CN210622820U - Tunnel assembled inverted arch structure - Google Patents
Tunnel assembled inverted arch structure Download PDFInfo
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- CN210622820U CN210622820U CN201921115543.2U CN201921115543U CN210622820U CN 210622820 U CN210622820 U CN 210622820U CN 201921115543 U CN201921115543 U CN 201921115543U CN 210622820 U CN210622820 U CN 210622820U
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Abstract
The utility model discloses a tunnel assembled inverted arch structure, which is formed by assembling a plurality of assembled inverted arches, wherein each tunnel steel arch comprises an arch part bracket, two side wall brackets and an inverted arch bracket, and the inverted arch bracket comprises two tunnel bottom steel arches; every pin assembled inverted arch all includes a tunnel bottom bearing structure and a concrete beam board, and tunnel bottom bearing structure includes two lateral part inverted arch prefabs and a middle part inverted arch prefab, and every lateral part inverted arch prefab all includes an arch prefab, and every inside bottom of arch prefab all is provided with a tunnel bottom steel bow member. The utility model has the advantages of reasonable design, the construction is simple and convenient and excellent in use effect, is connected tunnel bottom bearing structure and concrete beam board and forms the assembled invert to with tunnel bottom bearing structure and side wall support and hunch wall secondary lining fastening connection as an organic whole, save tunnel invert just prop up, invert two lining and invert backfill work progress, can shorten construction period, and can guarantee construction quality.
Description
Technical Field
The utility model belongs to the technical field of the tunnel construction, especially, relate to a tunnel assembled inverted arch structure.
Background
At present, China is a developing country, traffic is the life line of national economy, and China is a mountainous country, so that many railways and highways overcome terrain and elevation obstacles through tunnels, thereby improving technical indexes of routes, shortening route mileage and accelerating inter-regional contact. The safety of the tunnel structure becomes a bottleneck for the development of the traffic industry.
In actual construction, the tunnel structure is generally composed of arch rings, side walls, inverted arches, inverted arch filling and advance support systems. At present, the primary support, the secondary lining and the inverted arch backfill of the tunnel are all carried out by binding reinforcing steel bars on site and then casting concrete in situ, the method has the advantages of multiple construction procedures, lower degree of mechanization and difficult quality control, more importantly, the forming and stress lag of the cast-in-situ inverted arch is not consistent with the design construction principle of early sealing of the tunnel, the deformation and settlement of the excavated segment cannot be effectively controlled, and accidents such as primary support cracking, deformation, collapse, subsidence, grout pouring, mud pumping and the like are easily caused. In addition, due to the influences of concrete mixing, mold entering, tamping, maintenance, mold stripping and the like, cast-in-place concrete is prone to the phenomena of lining honeycomb, pitted surface, arch crown concrete pouring incompact and the like, and construction quality cannot be effectively guaranteed.
At present, component prefabrication is taken as an important mark of technical development in many countries, is a necessary trend of construction industrial technical development and tunnel mechanized construction, is also a main method for improving engineering quality and construction speed and reducing cost, and can really realize 'assembled rapid construction and uninterrupted rapid maintenance of traffic'. Therefore, how to rapidly construct an inverted arch to seal the tunnel structure into a ring as early as possible to form a stressed whole, thereby improving the safety and reliability in tunnel construction and operation is a troublesome problem in the current tunnel design construction.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, a tunnel assembled invert structure is provided, its structural design is reasonable, the construction is simple and convenient and excellent in use effect, be connected tunnel end bearing structure and concrete beam board and form the assembled invert, and with tunnel end bearing structure and side wall support and arch wall secondary lining fastening connection as an organic whole, save tunnel invert first, the construction process is backfilled to two linings of invert and invert, can effectively shorten construction period, and can effectively guarantee construction quality.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a tunnel assembled inverted arch structure which characterized in that: the tunnel construction system is formed by splicing a plurality of fabricated inverted arches, wherein the fabricated inverted arches have the same structure and are distributed from front to back along the longitudinal extension direction of a constructed tunnel;
the primary supporting structure of the constructed tunnel comprises a plurality of tunnel steel arches, the structures of the plurality of tunnel steel arches are the same, and the tunnel steel arches are arranged from front to back along the longitudinal extension direction of the constructed tunnel; each tunnel steel arch frame is positioned on one tunnel cross section of a constructed tunnel, each tunnel steel arch frame comprises an arch support for supporting a constructed tunnel arch, two side wall supports symmetrically connected below the left side and the right side of the arch support frame and an inverted arch support connected between the bottoms of the two side wall supports, the inner sides of the left side and the right side of the constructed tunnel are respectively provided with one side wall support, the arch support, the two side wall supports and the inverted arch support in each tunnel steel arch frame are uniformly distributed on the same tunnel cross section, and the arch support and the two side wall supports in each tunnel steel arch frame form an arch wall support for supporting an arch wall of the constructed tunnel; each inverted arch support comprises a left tunnel bottom steel arch and a right tunnel bottom steel arch which are symmetrically arranged, and the outer end of each tunnel bottom steel arch is fixedly connected with the bottom of the side wall support positioned on the outer side of the tunnel bottom steel arch;
the front and rear adjacent two fabricated inverted arches are fixedly connected through a plurality of longitudinal connecting pieces which are uniformly distributed on the cross section of the same tunnel; each fabricated inverted arch comprises a tunnel bottom supporting structure and a concrete beam plate supported on the tunnel bottom supporting structure, the tunnel bottom supporting structure and the concrete beam plate are horizontally arranged and have the same longitudinal length, and the tunnel bottom supporting structure and the concrete beam plate are arranged on the same tunnel cross section of the constructed tunnel; the tunnel bottom supporting structure comprises two side inverted arch prefabricated parts which are symmetrically arranged at the left side and the right side and a middle inverted arch prefabricated part connected between the two side inverted arch prefabricated parts, and the longitudinal lengths of the middle inverted arch prefabricated part and the two side inverted arch prefabricated parts are the same; the side inverted arch prefabricated members, the middle inverted arch prefabricated members and the concrete beam plate are all reinforced concrete prefabricated members, and the middle inverted arch prefabricated members are horizontally arranged and are positioned right below the concrete beam plate;
each assembled inverted arch is provided with one tunnel steel arch; each side inverted arch prefabricated part comprises an arch-shaped prefabricated part supported at the bottom of one side of the constructed tunnel, and the arch-shaped prefabricated part is a reinforced concrete prefabricated part; the inner side bottom of each arch prefabricated member is provided with one tunnel bottom steel arch, the outer end of each tunnel bottom steel arch extends out of the outer side of the arch prefabricated member where the tunnel bottom steel arch is located, the outer end of each tunnel bottom steel arch is provided with a steel arch extending section, and the steel arch extending section is fixedly connected with the bottom of the side wall support located on the outer side of the steel arch extending section; and the middle inverted arch prefabricated members in each assembled inverted arch are connected between the two arched prefabricated members which are symmetrically arranged left and right.
Above-mentioned tunnel assembled inverted arch structure, characterized by: the multiple assembled inverted arches are identical in structure and size and are uniformly distributed, and the multiple tunnel steel arches are identical in structure and size and are uniformly distributed;
and the distance between two adjacent fabricated inverted arches is the same as the distance between two adjacent tunnel steel arches.
Above-mentioned tunnel assembled inverted arch structure, characterized by: the outer side of the bottom of each side wall bracket is provided with a locking anchor pipe;
each fabricated inverted arch further comprises a concrete leveling layer paved on the concrete beam plate and an asphalt surface layer with one side paved on the concrete leveling layer.
Above-mentioned tunnel assembled inverted arch structure, characterized by: the inner side of the bottom of each side wall bracket is provided with a bottom connecting piece for connecting a tunnel bottom steel arch frame, and the bottom connecting pieces are I-shaped steel and are horizontally arranged; every the bottom connecting piece all welds as an organic wholely with the tunnel bottom steel bow member that is located its inboard, every the bottom connecting piece all lays on same tunnel cross section with the tunnel bottom steel bow member that it is connected.
Above-mentioned tunnel assembled inverted arch structure, characterized by: each tunnel bottom steel arch comprises a tunnel bottom arch embedded in an arch prefabricated member and a steel arch overhanging section connected with the tunnel bottom arch into a whole, and the tunnel bottom arch and the steel arch overhanging section are connected in a welding mode;
the tunnel secondary lining of the constructed tunnel comprises an arch wall secondary lining for supporting an arch wall of the constructed tunnel, wherein the arch wall secondary lining is of a cast-in-place concrete structure;
arch prefab outer end is connected as an organic wholely with the hunch wall secondary lining who is located its outside, pre-buried two lining connecting reinforcement of multichannel in the arch prefab, the multichannel two lining connecting reinforcement's outer end subsection all stretches out to the arch prefab outside, every way two lining connecting reinforcement's outer end subsection all buries underground in the hunch wall secondary lining who is located its outside.
Above-mentioned tunnel assembled inverted arch structure, characterized by: connecting seams between the middle inverted arch prefabricated member and the two side inverted arch prefabricated members in each fabricated inverted arch are wet seams;
above-mentioned tunnel assembled inverted arch structure, characterized by: each side inverted arch prefabricated part also comprises a plurality of supporting seats which are arranged on the arched prefabricated part from left to right and used for supporting the concrete beam slab, and the plurality of supporting seats are all reinforced concrete prefabricated parts and are prefabricated with the arched prefabricated parts into a whole; and the concrete beam plates in each fabricated inverted arch are supported on a plurality of supporting seats below the concrete beam plates.
Above-mentioned tunnel assembled inverted arch structure, characterized by: the longitudinal connecting pieces are longitudinal connecting bolts, and the front and rear adjacent supporting seats and the front and rear adjacent middle inverted arch prefabricated parts are connected through one longitudinal connecting bolt;
every in every assembled inverted arch every all through vertical connecting bolt fastening connection between supporting seat and the concrete beam board, it has a plurality of vertical bolt mounting holes that supply vertical connecting bolt to install to open on the concrete beam board.
Above-mentioned tunnel assembled inverted arch structure, characterized by: every in the lateral part invert prefab the quantity of supporting seat is two, every in the lateral part invert prefab two be vertical drainage channel between the supporting seat, two lay the one deck waterproof layer between the supporting seat, the waterproof layer is laid on the arch prefab.
Above-mentioned tunnel assembled inverted arch structure, characterized by: the bottom parts of the left side and the right side of the secondary lining of the arch wall are respectively provided with a plurality of transverse drainage pipes from front to back, each transverse drainage pipe is positioned on the outer side of one arch prefabricated member, and each transverse drainage pipe is uniformly distributed on the cross section of one tunnel and gradually inclines upwards from inside to outside; the transverse drainage prefabricated parts are internally embedded with an embedded drainage pipe used for being connected with the transverse drainage pipe, the transverse drainage pipe is positioned on the outer side of the transverse drainage prefabricated parts, and the inner ends of the embedded drainage pipes are communicated with the longitudinal drainage channel positioned on the inner side of the embedded drainage pipes; the outer end of the embedded drain pipe is communicated with a transverse drain pipe positioned on the outer side of the embedded drain pipe, and the embedded drain pipe and the transverse drain pipe are connected to form a straight drain pipe;
the bottom parts of the left side and the right side of the secondary lining of the arch wall are respectively provided with a longitudinal drainage pipe, and the outer end of each transverse drainage pipe is communicated with the longitudinal drainage pipe positioned on the outer side of the transverse drainage pipe;
the outer end of the embedded drain pipe is connected with the transverse drain pipe located on the outer side of the embedded drain pipe through a connecting joint, and the connecting joint is embedded in the transverse drain prefabricated part.
Compared with the prior art, the utility model has the following advantage:
1. simple structure and low construction cost.
2. The assembled inverted arches comprise tunnel bottom supporting structures and concrete beam plates supported on the tunnel bottom supporting structures, the tunnel bottom supporting structures comprise lateral inverted arch prefabricated members which are symmetrically arranged at the left and right sides and a middle inverted arch prefabricated member connected between the two lateral inverted arch prefabricated members, wet joints are adopted between the two lateral inverted arch prefabricated members and the middle inverted arch prefabricated member, tunnel bottom steel arch frames of tunnel steel arch frames are pre-embedded in the two lateral inverted arch prefabricated members, and the assembled inverted arches and the side wall supports are fastened and reliably connected through the connection between the tunnel bottom steel arch frames and the side wall supports; meanwhile, the two lining connecting steel bars of the assembled inverted arch are connected with the two lining steel bars of the secondary lining of the arch wall, so that the assembled inverted arch and the secondary lining of the arch wall are fastened and reliably connected.
3. Good and practical value of result of use is high, the utility model discloses mainly focus on tunnel arch camber line following part structure. The supporting structure above the tunnel arch springing line adopts the traditional construction mode, the inverted arch primary support, the secondary lining and the inverted arch filling adopt the integral block prefabrication mode, and the splicing connection is realized by adopting the wet joint and the bolting mode, wherein the wet joint can effectively eliminate the tiny error caused by the construction, and the leveling layer paved on the precast concrete beam plate can meet the requirements of different road surface cross slopes. Welding an inverted arch and a primary support of a side wall (namely a side wall bracket) through micro overexcavation, a reserved steel arch frame overhanging section and a connecting steel plate, then casting the inverted arch and the side wall into a whole in a cast-in-place mode, and controlling sedimentation through arranging a locking anchor pipe; and binding the two-lining reinforcing steel bars of the side wall with the two-lining connecting reinforcing steel bars reserved and then casting the two-lining connecting reinforcing steel bars into a whole in a cast-in-situ mode. In addition, waterproof layers (specifically waterproof cloth) are laid on the two supporting seats on the side inverted arch prefabricated member to form a longitudinal drainage channel, so that a central drainage ditch in the traditional design is replaced; the side inverted arch prefabricated member is provided with an embedded drain pipe connected with a transverse drain pipe, so that connection of longitudinal drainage and transverse drainage is realized.
To sum up, the utility model has the advantages of reasonable design, the construction is simple and convenient and excellent in use effect, is connected the formation assembled invert with the concrete beam board with the bottom of the tunnel bearing structure to with the tunnel bottom bearing structure and side wall support and encircle wall secondary lining fastening connection as an organic whole, save tunnel invert first, two linings of invert and invert backfill the work progress, can effectively shorten construction period, and can effectively guarantee construction quality.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of the concrete beam slab of the utility model.
Fig. 3 is the structure diagram of the middle inverted arch prefabricated member of the utility model.
Fig. 4 is a schematic structural view of the side inverted arch prefabricated member of the present invention.
Fig. 5 is a schematic view of the connection between the overhanging section and the bottom connecting member of the steel arch according to the present invention.
Fig. 6 is a schematic view of the connection between the overhanging section of the steel arch and the second connecting steel plate according to the present invention.
Fig. 7 is the utility model discloses the connected state schematic diagram between middle part invert prefab and the lateral part invert prefab.
Fig. 8 is the utility model discloses around two adjacent middle part inverted arch prefabs vertical face connection state sketch map of longitudinal tie bolt between the prefab.
Fig. 9 is the plane connection state diagram of the longitudinal connecting bolt between the front and back adjacent middle inverted arch prefabricated members of the utility model.
Fig. 10 is a schematic structural view of the longitudinal connecting bolt of the present invention.
Fig. 11 is the position schematic diagram is laid to waterproof layer and horizontal drain pipe's facade on the lateral part invert prefab.
Fig. 12 is the position schematic diagram of the plane layout of the waterproof layer and the transverse drain pipe on the side inverted arch prefabricated member of the utility model.
Description of reference numerals:
1, constructing a tunnel; 2, secondary lining of arch walls; 3-side inverted arch prefabricated part;
3-1-arch preform; 3-2-steel arch frame overhanging section; 3-inner support seat;
3-4-outer support base; 3-5 connecting reinforcing steel bars in the first seam;
3-6 connecting reinforcing steel bars in the second seam; 3-7-two lining connecting steel bars;
4-middle inverted arch prefabricated member; 5-concrete beam slab; 6-tunnel bottom steel arch frame;
7-side wall support; 8-wet seaming; 10-bottom connector;
11-a first connecting steel plate; 12-a second connecting steel plate; 13-vertical connecting bolts;
14-vertical bolt mounting holes; 15-concrete leveling layer; 16-asphalt surface layer;
17-locking anchor pipe; 18-a diagonal support member; 19-longitudinal connecting bolt;
20-locking nut; 21-waterproof layer; 22-pre-burying a drain pipe;
23-a transverse drain pipe; 24-longitudinal drainage pipe; 25-a connection joint;
26-cable channel; 27-an elastic gasket; 28-plastic sleeve.
Detailed Description
As shown in fig. 1, the tunnel assembled type inverted arch structure is formed by assembling a plurality of assembled type inverted arches, wherein the assembled type inverted arches have the same structure and are arranged from front to back along the longitudinal extension direction of a constructed tunnel 1;
the primary support structure of the constructed tunnel 1 comprises a plurality of tunnel steel arches which are identical in structure and are arranged from front to back along the longitudinal extension direction of the constructed tunnel 1; each tunnel steel arch frame is positioned on one tunnel cross section of the constructed tunnel 1, each tunnel steel arch frame comprises an arch support for supporting the arch part of the constructed tunnel 1, two side wall supports 7 symmetrically connected below the left side and the right side of the arch support frame and an inverted arch support connected between the bottoms of the two side wall supports 7, the inner sides of the left side and the right side of the constructed tunnel 1 are provided with one side wall support 7, the arch support, the two side wall supports 7 and the inverted arch support in each tunnel steel arch frame are uniformly distributed on the same tunnel cross section, and the arch support and the two side wall supports 7 in each tunnel steel arch frame form an arch support for supporting the arch wall of the constructed tunnel 1; each inverted arch support comprises a left tunnel bottom steel arch 6 and a right tunnel bottom steel arch 6 which are symmetrically arranged, and the outer end of each tunnel bottom steel arch 6 is fixedly connected with the bottom of a side wall support 7 positioned on the outer side of the tunnel bottom steel arch 6;
the front and rear adjacent two fabricated inverted arches are fixedly connected through a plurality of longitudinal connecting pieces which are uniformly distributed on the cross section of the same tunnel; with reference to fig. 2, 3 and 4, each fabricated inverted arch includes a tunnel bottom supporting structure and a concrete beam plate 5 supported on the tunnel bottom supporting structure, the tunnel bottom supporting structure and the concrete beam plate 5 are horizontally arranged and have the same longitudinal length, and the tunnel bottom supporting structure and the concrete beam plate 5 are uniformly arranged on the same tunnel cross section of the constructed tunnel 1; the tunnel bottom supporting structure comprises two lateral inverted arch prefabricated members 3 which are symmetrically arranged at the left and right sides and a middle inverted arch prefabricated member 4 connected between the two lateral inverted arch prefabricated members 3, and the longitudinal lengths of the middle inverted arch prefabricated member 4 and the two lateral inverted arch prefabricated members 3 are the same; the side inverted arch prefabricated member 3, the middle inverted arch prefabricated member 4 and the concrete beam plate 5 are all reinforced concrete prefabricated members, and the middle inverted arch prefabricated member 4 is horizontally arranged and is positioned right below the concrete beam plate 5;
each assembled inverted arch is provided with one tunnel steel arch; each side inverted arch prefabricated part 3 comprises an arch-shaped prefabricated part 3-1 supported at the bottom of one side of the constructed tunnel 1, and the arch-shaped prefabricated parts 3-1 are reinforced concrete prefabricated parts; the bottom of the inner side of each arch prefabricated member 3-1 is provided with one tunnel bottom steel arch 6, the outer end of each tunnel bottom steel arch 6 extends out of the outer side of the arch prefabricated member 3-1 where the tunnel bottom steel arch 6 is located, the outer end of each tunnel bottom steel arch 6 is provided with a steel arch overhanging section 3-2, and the steel arch overhanging section 3-2 is fixedly connected with the bottom of a side wall bracket 7 located on the outer side of the steel arch overhanging section; the middle inverted arch prefabricated member 4 in each fabricated inverted arch is connected between two arched prefabricated members 3-1 which are symmetrically arranged left and right.
In this embodiment, each of the fabricated inverted arches further includes a concrete leveling layer 15 laid on the concrete beam plate 5, and an asphalt surface layer 16 having one side laid on the concrete leveling layer 15. And a concrete leveling layer 15 is laid on the concrete beam plate 5 to meet the requirements of different road surface cross slopes.
In order to facilitate the supporting and effectively improve the supporting stability, in this embodiment, the side wall brackets 7 are vertically arranged, and the steel arch frame overhanging sections 3-2 are horizontally arranged.
In this embodiment, the tunnel bottom steel arch frame 6 and the side wall support 7 are all i-steel.
In actual construction, other types of steel bar members can be used for the tunnel bottom steel arch 6 and the side wall brackets 7.
In this embodiment, connect with the welding mode between tunnel bottom steel bow member 6 and the side wall support 7, the actual connection is simple and convenient, reliable.
The inner side of the bottom of each side wall bracket 7 is provided with a bottom connecting piece 10 for connecting a tunnel bottom steel arch frame 6, and the bottom connecting pieces 10 are I-shaped steel and are horizontally arranged; every bottom connecting piece 10 all welds as an organic wholely with the tunnel bottom steel bow member 6 that is located its inboard, every bottom connecting piece 10 all lays on same tunnel cross section rather than the tunnel bottom steel bow member 6 that connects.
To further improve the stability, an inclined support member 18 is provided between the bottom of each side wall bracket 7 and the bottom connecting member 10 located inside the side wall bracket.
In this embodiment, the diagonal support member 18 is an i-steel. In practical applications, the diagonal support member 18 may be made of other types of steel bars.
In order to further improve the stability, the outside of the bottom of each side wall bracket 7 is provided with a lock pin anchor pipe 17.
In this embodiment, two locking anchor pipes 17 are arranged on the outer side of the bottom of each side wall support 7, and each side wall support 7 and the two locking anchor pipes 17 positioned on the inner side of the side wall support are arranged on the same tunnel cross section; the two lock leg anchor pipes 17 are respectively an upper lock leg anchor pipe and a lower lock leg anchor pipe positioned under the upper lock leg anchor pipe, the inner end of the upper lock leg anchor pipe is fixed at the joint of the side wall bracket 7 and the oblique support member 18, and the inner end of the lower lock leg anchor pipe is fixed at the joint of the bottom connecting member 10 and the oblique support member 18.
As shown in fig. 5 and 6, the outer end of each bottom connector 10 is fixedly connected with the side wall bracket 7 located at the outer side thereof, and the inner end of each bottom connector 10 is provided with a first connecting steel plate 11; the outer end of each steel arch overhanging section 3-2 is provided with a second connecting steel plate 12 for connecting with the first connecting steel plate 11.
In this embodiment, the first connecting steel plate 11 and the second connecting steel plate 12 are both vertically arranged. The first connecting steel plate 11 and the second connecting steel plate 12 are both rectangular straight steel plates and are welded and fixed into a whole.
And the steel arch overhanging section 3-2 and the second connecting steel plate 12, the bottom connecting piece 10 and the side wall bracket 7 and the bottom connecting piece 10 and the first connecting steel plate 11 are connected in a welding mode. Therefore, the actual connection is simple and reliable.
For simple prefabrication, each tunnel bottom steel arch 6 comprises a tunnel bottom arch embedded in the arch prefabricated member 3-1 and a steel arch overhanging section 3-2 integrally connected with the tunnel bottom arch, and the tunnel bottom arch and the steel arch overhanging section 3-2 are connected in a welding mode. Thus, each of the bottom steel arches 6 is equally divided into the bottom arch and steel arch runout 3-2. When the arch prefabricated member 3-1 is prefabricated, only the tunnel bottom arch frame is buried in the arch prefabricated member 3-1, and when the steel arch frame is actually assembled on site, the steel arch frame overhanging section 3-2 is connected with the tunnel bottom arch frame.
For simple and reliable connection, a third connecting steel plate is welded and fixed at the outer end of the tunnel bottom arch frame, a fourth connecting steel plate is welded and fixed at the inner end of the steel arch frame overhanging section 3-2, and the third connecting steel plate and the fourth connecting steel plate are both rectangular straight steel plates and are welded and fixed into a whole.
In the embodiment, the tunnel secondary lining of the constructed tunnel 1 comprises an arch wall secondary lining 2 for supporting the arch wall of the constructed tunnel 1, wherein the arch wall secondary lining 2 is of a cast-in-place concrete structure;
the outer end of the arch prefabricated part 3-1 is connected with the arch wall secondary lining 2 located on the outer side of the arch prefabricated part as a whole, a plurality of second lining connecting steel bars 3-7 are pre-embedded in the arch prefabricated part 3-1, the outer end sections of the second lining connecting steel bars 3-7 extend out of the outer side of the arch prefabricated part 3-1, and the outer end sections of the second lining connecting steel bars 3-7 are buried in the arch wall secondary lining 2 located on the outer side of the arch prefabricated part every time. Thus, the arch-shaped prefabricated member 3-1 and the arch wall secondary lining 2 can be firmly connected into a whole. The outer end sections of the two lining connecting steel bars 3-7 are all fastened and connected with the steel bar mesh in the arch wall secondary lining 2 into a whole.
As shown in fig. 7, the connection joints between the middle inverted arch preform 4 and the two side inverted arch preforms 3 in each fabricated inverted arch are wet joints 8.
In order to further improve the connection quality between the middle inverted arch prefabricated member 4 and the two side inverted arch prefabricated members 3 in each fabricated inverted arch, first in-seam connecting steel bars 3-5 are pre-embedded inside the arched prefabricated members 3-1, the first in-seam connecting steel bars 3-5 are located in wet seams 8, and the inner ends of the first in-seam connecting steel bars 3-5 are embedded in the arched prefabricated members 3-1; second joint in-connection reinforcing steel bars 3-6 used for being connected with the first joint in-connection reinforcing steel bars 3-5 are embedded in the left side and the right side of the middle inverted arch prefabricated member 4, the second joint in-connection reinforcing steel bars 3-6 are located in the wet joint 8, and the inner ends of the second joint in-connection reinforcing steel bars 3-6 are embedded in the middle inverted arch prefabricated member 4.
In this embodiment, the first in-seam connecting steel bar 3-5 and the second in-seam connecting steel bar 3-6 are welded into a whole. And the wet seam 8 is laid vertically. Therefore, the actual construction is very simple.
As shown in fig. 1, each side inverted arch prefabricated member 3 further comprises a plurality of supporting seats which are arranged on the arch prefabricated member 3-1 from left to right and support the concrete beam slab 5, and the plurality of supporting seats are all reinforced concrete prefabricated members and are prefabricated with the arch prefabricated member 3-1 into a whole; and the concrete beam plates 5 in each fabricated inverted arch are supported on a plurality of supporting seats below the fabricated inverted arch. During actual construction, the supporting seat can be prefabricated into a supporting column.
In this embodiment, each support seat in each fabricated inverted arch is fastened and connected with a concrete beam plate 5 through a vertical connecting bolt 13, and a plurality of vertical bolt mounting holes 14 for mounting the vertical connecting bolts 13 are formed in the concrete beam plate 5. Thus, the field assembly is simple and the connection is reliable.
In this embodiment, the longitudinal connecting member is a longitudinal connecting bolt 19, which is shown in detail in fig. 8, 9 and 10.
During actual construction, the longitudinal connecting piece can also adopt other types of connecting pieces, such as longitudinal connecting reinforcing steel bars and the like, and only the requirement of simple, convenient, quick and high-quality connection can be met.
As shown in fig. 1, the front and rear adjacent support seats and the front and rear adjacent middle inverted arch preforms 4 are connected by one longitudinal connecting bolt 19. Correspondingly, the front end and the rear end of each supporting seat and the front end and the rear end of each middle inverted arch prefabricated member 4 are respectively provided with a bolt mounting groove for mounting a longitudinal connecting bolt 19.
In order to ensure the connection tightness, elastic sealing gaskets 27 are arranged between the front adjacent two supporting seats and between the front adjacent two middle inverted arch prefabricated members 4.
For simple and reliable connection, in this embodiment, the longitudinal connecting bolts 19 connected between the front and rear adjacent two middle inverted arch preforms 4 are vertically arranged, and the longitudinal connecting bolts 19 connected between the front and rear adjacent two supporting seats are horizontally arranged. And, the longitudinal connecting bolt 19 connected between the front and rear adjacent two middle inverted arch prefabricated members 4 is positioned above the middle part of the middle inverted arch prefabricated member 4, and the longitudinal connecting bolt 19 connected between the front and rear adjacent two supporting seats is positioned in the middle part of one side of the supporting seat.
As shown in fig. 10, the longitudinal connecting bolt 19 includes an arc connecting rod and two straight rod sections respectively connected to two ends of the arc connecting rod, and the straight rod sections are provided with external threads; each of the straight pole segments is provided with a lock nut 20. The outer side of the arc connecting rod is coaxially sleeved with a plastic sleeve 28.
For reliable connection, the straight rod section is sleeved with a gasket.
In the embodiment, the number of the supporting seats in each side inverted arch prefabricated part 3 is two, and the two supporting seats are respectively an inner supporting seat 3-3 arranged above the inner side of the arch prefabricated part 3-1 and an outer supporting seat 3-4 arranged above the outer side of the arch prefabricated part 3-1; each assembled inverted arch comprises two outer supporting seats 3-4 which are symmetrically arranged left and right and two inner supporting seats 3-3 which are symmetrically arranged left and right.
As shown in fig. 11 and 12, a longitudinal drainage channel is formed between two support seats in each side inverted arch preform 3, a waterproof layer 21 is arranged between the two support seats, and the waterproof layer 21 is laid on the arch preform 3-1.
In the embodiment, the bottoms of the left side and the right side of the arch wall secondary lining 2 are respectively provided with a plurality of transverse drainage pipes 23 from front to back, each transverse drainage pipe 23 is positioned at the outer side of one arch prefabricated member 3-1, and each transverse drainage pipe 23 is uniformly distributed on the cross section of one tunnel and gradually inclines upwards from inside to outside; the arched prefabricated members 3-1 with the transverse drainage pipes 23 distributed on the outer sides are transverse drainage prefabricated members, each transverse drainage prefabricated member is internally pre-embedded with a pre-embedded drainage pipe 22 for being connected with the transverse drainage pipe 23, the transverse drainage pipe 23 is positioned on the outer side of the transverse drainage prefabricated member, and the inner ends of the pre-embedded drainage pipes 22 are communicated with the longitudinal drainage channel positioned on the inner side of the transverse drainage prefabricated member; the outer end of the pre-buried drain pipe 22 is communicated with a transverse drain pipe 23 positioned on the outer side of the pre-buried drain pipe, and the pre-buried drain pipe and the transverse drain pipe are connected to form a straight drain pipe.
Referring to fig. 1, the bottom of the left side and the bottom of the secondary lining 2 of the arch wall are both provided with a longitudinal drainage pipe 24, and the outer end of the transverse drainage pipe 23 is communicated with the longitudinal drainage pipe 24 positioned on the outer side of the transverse drainage pipe.
The outer end of the embedded drain pipe 22 is connected with the transverse drain pipe 23 positioned on the outer side of the embedded drain pipe through a connecting joint 25, and the connecting joint 25 is embedded in the transverse drain prefabricated member.
In this way, the pre-buried drain pipes 22 in the assembled inverted arch can be simply and quickly connected with the longitudinal drain pipes (i.e. the longitudinal drain channels and the longitudinal drain pipes 24) of the tunnel to form a tunnel drain system.
In this embodiment, the arch support has the same shape as the arch cross-sectional shape of the tunnel 1 to be constructed. The cross section shape of the arch wall secondary lining 2 is the same as that of the arch wall of the constructed tunnel 1.
In actual construction, a tunnel arch wall preliminary bracing structure (i.e., a preliminary bracing structure above the arch line of the constructed tunnel 1) for preliminary bracing the arch wall of the constructed tunnel 1 is constructed by a conventional anchor-jet method. The secondary lining 2 of the arch wall is a cast-in-place concrete lining which is of a molded concrete structure, and construction is carried out by adopting a conventional two-lining trolley. And the primary support structure (being the primary support of the inverted arch), the secondary lining of the tunnel bottom (being the secondary lining of the inverted arch) and the inverted arch backfill structure at the bottom of the constructed tunnel 1 are all assembled by prefabricated members, specifically, a middle inverted arch prefabricated member 4, two prefabricated members of the lateral inverted arch 3, a concrete beam plate 5 and other prefabricated members are assembled to form a truss, and the assembled inverted arch is connected to form the tunnel bottom support structure. During actual construction, primary support, secondary lining construction and inverted arch backfill construction for the bottom of the constructed tunnel 1 do not need to be carried out according to a traditional tunnel construction method, and a plurality of assembled inverted arches are assembled one by one and are assembled into a whole.
In the embodiment, the multiple fabricated inverted arches are the same in structure and size and are uniformly distributed, and the multiple tunnel steel arches are the same in structure and size and are uniformly distributed;
and the distance between two adjacent fabricated inverted arches is the same as the distance between two adjacent tunnel steel arches. The longitudinal length of each assembled inverted arch is the same as the distance between two adjacent tunnel steel arches.
Therefore, the longitudinal length of each assembled type inverted arch and the distance between two adjacent assembled type inverted arches are determined according to the distance between two adjacent tunnel steel arches.
Because wet joints 8 are adopted between the middle inverted arch prefabricated member 4 and the two side inverted arch prefabricated members 3 in each fabricated inverted arch, the dislocation between the middle inverted arch prefabricated member 4 and the side inverted arch prefabricated members 3 can be effectively prevented, and meanwhile, construction errors can be adjusted. When actually excavating the constructed tunnel 1, the left side wall bottom and the right side wall bottom need to be respectively overetched so as to obtain an operation space for splicing the tunnel bottom steel arch frame 6 and the side wall support 7. When the arch wall of the constructed tunnel 1 is primarily supported, the tunnel bottom steel arch 6 is connected with the side wall bracket 7; and when constructing the secondary lining 2 of the arch wall, connecting the connecting reinforcing steel bars 3-7 of the second lining with the reinforcing steel bar mesh in the secondary lining 2 of the arch wall, and pouring the assembled inverted arch, the primary supporting structure of the arch wall of the constructed tunnel 1 and the secondary lining 2 of the arch wall into a whole.
And in the process of excavating the constructed tunnel 1, synchronously carrying out tunnel primary support on the arch wall of the excavated and formed constructed tunnel 1. When the constructed tunnel 1 is excavated, the excavation is performed from back to front along the longitudinal extension direction of the tunnel. During actual excavation, the lower side walls on the left side and the right side are excavated in a staggered mode (upper arch feet are prevented from being suspended at the same time), the side wall supports 7 on the left side and the right side are erected in place in a staggered mode, and the locking foot anchor pipes 17 are arranged in a beating mode. And after the inverted arch of the constructed tunnel 1 is picked up and dug to the designed contour line, assembling the assembled inverted arches one by one from back to front.
When any one fabricated inverted arch is assembled, the middle inverted arch prefabricated part 4 and the two side inverted arch prefabricated parts 3 of the fabricated inverted arch are hoisted in place, the middle inverted arch prefabricated part 4 and the two side inverted arch prefabricated parts 3 are spliced into a whole by adopting wet joints, and a tunnel bottom steel arch 6 is fixedly connected with a side wall support 7 to obtain the tunnel bottom support structure formed by construction; and then, arranging a concrete beam plate 5 on the tunnel bottom supporting structure, and firmly connecting the concrete beam plate 5 and the tunnel bottom supporting structure into a whole to finish the assembling process of one fabricated inverted arch. And then, assembling the next assembled inverted arch, installing two lining steel bars of the arch wall secondary lining 2 when the longitudinal total length of the assembled multiple assembled inverted arches reaches the length of pouring one arch wall secondary lining 2 by a two-lining trolley, binding the two lining connecting steel bars 3-7 of the assembled inverted arch and the two lining steel bars of the arch wall secondary lining 2 into a whole, then applying the arch wall secondary lining 2 and well performing maintenance work according to the relevant specification. And finally, constructing the cable grooves 26 on the left side and the right side of the constructed tunnel 1, paving the concrete leveling layer 15, and paving the asphalt surface layer 16.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (10)
1. The utility model provides a tunnel assembled inverted arch structure which characterized in that: the tunnel is formed by splicing a plurality of fabricated inverted arches, wherein the fabricated inverted arches have the same structure and are distributed from front to back along the longitudinal extension direction of a constructed tunnel (1);
the primary support structure of the constructed tunnel (1) comprises a plurality of tunnel steel arches, the structures of the tunnel steel arches are the same, and the tunnel steel arches are arranged from front to back along the longitudinal extension direction of the constructed tunnel (1); each tunnel steel arch frame is positioned on one tunnel cross section of the constructed tunnel (1), each tunnel steel arch frame comprises an arch support for supporting the arch part of the constructed tunnel (1), two side wall supports (7) symmetrically connected below the left side and the right side of the arch support frame and an inverted arch support connected between the bottoms of the two side wall supports (7), the inner sides of the left side and the right side of the constructed tunnel (1) are respectively provided with one side wall support (7), each arch support in each tunnel steel arch frame, the two side wall supports (7) and the inverted arch support are uniformly distributed on the same tunnel cross section, and the arch part support and the two side wall supports (7) in each tunnel steel arch form an arch wall support for supporting an arch wall of the constructed tunnel (1); each inverted arch support comprises a left tunnel bottom steel arch frame and a right tunnel bottom steel arch frame (6) which are symmetrically arranged, and the outer end of each tunnel bottom steel arch frame (6) is fixedly connected with the bottom of a side wall support (7) positioned on the outer side of the tunnel bottom steel arch frame;
the front and rear adjacent two fabricated inverted arches are fixedly connected through a plurality of longitudinal connecting pieces which are uniformly distributed on the cross section of the same tunnel; each fabricated inverted arch comprises a tunnel bottom supporting structure and a concrete beam plate (5) supported on the tunnel bottom supporting structure, the tunnel bottom supporting structure and the concrete beam plate (5) are horizontally arranged and have the same longitudinal length, and the tunnel bottom supporting structure and the concrete beam plate (5) are uniformly distributed on the same tunnel cross section of the constructed tunnel (1); the tunnel bottom supporting structure comprises two lateral inverted arch prefabricated members (3) which are symmetrically arranged at the left side and the right side and a middle inverted arch prefabricated member (4) connected between the two lateral inverted arch prefabricated members (3), wherein the longitudinal lengths of the middle inverted arch prefabricated member (4) and the two lateral inverted arch prefabricated members (3) are the same; the side inverted arch prefabricated members (3), the middle inverted arch prefabricated members (4) and the concrete beam plates (5) are all reinforced concrete prefabricated members, and the middle inverted arch prefabricated members (4) are horizontally arranged and are located right below the concrete beam plates (5);
each assembled inverted arch is provided with one tunnel steel arch; each side inverted arch prefabricated part (3) comprises an arch-shaped prefabricated part (3-1) supported at the bottom of one side of the constructed tunnel (1), and the arch-shaped prefabricated parts (3-1) are reinforced concrete prefabricated parts; the bottom of the inner side of each arch prefabricated member (3-1) is provided with one tunnel bottom steel arch (6), the outer end of each tunnel bottom steel arch (6) extends out of the outer side of the arch prefabricated member (3-1) where the tunnel bottom steel arch (6) is located, the outer end of each tunnel bottom steel arch (6) is provided with a steel arch overhanging section (3-2), and the steel arch overhanging section (3-2) is fixedly connected with the bottom of a side wall support (7) located on the outer side of the steel arch overhanging section; the middle inverted arch prefabricated member (4) in each fabricated inverted arch is connected between the two arched prefabricated members (3-1) which are symmetrically arranged left and right.
2. A tunnel-mounted inverted arch structure according to claim 1, wherein: the multiple assembled inverted arches are identical in structure and size and are uniformly distributed, and the multiple tunnel steel arches are identical in structure and size and are uniformly distributed;
and the distance between two adjacent fabricated inverted arches is the same as the distance between two adjacent tunnel steel arches.
3. A tunnel-assembled inverted arch structure according to claim 1 or 2, wherein: the outer side of the bottom of each side wall bracket (7) is provided with a locking anchor pipe (17);
each assembled inverted arch also comprises a concrete leveling layer (15) paved on the concrete beam plate (5) and an asphalt surface layer (16) with one side paved on the concrete leveling layer (15).
4. A tunnel-assembled inverted arch structure according to claim 1 or 2, wherein: the inner side of the bottom of each side wall support (7) is provided with a bottom connecting piece (10) for connecting a tunnel bottom steel arch frame (6), and the bottom connecting pieces (10) are I-shaped steel and are horizontally arranged; every bottom connecting piece (10) all welds as an organic wholely with the tunnel bottom steel bow member (6) that is located its inboard, every bottom connecting piece (10) all lays on same tunnel cross section rather than the tunnel bottom steel bow member (6) of connecting.
5. A tunnel-assembled inverted arch structure according to claim 1 or 2, wherein: each tunnel bottom steel arch (6) comprises a tunnel bottom arch embedded in an arch prefabricated member (3-1) and a steel arch extending section (3-2) connected with the tunnel bottom arch into a whole, and the tunnel bottom arch and the steel arch extending section (3-2) are connected in a welding mode;
the tunnel secondary lining of the constructed tunnel (1) comprises an arch wall secondary lining (2) for supporting an arch wall of the constructed tunnel (1), wherein the arch wall secondary lining (2) is of a cast-in-place concrete structure;
the arch prefab (3-1) outer end is connected as an organic wholely with the hunch wall secondary lining (2) that is located its outside, pre-buried two lining connecting reinforcement of multichannel (3-7) in the arch prefab (3-1), multichannel the outer end subsection of two lining connecting reinforcement (3-7) all stretches out to the arch prefab (3-1) outside, every the outer end subsection of two lining connecting reinforcement (3-7) all buries underground in being located its outside hunch wall secondary lining (2).
6. A tunnel-assembled inverted arch structure according to claim 1 or 2, wherein: and connecting seams between the middle inverted arch prefabricated member (4) and the two side inverted arch prefabricated members (3) in each assembled inverted arch are wet seams (8).
7. A tunnel-mounted inverted arch structure according to claim 5, wherein: each side inverted arch prefabricated part (3) further comprises a plurality of supporting seats which are arranged on the arched prefabricated part (3-1) from left to right and support the concrete beam slab (5), and the plurality of supporting seats are reinforced concrete prefabricated parts and are prefabricated with the arched prefabricated part (3-1) into a whole; and the concrete beam plates (5) in each fabricated inverted arch are supported on a plurality of supporting seats below the fabricated inverted arch.
8. A tunnel-mounted inverted arch structure according to claim 7, wherein: the longitudinal connecting pieces are longitudinal connecting bolts (19), and the front and rear adjacent supporting seats and the front and rear adjacent middle inverted arch prefabricated parts (4) are connected through one longitudinal connecting bolt (19);
and each supporting seat in each assembled inverted arch is fixedly connected with the concrete beam plate (5) through a vertical connecting bolt (13), and the concrete beam plate (5) is provided with a plurality of vertical bolt mounting holes (14) for mounting the vertical connecting bolts (13).
9. A tunnel-mounted inverted arch structure according to claim 7, wherein: every in lateral part invert prefab (3) the quantity of supporting seat is two, every in lateral part invert prefab (3) two be vertical drainage channel between the supporting seat, two lay one deck waterproof layer (21) between the supporting seat, waterproof layer (21) are laid on arch prefab (3-1).
10. A tunnel-mounted inverted arch structure according to claim 9, wherein: the bottom parts of the left side and the right side of the arch wall secondary lining (2) are respectively provided with a plurality of transverse drainage pipes (23) from front to back, each transverse drainage pipe (23) is positioned at the outer side of one arch prefabricated part (3-1), and each transverse drainage pipe (23) is uniformly distributed on the cross section of one tunnel and gradually inclines upwards from inside to outside; the transverse drainage prefabricated parts are arch-shaped prefabricated parts (3-1) with transverse drainage pipes (23) distributed on the outer sides, each transverse drainage prefabricated part is internally embedded with an embedded drainage pipe (22) used for being connected with the transverse drainage pipe (23), the transverse drainage pipes (23) are positioned on the outer sides of the transverse drainage prefabricated parts, and the inner ends of the embedded drainage pipes (22) are communicated with the longitudinal drainage channels positioned on the inner sides of the embedded drainage pipes; the outer end of the embedded drain pipe (22) is communicated with a transverse drain pipe (23) positioned on the outer side of the embedded drain pipe, and the embedded drain pipe and the transverse drain pipe are connected to form a straight drain pipe;
the bottom parts of the left side and the right side of the arch wall secondary lining (2) are respectively provided with a longitudinal drainage pipe (24), and the outer end of the transverse drainage pipe (23) is communicated with the longitudinal drainage pipe (24) positioned on the outer side of the transverse drainage pipe;
the outer end of the embedded drainage pipe (22) is connected with the transverse drainage pipe (23) located on the outer side of the embedded drainage pipe through a connecting joint (25), and the connecting joint (25) is embedded in the transverse drainage prefabricated part.
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| CN201921115543.2U CN210622820U (en) | 2019-07-16 | 2019-07-16 | Tunnel assembled inverted arch structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145196A (en) * | 2020-09-30 | 2020-12-29 | 中铁二十局集团有限公司 | Tunnel inverted arch structure and construction method thereof |
| CN114263476A (en) * | 2021-12-20 | 2022-04-01 | 中国建筑第八工程局有限公司 | Prefabricated inverted arch and inverted arch filling body splicing structure and construction method thereof |
| CN116241286A (en) * | 2023-04-12 | 2023-06-09 | 成都理工大学 | Inverted arch with tunnel high-rigidity superposed structure and construction method |
-
2019
- 2019-07-16 CN CN201921115543.2U patent/CN210622820U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145196A (en) * | 2020-09-30 | 2020-12-29 | 中铁二十局集团有限公司 | Tunnel inverted arch structure and construction method thereof |
| CN114263476A (en) * | 2021-12-20 | 2022-04-01 | 中国建筑第八工程局有限公司 | Prefabricated inverted arch and inverted arch filling body splicing structure and construction method thereof |
| CN116241286A (en) * | 2023-04-12 | 2023-06-09 | 成都理工大学 | Inverted arch with tunnel high-rigidity superposed structure and construction method |
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