CN113756836A - Advanced support structure for tunnel intersection and construction method thereof - Google Patents
Advanced support structure for tunnel intersection and construction method thereof Download PDFInfo
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- CN113756836A CN113756836A CN202111036773.1A CN202111036773A CN113756836A CN 113756836 A CN113756836 A CN 113756836A CN 202111036773 A CN202111036773 A CN 202111036773A CN 113756836 A CN113756836 A CN 113756836A
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- 238000010276 construction Methods 0.000 title claims abstract description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 36
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000009415 formwork Methods 0.000 claims description 8
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/102—Removable shuttering; Bearing or supporting devices therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/107—Reinforcing elements therefor; Holders for the reinforcing elements
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- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a forepoling structure for a tunnel intersection and a construction method thereof, relates to the technical field of tunnel support, and aims at solving the problem that the existing supporting structure is inconvenient to adjust. The construction method is simple, the manufactured support can stably support the tunnel, the support part of the support structure can be simply and conveniently adjusted according to the adjustment requirements of workers, the working performance is high, the time required by construction is short, and the structure is convenient to use.
Description
Technical Field
The invention relates to the technical field of tunnel support, in particular to a forepoling structure for a tunnel intersection and a construction method of the forepoling structure.
Background
In the construction process of the tunnel, corresponding supporting structures are often required to be used for supporting the tunnel, so that the stability of the tunnel is improved.
Although the existing supporting structure can support a tunnel, in the using process, most supporting parts of the supporting structure are fixed at corresponding positions after the supporting parts are installed, so that the supporting structure is difficult to adjust according to the using requirements of engineering personnel and inconvenient to use, and therefore the advanced supporting structure for the tunnel intersection and the construction method thereof are provided.
Disclosure of Invention
The advance supporting structure for the tunnel intersection and the construction method thereof solve the problem that the supporting structure is inconvenient to adjust.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a be used for tunnel junction advance support structure, includes the prefabricated casing of assembling by the polylith prefabricated plate, the inside of prefabricated casing is equipped with many reinforcing bars, the filling hole has been seted up at the top of prefabricated casing, prefabricated casing is equipped with the stabilizing assembly who is used for supporting prefabricated casing, prefabricated casing still is equipped with the limited subassembly that is used for injecing the reinforcing bar position.
Preferably, the stabilizing component comprises an installation block fixed on the inner wall of the prefabricated shell, connecting blocks are hinged to the outer sides of the installation block, a connecting block is arranged at one end of each of two connecting blocks, a connecting groove is formed in one end, close to the connecting block, of each connecting block, one end, far away from the installation block, of each connecting block is connected to the corresponding connecting groove in a sliding mode, a loading groove is formed in the connecting block located inside the connecting groove, sliding blocks are connected to the two sides of the inside of the loading groove in a sliding mode, a plurality of connecting springs are arranged inside the loading groove, the two ends of each connecting spring are fixed to the corresponding sliding blocks respectively, a clamping block is fixed to one side, far away from the connecting springs, of each sliding block, clamping grooves are formed in the two sides, close to one end of each connecting block, of each clamping block are connected to the corresponding clamping grooves in a sliding mode, and the outer sides, far away from the end, far away from the connecting blocks, of the connecting blocks are hinged to the loading blocks, the one end that the loading piece kept away from the hookup piece has seted up the holding tank, the inside sliding connection of holding tank has the stabilizing piece, a plurality of stable grooves have been seted up to the inboard of prefabricated casing, the one end that the loading piece was kept away from to the stabilizing piece extends the outside of holding tank, and sliding connection is inside at corresponding stable inslot respectively.
Preferably, the stabilizing block positioned in the accommodating groove is provided with a thread groove, the inside of the thread groove is rotatably connected with a lead screw through a bearing, the other end of the lead screw extends out of the thread groove and is respectively rotatably connected on the inner walls of the corresponding accommodating grooves through bearings, the outer wall of the lead screw is fixedly sleeved with a limiting block which is rotatably sleeved in the accommodating groove, one end of the loading block close to the limiting block is provided with a sliding groove, the inside of the sliding groove is provided with a sliding block in a sliding way, the sliding block positioned in the accommodating groove is provided with a limiting groove, the limiting block is slidably connected in the limiting groove, the inner wall of the accommodating groove is provided with a connecting groove corresponding to the sliding block, the end part of the sliding block positioned in the accommodating groove is slidably connected in the connecting groove, the end part of the sliding block positioned outside the accommodating groove is fixedly provided with a poking block, and the poking block is fixedly provided with a plurality of reset springs, the other end of the return spring is fixed on the loading block.
Preferably, the limiting block is a rectangular block, and the limiting groove is a rectangular groove.
Preferably, the outside of loading the piece articulates through the hinge has the connecting plate, two be equipped with the connecting plate between the connecting plate, the connecting plate is close to the one end of connecting plate and has seted up the assembly groove, the inside sliding connection in assembly groove has the assembly piece, the one end that the connecting plate was kept away from to the assembly piece has seted up the linkage groove, the both ends of connecting plate are sliding connection respectively inside corresponding linkage groove, the inner wall in linkage groove all is fixed with the promotion spring, the other end of promotion spring all is fixed on the connecting plate.
Preferably, the limiting assembly comprises limiting plates which are slidably connected to two ends inside the prefabricated shell, a plurality of limiting holes corresponding to the reinforcing steel bars are formed in the limiting plates, two ends of the reinforcing steel bars are respectively and slidably connected to the corresponding limiting holes, supporting blocks fixed to the inner wall of the prefabricated shell are arranged above two ends of the limiting plates, rotating grooves are formed in one sides, close to the limiting plates, of the supporting blocks, rotating blocks are rotatably connected to the inside of the rotating grooves, connecting columns which are in rotating fit with the rotating grooves are fixed to one sides, close to the limiting plates, of the rotating blocks, clamping grooves corresponding to the connecting columns are formed in the limiting plates, one ends, far away from the supporting blocks, of the connecting columns penetrate through the corresponding clamping grooves and are fixed with supporting blocks, and the connecting columns and the clamping grooves are in rotating fit.
Preferably, the supporting block is a rectangular block, the length of the supporting block is greater than the width of the notch of the clamping groove, and the length of the notch of the clamping groove is greater than the length of the supporting block.
Preferably, the depth of the linkage groove is greater than that of the assembly groove.
Preferably, the prefabricated shell is of a semi-arc structure, and openings are formed in two ends of the prefabricated shell.
A construction method for a tunnel intersection advance support structure comprises the following steps:
s1: at the intersection of the tunnel, reinforcing steel bars are built for positioning, and the reinforcing steel bars are connected by adopting connecting bars, so that the tightness between the reinforcing steel bars is improved;
s2: the prefabricated plates are arranged outside the steel bars, the prefabricated shell is assembled by a plurality of prefabricated plates, and an injection hole is reserved at the top of the prefabricated shell;
s3: in the process of assembling the prefabricated shell, the limiting plate is used for limiting the reinforcing steel bars in the prefabricated shell, so that the stability of the reinforcing steel bars is improved;
s4: after the prefabricated shell is assembled, preparing concrete by using a stirrer, injecting the prepared concrete into the injection hole through a column machine, and performing plasticity on the injected concrete through the prefabricated shell;
s5: when sufficient concrete is injected into the prefabricated shell, and after 12 hours, regular watering maintenance can be carried out on the molded support inside the prefabricated shell;
s6: after watering and maintenance are finished, the stabilizing assembly in the prefabricated shell is adjusted and installed, and after the stabilizing assembly is installed, the prefabricated shell can be supported through the stabilizing assembly, so that the stability of the prefabricated shell is improved;
s7: when the average temperature of the support preparation environment is low, the formwork removal operation can be performed on the 25 th day after the concrete is poured, when the average temperature of the support preparation environment is high, the formwork removal operation can be performed on the 10 th day after the concrete is poured, and when the prefabricated shell is removed, the support preparation is successful.
In the invention:
1. the construction method is simple, the manufactured support can stably support the tunnel, the support part of the support structure can be simply and conveniently adjusted according to the adjustment requirements of workers, the working performance is high, the time required by construction is short, and the structure is convenient to use.
2. The invention can effectively limit the reinforcing steel bars used by the supporting structure, thereby avoiding the scattering of the reinforcing steel bars under the impact of concrete, further effectively improving the regularity of the reinforcing steel bars, further improving the supporting quality, and simply and conveniently disassembling the components of the supporting structure according to the disassembling and assembling requirements of users, and being convenient to use.
Drawings
Fig. 1 is a schematic structural diagram of a forepoling structure for a tunnel intersection according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is an enlarged view of a portion B of FIG. 1;
FIG. 4 is an enlarged view of a portion C of FIG. 1;
FIG. 5 is an enlarged view of a portion D of FIG. 1;
fig. 6 is a schematic view of a forepoling structure for a tunnel intersection according to the present invention.
Reference numbers in the figures: 1. prefabricating a shell; 2. reinforcing steel bars; 3. an injection hole; 4. mounting blocks; 5. connecting blocks; 6. a coupling block; 7. connecting grooves; 8. a loading slot; 9. a slider; 10. a clamping block; 11. A card slot; 12. a connecting spring; 13. a loading block; 14. accommodating grooves; 15. a stabilizing block; 16. A thread groove; 17. a screw rod; 18. a limiting block; 19. a slider; 20. a sliding groove; 21. a limiting groove; 22. a coupling groove; 23. a return spring; 24. a stabilizing slot; 25. a connecting plate; 26. a coupling plate; 27. assembling the block; 28. a linkage groove; 29. a push spring; 30. assembling a groove; 31. a limiting plate; 32. defining an aperture; 33. a clamping groove; 34. connecting columns; 35. a support block; 36. a rotating groove; 37. rotating the block; 38. and (7) supporting blocks.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 6, the advance support structure for the tunnel intersection comprises a prefabricated shell 1 assembled by a plurality of prefabricated plates, a plurality of steel bars 2 are arranged inside the prefabricated shell 1, an injection hole 3 is formed in the top of the prefabricated shell 1, the prefabricated shell 1 is provided with a stabilizing assembly for supporting the prefabricated shell 1, the prefabricated shell 1 is further provided with a limiting assembly for limiting the positions of the steel bars 2, and concrete can be injected into the prefabricated shell 1 through the injection hole 3.
The stabilizing component comprises a mounting block 4 fixed on the inner wall of the prefabricated shell 1, connecting blocks 5 are hinged on the outer sides of the mounting block 4, one ends of the two connecting blocks 5 are respectively provided with a connecting block 6, one end, close to the connecting block 5, of the connecting block 6 is provided with a connecting groove 7, one end, far away from the mounting block 4, of the connecting block 5 is respectively connected inside the corresponding connecting groove 7 in a sliding manner, the connecting block 5 positioned inside the connecting groove 7 is provided with a loading groove 8, two sides inside the loading groove 8 are respectively connected with a sliding block 9 in a sliding manner, a plurality of connecting springs 12 are arranged inside the loading groove 8, two ends of each connecting spring 12 are respectively fixed on the corresponding sliding block 9, one side, far away from the connecting spring 12, of each sliding block 9 is fixed with a clamping block 10, two sides, close to one end of the connecting block 5, of each clamping block 10 are respectively connected inside the corresponding clamping grooves 11, and the outer sides, far away from one end, far away from the connecting block 5, of the connecting block 6 are hinged with a loading block 13, loading block 13 is kept away from the one end of hookup piece 6 and has been seted up holding tank 14, and holding tank 14's inside sliding connection has stabilizing block 15, and a plurality of stable grooves 24 have been seted up to prefabricated casing 1's inboard, and stabilizing block 15 keeps away from the one end of loading block 13 and extends holding tank 14's outside and difference sliding connection inside corresponding stable groove 24, through stabilizing the subassembly, can support prefabricated casing 1 to improve prefabricated casing 1's stability ability.
The stabilizing block 15 positioned in the accommodating groove 14 is provided with a thread groove 16, the inside of the thread groove 16 is rotatably connected with a screw rod 17 through a bearing, the other end of the screw rod 17 extends out of the thread groove 16 and is respectively and rotatably connected on the inner wall of the corresponding accommodating groove 14 through the bearing, the outer wall of the screw rod 17 is fixedly sleeved with a limiting block 18 which is rotatably sleeved in the accommodating groove 14, one end of the loading block 13 close to the limiting block 18 is provided with a sliding groove 20, the inside of the sliding groove 20 is provided with a sliding block 19 in a sliding way, the sliding block 19 positioned in the accommodating groove 14 is provided with a limiting groove 21, the limiting block 18 is slidably connected in the limiting groove 21, the inner wall of the accommodating groove 14 is provided with a connecting groove 22 corresponding to the sliding block 19, the end part of the sliding block 19 positioned in the accommodating groove 14 is slidably connected in the connecting groove 22, and the end part of the sliding block 19 positioned outside the accommodating groove 14 is fixedly provided with a shifting block, a plurality of reset springs 23 are fixed on the shifting block, and the other ends of the reset springs 23 are fixed on the loading block 13.
The limiting block 18 is a rectangular block, the limiting groove 21 is a rectangular groove, and the limiting block 18 can be limited through the matching work of the limiting block 18 and the limiting groove 21, so that the rotation of the screw rod 17 is avoided, and the stability of the screw rod 17 is improved.
Load the outside of piece 13 and articulate through the hinge and have connecting plate 25, be equipped with connecting plate 26 between two connecting plates 25, connecting plate 25 is close to the one end of connecting plate 26 and has been seted up assembly groove 30, the inside sliding connection of assembly groove 30 has assembly block 27, assembly block 27 keeps away from the one end of connecting plate 25 and has been seted up linkage groove 28, sliding connection is inside corresponding linkage groove 28 respectively at the both ends of connecting plate 26, the inner wall of linkage groove 28 all is fixed with push spring 29, push spring 29's the other end is all fixed on connecting plate 26, through connecting plate 25, can avoid loading piece 13 to take place to rock, then effectual improvement loads the bearing capacity of piece 13.
The limiting component comprises limiting plates 31 which are connected with two ends inside the prefabricated shell 1 in a sliding manner, the limiting plates 31 are provided with a plurality of limiting holes 32 corresponding to the reinforcing steel bars 2, two ends of the reinforcing steel bars 2 are respectively connected inside the corresponding limiting holes 32 in a sliding manner, supporting blocks 35 which are fixed on the inner wall of the prefabricated shell 1 are arranged above the two ends of the limiting plates 31, one sides of the supporting blocks 35, which are close to the limiting plates 31, are provided with rotating grooves 36, rotating blocks 37 are rotatably connected inside the rotating grooves 36, connecting columns 34 which are matched with the rotating grooves 36 in a rotating manner are fixed on one sides of the rotating blocks 37, which are close to the limiting plates 31, the limiting plates 31 are provided with clamping grooves 33 corresponding to the connecting columns 34, one ends, which are far away from the supporting blocks 35, of the connecting columns 34 penetrate through the corresponding clamping grooves 33 and are fixed with supporting blocks 38, the connecting columns 34 and the clamping grooves 33 are matched in a rotating manner, and the limiting component can limit the reinforcing steel bars 2, thereby avoid reinforcing bar 2 to take place to scatter under the impact of concrete, effectual improvement reinforcing bar 2 regular degree then.
The supporting block 38 is a rectangular block, the length of the supporting block 38 is larger than the width of the notch of the clamping groove 33, the length of the notch of the clamping groove 33 is larger than the length of the supporting block 38, and the supporting block 38 can slide through the notch of the clamping groove 33, the length of which is larger than the length of the supporting block 38.
The depth of the linkage groove 28 is larger than that of the assembly groove 30, and the assembly block 27 can slide flexibly through the linkage groove 28 with the depth larger than that of the assembly groove 30.
A construction method for a tunnel intersection advance support structure comprises the following steps:
s1: at the intersection of the tunnel, reinforcing steel bars 2 are built for positioning, and connecting bars are adopted among the reinforcing steel bars 2 for connection, so that the tightness among the reinforcing steel bars 2 is improved;
s2: prefabricated plates are arranged outside the steel bars 2, the prefabricated shell 1 is assembled by a plurality of prefabricated plates, and an injection hole 3 is reserved at the top of the prefabricated shell 1;
s3: in the process of assembling the prefabricated shell 1, the limiting plate 31 is used for limiting the reinforcing steel bars 2 in the prefabricated shell 1, so that the stability of the reinforcing steel bars 2 is improved;
s4: after the prefabricated shell 1 is assembled, preparing concrete by using a stirrer, injecting the prepared concrete into the injection hole 3 through a column machine, and performing plasticity on the injected concrete through the prefabricated shell 1;
s5: when sufficient concrete is injected into the prefabricated shell 1, and after 12 hours, regular watering maintenance can be carried out on the molded support inside the prefabricated shell 1;
s6: after watering and maintenance are finished, the stabilizing assembly inside the prefabricated shell 1 is adjusted and installed, and after the stabilizing assembly is installed, the prefabricated shell 1 can be supported through the stabilizing assembly, so that the stability of the prefabricated shell 1 is improved;
s7: when the average temperature of the support preparation environment is low, the formwork removal operation can be performed on the 25 th day after the concrete is poured, and when the average temperature of the support preparation environment is high, the formwork removal operation can be performed on the 10 th day after the concrete is poured.
The working principle is as follows: the method comprises the steps of building steel bars 2 at a tunnel intersection for positioning, connecting the steel bars 2 by adopting connecting bars, improving the tightness between the steel bars 2, installing prefabricated plates outside the steel bars 2, fixing the prefabricated plates by screws or welding, assembling the prefabricated shell 1 by a plurality of prefabricated plates, reserving an injection hole 3 at the top of the prefabricated shell 1, placing a limiting plate 31 into the prefabricated shell 1 in the process of assembling the prefabricated shell 1, aligning the steel bars 2 to the limiting holes 32 on the limiting plate 31, inserting the steel bars 2 into the limiting holes 32, then rotating a support block 38, pushing the limiting plate 31 to drive the limiting plate 31 to displace when the support block 38 is superposed with a clamping groove 33, rotating the support block 38 when the clamping groove 33 on the limiting plate 31 passes through the support block 38, and further limiting the steel bars 2 in the prefabricated shell 1 when the support block 38 is staggered with the clamping groove 33, then the stability of the reinforcing steel bar 2 is improved, then the precast slab corresponding to the limiting plate 31 can be installed on the precast shell 1, then the mixer is used for preparing concrete, the prepared concrete is injected into the injection hole 3 through a column machine, the injected concrete is plasticized through the precast shell 1, when sufficient concrete is injected into the precast shell 1, after 12 hours, regular watering maintenance can be carried out on the forming support in the precast shell 1, after the watering maintenance is finished, the stabilizing component can be installed according to the use requirement of a user, at the moment, the loading block 13 can be pulled to drive the loading block 13 to deflect, when the loading block 13 is corresponding to the stabilizing groove 24, the sliding block 19 is pulled, when the limiting groove 21 is separated from the stabilizing block 18, the stabilizing block 15 can be pulled, when the stabilizing block 15 enters the corresponding stabilizing groove 24, the sliding block 19 is loosened, then the limiting groove 21 is reset to be sleeved outside the limiting block 18, at the moment, the stabilizing block 15 is fixed inside the stabilizing groove 24, then the assembling block 27 at one end of the connecting plate 26 is inserted into the assembling groove 30, then the assembling block 27 at the other end of the connecting plate 26 is pushed to drive the assembling block 27 at the other end of the connecting plate 26 to displace, after the assembling block 27 displaces to a proper position, a user can pull the connecting plate 25 to drive the connecting plate 25 to deflect, when the two connecting plates 25 are in the same horizontal state, the assembling block 27 is loosened, at the moment, the assembling block 27 resets, after the assembling block 27 at the other end of the connecting plate 26 enters the corresponding assembling groove 30, the stabilizing component is installed, at the moment, the prefabricated shell 1 can be supported through the stabilizing component, so that the stabilizing performance of the prefabricated shell 1 is improved, when the average temperature of the supported preparation environment is lower, the formwork removal work can be carried out on the 25 th day after concrete pouring, when the average temperature of the preparation environment of the support is high, the formwork removal work can be carried out on the 10 th day after the concrete pouring, and after the prefabricated shell 1 is removed, the support is successfully prepared, and when a user removes the prefabricated shell 1, the connecting block 6 needs to be removed from the mounting block 4, the user can press the sliding block 9 through the notch of the loading groove 8 to drive the clamping block 10 to displace, after the clamping block 10 is separated from the inside of the clamping groove 11, the user can pull the connecting block 6 to drive the connecting block 6 to displace, after the connecting groove 7 on the connecting block 6 is separated from the connecting block 5, the connecting block 6 is separated from the mounting block 4, at the moment, the user can conveniently carry out the detachment work on the prefabricated shell 1, and the use is convenient.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a be used for tunnel intersection advance support structure, includes prefabricated casing (1) of assembling by the polylith prefabricated plate, its characterized in that, the inside of prefabricated casing (1) is equipped with many reinforcing bars (2), injection hole (3) have been seted up at the top of prefabricated casing (1), prefabricated casing (1) is equipped with the stabilizing component who is used for supporting prefabricated casing (1), prefabricated casing (1) still is equipped with the limited subassembly that is used for injecing reinforcing bar (2) position.
2. The advance support structure for the tunnel intersection according to claim 1, wherein the stabilizing component comprises mounting blocks (4) fixed on the inner wall of the prefabricated shell (1), the outer sides of the mounting blocks (4) are hinged with connecting blocks (5), one ends of the two connecting blocks (5) are provided with connecting blocks (6), one end of each connecting block (6) close to the corresponding connecting block (5) is provided with a connecting groove (7), one end of each connecting block (5) far away from the mounting block (4) is respectively and slidably connected inside the corresponding connecting groove (7), the connecting block (5) inside the connecting groove (7) is provided with a loading groove (8), two sides inside the loading groove (8) are respectively and slidably connected with sliding blocks (9), the inside of the loading groove (8) is provided with a plurality of connecting springs (12), and two ends of each connecting spring (12) are respectively fixed on the corresponding sliding block (9), one side that connecting spring (12) was kept away from in slider (9) is fixed with fixture block (10), draw-in groove (11) have been seted up to connecting block (6) both sides that are close to connecting block (5) one end, fixture block (10) sliding connection respectively is inside corresponding draw-in groove (11), the outside that connecting block (5) one end was kept away from in connecting block (6) articulates through the hinge has loading block (13), loading block (13) keep away from the one end of connecting block (6) and seted up holding tank (14), the inside sliding connection of holding tank (14) has stable piece (15), a plurality of stable grooves (24) have been seted up to the inboard of prefabricated casing (1), the one end that loading block (13) were kept away from in stable piece (15) extends the outside of holding tank (14) and difference sliding connection is inside corresponding stable groove (24).
3. The advance support structure for the tunnel intersection according to claim 2, wherein a thread groove (16) is formed in the stabilizing block (15) positioned inside the accommodating groove (14), a lead screw (17) is rotatably connected inside the thread groove (16) through a bearing, the other end of the lead screw (17) extends out of the thread groove (16) and is respectively rotatably connected to the inner wall of the corresponding accommodating groove (14) through a bearing, a limiting block (18) rotatably sleeved inside the accommodating groove (14) is fixedly sleeved on the outer wall of the lead screw (17), a sliding groove (20) is formed in one end, close to the limiting block (18), of the loading block (13), a sliding block (19) is slidably arranged inside the sliding groove (20), a limiting groove (21) is formed in the sliding block (19) positioned inside the accommodating groove (14), and the limiting block (18) is slidably connected inside the limiting groove (21), the inner wall of holding tank (14) is seted up and is linked groove (22) corresponding with sliding block (19), is located inside sliding block (19) tip sliding connection of holding tank (14) inside in linked groove (22), is located outside sliding block (19) end fixing of holding tank (14) and has dialled the piece, it is fixed with a plurality of reset spring (23) to dial the piece, the other end of reset spring (23) is all fixed on loading piece (13).
4. A forepoling structure for tunnel intersections according to claim 3 characterized in that the limiting blocks (18) are rectangular blocks and the limiting grooves (21) are rectangular grooves.
5. The advance support structure for the tunnel intersection according to claim 2, wherein the outer side of the loading block (13) is hinged to a connecting plate (25) through a hinge, a connecting plate (26) is arranged between the two connecting plates (25), an assembling groove (30) is formed in one end, close to the connecting plate (26), of the connecting plate (25), the assembling block (27) is connected to the inside of the assembling groove (30) in a sliding mode, a linkage groove (28) is formed in one end, far away from the connecting plate (25), of the assembling block (27), two ends of the connecting plate (26) are connected to the inside of the corresponding linkage groove (28) in a sliding mode respectively, a pushing spring (29) is fixed to the inner wall of the linkage groove (28), and the other end of the pushing spring (29) is fixed to the connecting plate (26).
6. The advance support structure for the tunnel intersection according to claim 1, wherein the limiting component comprises limiting plates (31) which are slidably connected to two ends inside the prefabricated shell (1), the limiting plates (31) are provided with a plurality of limiting holes (32) corresponding to the reinforcing steel bars (2), two ends of the reinforcing steel bars (2) are respectively slidably connected to the corresponding limiting holes (32), supporting blocks (35) fixed on the inner wall of the prefabricated shell (1) are arranged above two ends of each limiting plate (31), one side of each supporting block (35) close to the limiting plate (31) is provided with a rotating groove (36), a rotating block (37) is rotatably connected inside each rotating groove (36), one side of each rotating block (37) close to the limiting plate (31) is fixed with a connecting column (34) which is rotatably matched with the rotating groove (36), the limiting plate (31) is provided with a clamping groove (33) corresponding to the connecting column (34), one end, far away from the supporting block (35), of the connecting column (34) penetrates through the corresponding clamping groove (33) and is fixed with a supporting block (38), and the connecting column (34) and the clamping groove (33) are in running fit.
7. A forepoling structure for tunnel intersections according to claim 6 characterized in that the said bracket (38) is a rectangular block, the length of the said bracket (38) is greater than the width of the notch of the said snap-in groove (33), the length of the notch of the said snap-in groove (33) is greater than the length of the said bracket (38).
8. A forepoling structure for tunnel intersections according to claim 5 wherein the depth of the cooperating grooves (28) is greater than the depth of the assembly grooves (30).
9. A forepoling structure for tunnel intersections according to claim 5 characterized in that the prefabricated shell (1) is a semi-arc structure, and both ends of the prefabricated shell (1) are opened.
10. A construction method for a tunnel intersection advance support structure comprises the following steps:
s1: at the intersection of the tunnel, reinforcing steel bars (2) are built for positioning, and connecting bars are adopted among the reinforcing steel bars (2) for connection, so that the tightness among the reinforcing steel bars (2) is improved;
s2: prefabricated plates are arranged outside the steel bars (2), a prefabricated shell (1) is assembled by a plurality of prefabricated plates, and an injection hole (3) is reserved at the top of the prefabricated shell (1);
s3: in the process of assembling the prefabricated shell (1), limiting the reinforcing steel bars (2) in the prefabricated shell (1) by using the limiting plates (31), so that the stability of the reinforcing steel bars (2) is improved;
s4: after the prefabricated shell (1) is assembled, preparing concrete by using a stirrer, injecting the prepared concrete into the injection hole (3) through a column machine, and performing plasticity on the injected concrete through the prefabricated shell (1);
s5: when sufficient concrete is injected into the prefabricated shell (1), and after 12 hours, regular watering maintenance can be carried out on the molded support in the prefabricated shell (1);
s6: after watering and maintenance are finished, the stabilizing assembly in the prefabricated shell (1) is adjusted and installed, and after the stabilizing assembly is installed, the prefabricated shell (1) can be supported through the stabilizing assembly, so that the stability of the prefabricated shell (1) is improved;
s7: when the average temperature of the support preparation environment is low, the formwork removal operation can be performed on the 25 th day after the concrete is poured, when the average temperature of the support preparation environment is high, the formwork removal operation can be performed on the 10 th day after the concrete is poured, and when the prefabricated shell (1) is removed, the support preparation is successful.
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| CN202111036773.1A CN113756836A (en) | 2021-09-06 | 2021-09-06 | Advanced support structure for tunnel intersection and construction method thereof |
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| CN202111036773.1A CN113756836A (en) | 2021-09-06 | 2021-09-06 | Advanced support structure for tunnel intersection and construction method thereof |
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