile force of prestressing tendons segmentation is all not less than F all_m。

The splicing construction method of the corrugated steel pipe gallery is characterized by comprising the following steps: the front end and the rear end of each pipe gallery splicing section are both a wave trough of the corrugated steel pipe, and the front end and the rear end of each pipe gallery splicing section are symmetrically arranged; adjacent two around the piping lane splice section include back splice section and be located back splice section front side and with the preceding splice section that back splice section is connected, the front end of back splice section with the rear end of preceding splice section is hugged closely, all piping lane splice sections connect into a concatenation formula corrugated steel pipe in the piping lane body, and adjacent two around the junction between the piping lane splice section is a trough position of concatenation formula corrugated steel pipe.

The splicing construction method of the corrugated steel pipe gallery 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 gallery 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 splicing construction method of the corrugated steel pipe gallery 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 gallery;

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 splicing construction method of the corrugated steel pipe gallery 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 splicing construction method of the corrugated steel pipe gallery 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 gallery;

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 gallery; 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 gallery; 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 gallery; 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 gallery has reasonable structural design, simple and convenient processing, manufacture and on-site assembly and lower investment and construction cost.

2. The external prestressing force reinforcement structure of the adopted prestressing force processing structure as the pipe gallery body has the following advantages: first, reinforcement: the splicing sections of the pipe gallery body are integrally reinforced, so that the integrity and the stress performance of the pipe gallery body can be effectively improved, and the durability of the pipe gallery is correspondingly and effectively prolonged; secondly, unloading: the load acting on the pipe gallery body can be effectively reduced or even eliminated, and the structural stability and the use effect of the pipe gallery body are further ensured; and thirdly, the internal force of the structure is changed, and the stress performance and the bearing performance of the pipe gallery body are effectively improved. Simultaneously, the prestressing force reinforcement structure is located the piping lane body outside, can not cause any harmful effects to corrugated steel piping lane's performance, especially can not influence corrugated steel piping lane's adaptability, corrugated steel piping lane has the ability that adapts to ground and basic deformation, avoids the structural damage problem because of the uneven settlement of foundation leads to. In addition, the prestress reinforcement structure can effectively exert the advantages of a 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 gallery, ensure the structural stability and the integrity of the corrugated steel pipe gallery and fully exert the advantages of the corrugated steel pipe gallery.

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 piping lane body to its position department, ensure the structure steadiness of piping lane body, through steel connect the ring to piping lane body front end, these atress weak areas of junction between adjacent two piping lane concatenation sections around and piping lane body rear end effectively consolidate. Connect in the middle go-between two adjacent pipe gallery splice sections around carry out effective connection to two adjacent pipe gallery splice sections around, can be adjacent two around effectively the junction between the pipe gallery splice section is consolidated effectively, can effectively overcome and can be adjacent two around in the pipe gallery body the junction atress between the pipe gallery splice section is weak, yielding scheduling problem. In addition, the steel connecting ring hoop is in on the piping lane body, it is right when the piping lane body carries out radial reinforcement, the position can not be motionless after the simple and convenient and suit of actual suit, can not take place longitudinal displacement, and the result of use is stable, 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 vertical power transmission plate that adopts simple structure, processing is simple and convenient and the input cost is lower, the site operation is simple and convenient, excellent in use effect, will apply in concatenation formula corrugated steel pipe front end through vertical power transmission plate, the oblique internal force dispersion on the junction between concatenation formula corrugated steel pipe rear end and two adjacent piping lane concatenation sections transmits other regions to concatenation formula corrugated steel pipe, thereby can effectively reduce and act on concatenation formula corrugated steel pipe front end, the effort of junction between concatenation formula corrugated steel pipe rear end and two adjacent piping lane concatenation sections, the structural stability and the result of use of junction between both ends and two adjacent piping lane concatenation sections around the concatenation formula corrugated steel pipe 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 gallery, and can ensure the use effect and the use performance of the constructed and formed corrugated steel pipe gallery.

In conclusion, the invention has the advantages of reasonable design, simple and convenient construction and good use effect, the spliced corrugated steel pipe gallery is reinforced in a sectional type integrally 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 type in the splicing process of the pipe gallery splicing sections, and all the pipe gallery splicing sections in the pipe gallery body are reinforced integrally by 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 showing a pipe gallery in which the present invention is applied in a spread state.

Fig. 2 is a schematic cross-sectional structure view of the rear end of a pipe gallery in which the present invention is applied.

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 longitudinal section structure view of the rear end of a pipe gallery constructed by the invention.

FIG. 8 is a schematic longitudinal section structure diagram of the position of an anchor at the joint between two adjacent pipe gallery splicing sections according to the present invention.

Fig. 9 is a schematic longitudinal section structure diagram of the position of the guide seat at the joint between the front and rear adjacent pipe gallery splicing sections.

Fig. 10 is a schematic diagram of the arrangement positions of the corrugated steel pipe gallery and the filling layer formed by construction according to the invention.

Fig. 11 is a schematic diagram of the arrangement position of the annular water stop at the joint between two adjacent pipe gallery splicing sections.

FIG. 12 is a flow chart of a splicing construction method of the present invention.

Description of reference numerals:

1-splicing sections of pipe galleries; 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 layer.

Detailed Description

As shown in fig. 12, in the splicing construction method for the corrugated steel pipe gallery, the constructed pipe gallery is the corrugated steel pipe gallery; with reference to fig. 1, 2, 3, 4, 5, 7, 8 and 9, the corrugated steel pipe gallery comprises a pipe gallery body formed by splicing a plurality of pipe gallery splicing sections 1 and a prestress reinforcing structure arranged on the outer side of the pipe gallery body, wherein the pipe gallery body is horizontally arranged, and the plurality of pipe gallery splicing sections 1 are arranged on the same straight line from back to front along the longitudinal extension direction of the pipe gallery under construction; each pipe gallery splicing section 1 is a corrugated steel pipe which is horizontally arranged and has a circular cross section, the pipe diameters of the pipe gallery 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 gallery body are the same; one of the plurality of pipe gallery splicing sections 1 located at the rearmost side is a rear end splicing section, and one of the plurality of pipe gallery splicing sections 1 located at the foremost side is a front end splicing section; the front and rear adjacent pipe gallery splicing sections 1 are connected through an intermediate connecting ring 2, the intermediate connecting ring 2 and the pipe gallery 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 are vertically arranged steel connecting rings; the three pipe gallery splicing sections 1 positioned at the rear side of the pipe gallery body are respectively the rear end splicing section, the second splicing section and the 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 gallery splicing section 1 is a front side connecting ring, and the steel connecting ring positioned on the rear side of each pipe gallery splicing section 1 is a rear side connecting ring; the five pipe gallery splicing sections 1 positioned on the rear side of the pipe gallery 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;

the prestressed reinforcement structure comprises two prestressed reinforcement structures which are symmetrically arranged on the left and right, each prestressed reinforcement structure comprises n prestressed tendon groups which are arranged on the outer side of the pipe gallery body from top to bottom, and the n prestressed tendon groups are identical in structure and are arranged along the longitudinal extension direction of the constructed pipe gallery; 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 gallery, 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 gallery splicing section 1 through one anchorage device 6, and the prestressed tendon section fixed on the rear connecting ring of each pipe gallery splicing section 1 is the prestressed tendon section fixed at the rear end of the pipe gallery splicing section 1;

the front end of each prestressed tendon section is arranged on the front connecting ring of one pipe gallery splicing section 1 through one anchorage device 6, and the prestressed tendon section arranged on the front connecting ring of each pipe gallery splicing section 1 is the prestressed tendon section to be tensioned at the front end of the pipe gallery splicing section 1;

all the pipe gallery splicing sections 1 except the front end splicing section and the rear end splicing section in the pipe gallery 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 gallery 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 gallery 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 splicing pipe gallery, and each two-section type splicing pipe gallery is formed by splicing two pipe gallery splicing sections 1 adjacent to each other in the front and at the 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;

it is right that all straight prestressing tendons segment 5 that lay on same vertical face in the piping lane body constitute 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 piping lane body.

The prestress reinforcing structure is an external prestress reinforcing structure on the outer side of the pipe gallery 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 gallery body has the following advantages that: first, reinforcement: integrally reinforcing a plurality of pipe gallery splicing sections 1 in the pipe gallery body, effectively improving the integrity and the stress performance of the pipe gallery body, and correspondingly effectively prolonging the durability of the pipe gallery; secondly, unloading: the load acting on the pipe gallery body can be effectively reduced or even eliminated, and the structural stability and the use effect of the pipe gallery body are further ensured; and thirdly, the internal force of the structure is changed, and the stress performance and the bearing performance of the pipe gallery body are effectively improved. Simultaneously, the prestressing force reinforcement structure is located the piping lane body outside can not cause any harmful effects to corrugated steel piping lane's performance, especially can not influence corrugated steel piping lane's adaptability, corrugated steel piping lane has the ability that adapts to ground and basis deformation, avoids the structural damage problem because of the uneven settlement of foundation basis leads to. The prestress reinforcing structure can effectively exert the advantages of a prestress reinforcing method, fully exert the triple effects of reinforcing, unloading and changing the structural internal force of the prestress reinforcing method, ensure and promote the full exertion of the advantages and the performance of the corrugated steel pipe gallery, ensure the structural stability and the integrity of the corrugated steel pipe gallery and fully exert the advantages of the corrugated steel pipe gallery.

Especially to long distance's big pipe diameter piping lane, through prestressing force reinforcement structure makes the construction of long distance, big pipe diameter piping lane be known as probably, can effectively enlarge corrugated steel piping lane's application scope, effective increase corrugated steel piping lane's pipe diameter to can effectively increase corrugated steel piping lane's longitudinal length. 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 gallery splicing section 1 can be synchronously prestressed and reinforced in a segmented manner in the splicing process, and the straight prestressed tendon sections 5 outside the front and rear adjacent pipe gallery splicing sections 1 are mutually staggered and matched for use, thereby realizing the purpose of integrally reinforcing all the pipe gallery splicing sections 1 in the pipe gallery body, effectively improving the prestressed reinforcement effect of the corrugated steel pipe gallery, and each pipe gallery splicing section 1 in the corrugated steel pipe gallery has the segmented prestressed reinforcement effect, and whole piping lane body has whole reinforcing effect, can full play the reinforcing effect of prestressing force reinforcement structure to site operation is simple and convenient.

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 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 gallery 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 gallery splicing section 1 can be adjusted correspondingly according to specific requirements. Wherein, 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 gallery 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 gallery 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 piping lane body, ensure the structure steadiness of piping lane body, through the steel connecting ring is right piping lane body front end adjacent two around piping lane body rear end these atress weak areas of junction between the piping lane concatenation section 1 effectively consolidate. Connect in adjacent two around the centre go-between 2 between the piping lane splice section 1 is adjacent two around the piping lane splice section 1 carries out effective connection in, can be adjacent two around effectively the junction between the piping lane splice section 1 is consolidated, can effectively overcome adjacent two around in the piping lane body junction atress between the piping lane splice section 1 is weak, yielding scheduling problem. In addition, the steel connecting ring hoop is in on the piping lane body, it is right when radial reinforcement is carried out to the piping lane body, the position can not be motionless after the simple and convenient and suit of actual suit, can not take place longitudinal displacement, and the result of use is stable, reliable.

It is right when corrugated steel pipe gallery carries out the concatenation construction, longitudinal extension direction along the pipe gallery of being under construction is by preceding a plurality of to the back the construction is spliced respectively to pipe gallery concatenation section 1, including following step:

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 gallery;

step A2, splicing construction of the next splicing section: adopting hoisting equipment to move the next pipe gallery splicing section 1 in place, enabling the rear end of the 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 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 gallery;

the current spliced section is a pipe gallery spliced section 1 spliced in the step, and the rear-side spliced section is a pipe gallery spliced section 1 which is located on 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, 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 gallery;

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 gallery splicing sections 1 positioned at the rear side of the front end connecting section in the pipe gallery body is completed;

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 gallery splicing sections 1 adjacent to the front end connecting ring in the pipe gallery body;

before 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are synchronously tensioned, the front ends of the 2n prestressed tendon sections are respectively installed on one anchorage device 6 at the front end of the front end splicing section.

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, the rear end of the rear-end tendon segment of one of the combined tendons 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 the rear end of the rear-end tendon segment of one of the combined tendons 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;

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 gallery splicing section 1 are a wave trough of the corrugated steel pipe, and both the front and rear ends of each pipe gallery splicing section 1 are symmetrically arranged; adjacent two around pipe gallery concatenation section 1 includes back concatenation section and is located back concatenation section front side and with the preceding concatenation section that back concatenation section is connected, the front end of back concatenation section with the rear end of preceding concatenation section is hugged closely, all pipe gallery concatenation sections 1 connect into a concatenation formula corrugated steel pipe in the pipe gallery body, and adjacent two around the junction between pipe gallery concatenation section 1 is a trough position of concatenation formula corrugated steel pipe.

Because every both ends are around piping lane concatenation section 1 a trough of corrugated steel pipe makes adjacent two around like this junction between the piping lane 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 gallery splicing sections 1, an outer reinforcing ring 8 is sleeved outside the joint between the front and rear adjacent pipe gallery splicing sections 1, the area where each intermediate connecting ring 2 is located is an area to be reinforced, and the area 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 actual use, the junction between two adjacent front and back pipe gallery splicing sections 1 is further reinforced through the outer reinforcing ring 8 while being reinforced through the middle connecting ring 2. 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 junction carries out the shutoff ring of shutoff between the piping lane splicing section 1, can further increase adjacent two around the increase the tightness of junction between the piping lane splicing 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, outer reinforcing ring 8 is a ring type shutoff piece, can be to adjacent two around the junction between piping lane splicing section 1 carries out comprehensive shutoff, stops any seepage probably. Compared with the conventional water stop strip arranged at the joint between the two adjacent pipe gallery splicing sections 1 in the front and at the back, the traditional water stop strip is only arranged between the two adjacent pipe gallery splicing sections 1, and 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 gallery 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 gallery 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 gallery 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;

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; simultaneously, because the outside adds the hoop with need not to carry out fixed connection between the concatenation formula corrugated steel pipe, consequently on-the-spot assembly is simple and convenient to concatenation efficiency of construction is high, and construction period is short, can effectively solve the interface position that current concatenation formula corrugated steel piping lane exists and connect complicated, interface position damage and seepage scheduling problem easily appear. In addition, to every 5 rear ends of all straight prestressing tendons segments in the 1 outside of piping lane 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 gallery;

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 two pipe gallery 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 gallery splicing sections 1 in the front and at the back, the traditional water stop strip is only arranged between the two adjacent pipe gallery splicing sections 1, and 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 gallery 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 gallery 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 pipe gallery under construction;

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 gallery; 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 gallery; 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 gallery; 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 of all straight prestressing tendons segments in the 1 outside of piping lane concatenation section are fixed and when carrying out stretch-draw to its front end, all through ground tackle 6 the steel connecting ring 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 piping lane 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 piping lane concatenation section 1, 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 piping lane 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, a soil filling layer 15 is disposed on the corrugated steel pipe gallery, and an upper surface of the soil 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 gallery splicing sections 1 in the pipe gallery body are the same;

in formula (I), F_MFor each in extreme condition positive pressure and F of the pipe gallery splicing section 1_M＝γ₀(γ_DN_D+γ_LN_L) A (II); in formula (II), γ₀For structural dominance coefficient and gamma of piping lane splicing section 1₀＝1.1，γ_DIs a constant load partial coefficient and gamma_D＝1.2，γ_LIs a live load polynomial coefficient and gamma_L1.4; a is the cross-sectional area of the pipe gallery splicing section 1 and the unit of the cross-sectional area is m²；

N_DIs heavy in soilForce induced corrugated steel pressure and N_D＝0.5(1.0-0.1C_s)A_fW，N_DHas the unit of kN/m, A_fThe 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 gallery splicing section 1 and the unit is kN/m, W is gamma.D_h·(H+0.1075D_V) Wherein gamma is the weight of the soil filled on the pipe gallery splicing section 1 and the unit of gamma is kN/m³，D_hFor effective span of the pipe gallery splicing section 1 and the unit thereof is m, D_VThe effective rise of the pipe gallery splicing section 1 is m, and the unit of the effective rise is H, and the unit of the filling height above the top of the pipe gallery splicing section 1 is m;

E is the elastic modulus of the corrugated steel plate used in the pipe gallery splicing section 1 and the unit thereof is MPa, E_sThe elastic modulus of the soil filled on the splicing section 1 of the pipe gallery is MPa;

σ_Lfor the pressure of the vehicle load extending to the dome of the pipe gallery splicing section 1 and having a unit of kN/m,

wherein μ is a vehicle impact expansion coefficient and μ is 0.4 (1.0-0.5H); a. the_lFor 1 span within range total axle weight standard value and its unit of arranging the vehicle of piping lane splice section 1 are kN, and w is the size and its unit of m, l after along lane width direction diffusion on the piping lane splice section 1_tFor the size after spreading along lane length direction on the piping lane splicing section 1 and the unit is m, m_fIs a multilane reduction factor;

step A2 is along the longitudinal extension direction of the pipe gallery of being under construction by 2n way that need stretch-draw to second splice section front end before the prestressing tendons section when stretching in step, 2n way that need stretch-draw of second splice section front end prestressing tendonsThe segments have the same tension and the tension of each prestressed tendon segment is not less than 2F_m；

In the step A4, the front end splicing section front end is tensioned from back to front along the longitudinal extension direction of the constructed pipe gallery 2n prestressed tendon sections are synchronously tensioned, the front end splicing section front end is tensioned 2n prestressed tendon sections with the same tension force and each prestressed tendon section with the tension force not less than 2F_m；

All the pipe gallery splicing sections 1 in the pipe gallery body except the rear end splicing section, the front end splicing section and the second splicing section are middle splicing sections;

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 field_fTotal axle weight standard value A of vehicle arranged in 1 span range of pipe gallery splicing section_lDimension w after diffusion along lane width direction on pipe gallery splicing section 1, dimension l after diffusion along lane length direction on pipe gallery splicing section 1_tAnd a multilane reduction factor m_fAnd the like. For the soil pressure increasing coefficient A considering the arching effect of the structure_fTotal axle weight standard value A of vehicle arranged in 1 span range of pipe gallery splicing section_lDimension w after diffusion along lane width direction on pipe gallery splicing section 1, dimension l after diffusion along lane length direction on pipe gallery splicing section 1_tAnd a multilane reduction factor m_fWhen the parameters are determined, the determination is carried out according to 'technical rules of corrugated steel comprehensive pipe gallery engineering' 2017, and the determination can also be carried out according to 'general standards for highway bridge and culvert design'.

In this embodiment, D_h＝D_V＝D。

In the actual use process, the minimum value F of the tension force of the prestressed tendon section is obtained_mConfirm, can carry out simple and convenient, quick and accurate the confirming to tension force to further ensure the reinforcement effect of prestressing force reinforcement structure, and maneuverability is strong, can effectively ensure the construction shaping corrugated steel pipe gallery's wholeness, atress performance and durability ensure the construction shaping corrugated steel pipe gallery's result of use. And, a minimum value F of the tensile force on the tendon segment_mThe determination method is reasonable in design and accurate in result, the filling layer 15 above the corrugated steel pipe gallery and the lane laying condition are comprehensively determined, and the finally determined tension force minimum value F_mAccording to the actual condition of the constructed pipe gallery, the minimum value F of the determined tension force can be ensured_mThe accuracy of (2).

For improving waterproof, anticorrosive effect, piping lane concatenation section 1 is galvanized steel concatenation section, outside reinforcing ring steel go-between and interior reinforcing ring are galvanized steel ring, vertical power transmission plate is galvanized steel sheet. 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 gallery 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

1. The splicing construction method of the corrugated steel pipe gallery is characterized by comprising the following steps of: the constructed pipe gallery is a corrugated steel pipe gallery; the corrugated steel pipe gallery comprises a pipe gallery body formed by splicing a plurality of pipe gallery splicing sections (1) and a prestress reinforcing structure arranged on the outer side of the pipe gallery body, wherein the pipe gallery body is horizontally arranged, and the plurality of pipe gallery splicing sections (1) are arranged on the same straight line from back to front along the longitudinal extension direction of a constructed pipe gallery; each pipe gallery splicing section (1) is a corrugated steel pipe which is horizontally arranged and has a circular cross section, the pipe diameters of the pipe gallery 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 gallery body are the same; one of the plurality of pipe gallery splicing sections (1) located at the rearmost side is a rear end splicing section, and one of the plurality of pipe gallery splicing sections (1) located at the foremost side is a front end splicing section; the front and rear adjacent pipe gallery 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 gallery splicing sections (1) positioned at the rear side of the pipe gallery 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 gallery splicing section (1) is a front side connecting ring, and the steel connecting ring positioned on the rear side of each pipe gallery splicing section (1) is a rear side connecting ring;

the prestressed reinforcement structure comprises two prestressed reinforcement structures which are symmetrically arranged on the left and right, each prestressed reinforcement structure comprises n prestressed tendon groups which are arranged on the outer side of the pipe gallery body from top to bottom, and the n prestressed tendon groups are identical in structure and are arranged along the longitudinal extension direction of the constructed pipe gallery; 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 gallery, 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 gallery splicing section (1) through one anchorage device (6), and the prestressed tendon section fixed on the rear connecting ring of each pipe gallery splicing section (1) is the prestressed tendon section fixed at the rear end of the pipe gallery splicing section (1);

the front end of each prestressed tendon section is arranged on the front side connecting ring of one pipe gallery splicing section (1) through one anchorage device (6), and the prestressed tendon section arranged on the front side connecting ring of each pipe gallery splicing section (1) is the prestressed tendon section to be tensioned at the front end of the pipe gallery splicing section (1);

all the pipe gallery splicing sections (1) except the front end splicing section and the rear end splicing section in the pipe gallery 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 gallery 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 gallery splicing sections (1) which are adjacent in the front and at the 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 gallery body form a two-section tensioning prestressed reinforcement 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 gallery body;

right when corrugated steel pipe gallery carries out the concatenation construction, longitudinal extension direction along the pipe gallery of being under construction is by a plurality of to preceding the concatenation construction is carried out respectively to pipe gallery concatenation section (1), including following step:

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 gallery;

step A2, splicing construction of the next splicing section: adopting hoisting equipment to move the next pipe gallery splicing section (1) to a proper position, enabling the rear end of the 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 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 gallery;

the current spliced section is a pipe gallery spliced section (1) spliced in the step, and the rear-side spliced section is a pipe gallery spliced section (1) which is located 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 gallery;

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 gallery splicing sections (1) positioned at the rear side of the front end connecting section in the pipe gallery body is completed;

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 section is a pipe gallery splicing section (1) adjacent to the front end connecting ring in the pipe gallery body;

before 2n prestressed tendon sections needing to be tensioned at the front end of the front end splicing section are synchronously tensioned, the front ends of the 2n prestressed tendon sections are respectively installed on one anchorage device (6) at the front end of the front end splicing section.

2. The splicing construction method of the corrugated steel pipe gallery according to claim 1, characterized in that: the inner diameter of the corrugated steel pipe is d, wherein the value range of d is

Wave height of the corrugated steel pipe

3. The splicing construction method of the corrugated steel pipe gallery 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 splicing construction method of the corrugated steel pipe gallery 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 splicing construction method of the corrugated steel pipe gallery according to claim 1 or 2, characterized in that: a soil filling layer (15) is distributed on the corrugated steel pipe gallery, and the upper surface of the soil 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 gallery splicing sections (1) in the pipe gallery body are the same;

in formula (I), F_MFor each in extreme condition positive pressure and F of the pipe gallery splicing section (1)_M＝γ₀(γ_DN_D+γ_LN_L) A (II); in formula (II), γ₀For structural dominance coefficient and gamma of the piping lane splicing section (1)₀＝1.1，γ_DIs a constant load partial coefficient and gamma_D＝1.2，γ_LIs a live load polynomial coefficient and gamma_L1.4; a is the cross-sectional area of the pipe gallery splicing section (1) and the unit of the cross-sectional area is m²；

N_DIs the corrugated steel pressure caused by the earth gravity and N_D＝0.5(1.0-0.1C_s)A_fW，N_DHas the unit of kN/m, A_fThe 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 gallery splicing section (1) and the unit is kN/m, and W is gamma.D_h·(H+0.1075D_V) Wherein gamma is the weight of the soil filled on the pipe gallery splicing section (1) and the unit of gamma is kN/m³，D_hIs the effective span of the pipe gallery splicing section (1) and the unit is m, D_VThe effective rise of the pipe gallery splicing section (1) is m, and the unit of the effective rise is H, and the unit of the filling height above the top of the pipe gallery splicing section (1) is m;

E is the elastic modulus of the corrugated steel plate used in the pipe gallery splicing section (1) and the unit of the elastic modulus is MPa, E_sSoil body elastic modulus and unit thereof for filling soil on pipe gallery splicing section (1)Is MPa;

σ_Lthe pressure of the vehicle load extending to the vault of the pipe gallery splicing section (1) is measured in kN/m,

wherein μ is a vehicle impact expansion coefficient and μ is 0.4 (1.0-0.5H); a. the_lFor total axle weight standard value and its unit that arrange the vehicle in piping lane splicing section (1) span scope are kN, and w is the size and its unit after spreading along the lane width direction on piping lane splicing section (1) and is m, l_tThe size of the pipe gallery splicing section (1) after diffusion along the length direction of the lane is m, m_fIs a multilane reduction factor;

All the pipe gallery splicing sections (1) except the rear end splicing section, the front end splicing section and the second splicing section in the pipe gallery body are middle splicing sections;

follow the longitudinal direction of extension of the piping lane of being under construction by backward to preceding any in step A2 the middle part splicing section front end need 2n of stretch-draw when the prestressing tendons festival section is stretched tension in step, the middle part splicing section front end need 2n of stretch-draw the prestressing tendons festival section stretch-draw force homogeneous phase and every the prestressing tendons section stretch-draw forceThe tensile force is not less than F_m。

6. The splicing construction method of the corrugated steel pipe gallery according to claim 3, characterized in that: the front end and the rear end of each pipe gallery splicing section (1) are both a wave trough of the corrugated steel pipe, and the front end and the rear end of each pipe gallery splicing section (1) are symmetrically arranged; adjacent two around piping lane concatenation section (1) include back concatenation section and be located back concatenation section front side and with the preceding concatenation section that back concatenation section is connected, the front end of back concatenation section with the rear end of preceding concatenation section is hugged closely, all piping lane concatenation sections (1) connect into a concatenation formula corrugated steel pipe in the piping lane body, adjacent two around junction between piping lane concatenation section (1) is a trough position of concatenation formula corrugated steel pipe.

7. The splicing construction method of the corrugated steel pipe gallery 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 gallery 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 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);

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 splicing construction method of the corrugated steel pipe gallery 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 gallery;

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 splicing construction method of the corrugated steel pipe gallery 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 splicing construction method of the corrugated steel pipe gallery 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 gallery;

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 gallery; 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 gallery; 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 gallery; 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.