Flexible hinge formwork for continuous mould construction

Abstract

The flexible hinged formwork for continuous mold construction primary support concrete construction comprises a support frame provided with upper and lower sliding grooves, H-shaped guide rails extending in the front-rear direction and C-shaped guide rails extending in the left-right direction, a flexible hinged thin steel plate assembly, a side plate assembly and a top plate assembly arranged on the support frame, the flexible hinged thin steel plate assembly is horizontally arranged above the support frame, the side plate assembly is arranged on the left and right sides of the flexible hinged thin steel plate assembly and can be extended up and down, and the top plate assembly is arranged on the front side or the rear side of the flexible hinged thin steel plate assembly and can slide left and right and extend up and down; the flexible hinged thin steel plate assembly, the jacking oil cylinder and the bearing roller are connected to the support frame, the bearing roller is rotatably embedded in the H-shaped guide rail, the upper ends of the side plate assembly and the top plate assembly are respectively provided with first and second arc-shaped rubber plates, and a pouring hole is arranged on the top plate assembly, so that the flatness of the primary support mold construction surface can be ensured, slurry leakage can be avoided, the construction efficiency is high, and the pouring position is flexible.

Description

Technical Field

[0001] This invention relates to the field of continuous formwork technology in tunnel construction, specifically to a flexible hinged formwork for continuous formwork initial support concrete construction. Background Technology

[0002] The initial support of existing tunnels mostly adopts the construction process of wet spraying trolley shotcrete. During the spraying process, the amount of concrete rebound is large, resulting in poor flatness of the initial support surface. It is necessary to repeat the leveling process many times, which results in low construction efficiency. To solve this problem, a construction process of building a ring bushing casting mold has emerged. This process can form a flatter initial support surface through the casting mold. However, the overall structure of this type of casting mold is relatively complex, and the amount of engineering work for building and dismantling is large. Moreover, the casting window of this type of casting mold is fixed on the inner wall in the circumferential direction, and its position cannot be flexibly adjusted according to the casting situation. The actual casting effect is not good, and there is also a certain amount of grout leakage when the top is poured. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a flexible hinged formwork for continuous casting of initial support concrete.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is a flexible hinged formwork for continuous casting of initial support concrete, comprising: A support frame is provided with a sliding groove and a guide rail. The sliding groove is an upper and lower sliding groove, and the guide rail includes an H-shaped guide rail extending in the front-back direction and a C-shaped guide rail extending in the left-right direction. The flexible hinged thin steel plate assembly, side plate assembly and top plate assembly are mounted on the support frame. The flexible hinged thin steel plate assembly is placed flat on top of the support frame. The side plate assembly is located on the left and right sides of the flexible hinged thin steel plate assembly and can extend and retract vertically. The top plate assembly is located on the front or rear side of the flexible hinged thin steel plate assembly and can slide left and right and extend and retract vertically. The flexible hinged thin steel plate assembly is connected to the support frame via a clamping cylinder and bearing rollers. The clamping cylinder is used to lift the middle part of the flexible hinged thin steel plate assembly upwards. The bearing rollers are connected to the four corners below the flexible hinged thin steel plate assembly and are rotatably embedded in the H-shaped guide rail. The side plate assembly is slidably embedded in the upper and lower sliding grooves of the support frame, and its upper end is a first arc-shaped rubber plate. The top plate assembly is connected to the roller assembly via an adjusting screw. The roller assembly can slide left and right along the C-shaped guide rail of the support frame. The adjusting screw can make the top plate assembly extend and retract up and down. The upper end of the top plate assembly is a second arc-shaped rubber plate, and the top plate assembly has a casting hole.

[0005] Preferably, the flexible hinged thin steel plate assembly includes a bottom support thin steel plate and an inner lining sliding plate. The inner lining sliding plate is connected to the top surface of the bottom support thin steel plate and is in close contact with the bottom support thin steel plate. The inner lining sliding plate is located on the side of the flexible hinged thin steel plate assembly facing the concrete.

[0006] More preferably, the inner lining slide plate is provided with bolt holes, and bolts are inserted into the bolt holes. The ends of the bolts are threadedly connected to the bottom support thin steel plate, and the inner lining slide plate and the bottom support thin steel plate can bend synchronously through the gap between the bolts and the bolt holes.

[0007] More preferably, the flexible hinged thin steel plate assembly further includes arc-shaped constraint angle steel blocks, which are connected to the bottom surface of the bottom support thin steel plate and located at its left and right edges. There are multiple arc-shaped constraint angle steel blocks arranged at intervals. When the bottom support thin steel plate bends to the maximum design deflection, adjacent arc-shaped constraint angle steel blocks abut against each other to improve the overall bending strength of the flexible hinged thin steel plate assembly.

[0008] More preferably, the flexible hinged thin steel plate assembly further includes reinforcing rib square tubes to enhance the overall strength and rigidity of the bottom support thin steel plate. The reinforcing rib square tubes extend in the front-back direction and are located below the bottom support thin steel plate. There are multiple reinforcing rib square tubes, which are spaced apart in the left-right direction.

[0009] More preferably, roller brackets are connected to the reinforcing square tubes on both sides, and the bearing rollers are rotatably disposed on the left and right sides of the roller brackets.

[0010] Preferably, the top plate assembly includes a movable top plate located below the second arc-shaped rubber plate, the adjusting screw extends in the vertical direction, its upper end is rotatably connected to the outer side wall of the movable top plate, its lower end is threadedly connected to the wheel seat of the roller assembly, and a nut is threadedly connected to the adjusting screw, the nut abutting against the wheel seat.

[0011] Preferably, the upper ends of the first arc-shaped rubber plate and the second arc-shaped rubber plate are provided with finger-shaped cutting grooves, and there are multiple cutting grooves that are spaced apart along the length direction of the first arc-shaped rubber plate and the second arc-shaped rubber plate.

[0012] Preferably, the support frame is provided with side plate assembly telescopic adjustment cylinders on both sides. The cylinder body of the side plate assembly telescopic adjustment cylinder is fixedly connected to the support foot of the support frame. The piston rod end of the side plate assembly telescopic adjustment cylinder is rotatably connected to the side ear seat on the outer wall of the side plate assembly. The neck of the side plate assembly telescopic adjustment cylinder is fitted with a telescopic first dust cover.

[0013] Preferably, an L-shaped clamping cylinder mounting seat is suspended in the middle of the front and rear sides of the support frame. The cylinder body of the clamping cylinder is fixedly connected to the clamping cylinder mounting seat. The piston rod end of the clamping cylinder is rotatably connected to the reinforcing rib square tube in the middle of the bottom support thin steel plate. A retractable second dust cover is fitted on the neck of the clamping cylinder.

[0014] Due to the application of the above-mentioned technical solution, the present invention has the following advantages compared with the prior art: 1. The flexible hinged thin steel plate assembly can be driven to produce a cylindrical bend by the rolling of the bearing roller in the H-shaped guide rail through the tightening cylinder, thereby adaptively conforming to the arc surface of the tunnel and ensuring the flatness of the initial formwork surface.

[0015] 2. The side plate and top plate components can be extended and retracted vertically, and the arc-shaped rubber plate can be used to compensate for the gap between the side plate and top plate components and the uneven surface of the tunnel, thus avoiding grout leakage. This results in high construction efficiency and flexible pouring position. Attached Figure Description

[0016] Figures 1 to 4 This is a three-dimensional schematic diagram of a preferred embodiment of the present invention.

[0017] Figure 5 yes Figure 1 A top-down view.

[0018] Figure 6 yes Figure 5 Cross-sectional view along the AA direction.

[0019] Figure 7 yes Figure 5 Cross-sectional view along the BB direction.

[0020] Figure 8 yes Figure 3 A schematic diagram with some components hidden.

[0021] Figure 9 yes Figure 1 A 3D diagram of the back of the inner lining of the skateboard.

[0022] The components include: 10. Support frame; 11. Crossbeam; 12. Longitudinal beam; 13. Support foot; 14. Upper and lower sliding grooves; 15. H-shaped guide rail; 16. C-shaped guide rail; 17. Tightening cylinder mounting base; 20. Flexible hinged thin steel plate assembly; 21. Bottom support thin steel plate; 22. Reinforcing square tube; 221. Roller bracket; 23. Arc-shaped restraint angle steel block; 24. Inner lining sliding plate; 241. Groove; 25. Tightening cylinder; 251. Cylinder body; 252. Piston. 253. Rod; 26. Second dust cover; 30. Bearing roller; 31. Side plate assembly; 32. First arc-shaped rubber plate; 33. Cutting groove; 44. Side ear seat; 45. Top plate assembly; 46. Adjusting screw; 47. Nut; 48. Roller assembly; 49. Wheel seat; 40. Second arc-shaped rubber plate; 41. Pouring hole; 42. Movable top plate; 53. Side plate assembly telescopic adjustment cylinder; 54. Cylinder body; 55. Piston rod; 56. First dust cover. Detailed Implementation

[0023] like Figures 1 to 9 As shown, the flexible hinged formwork for continuous formwork initial support concrete construction provided by the present invention includes: a support frame 10 and a flexible hinged thin steel plate assembly 20, a side plate assembly 30, and a top plate assembly 40 disposed on the support frame 10. The support frame 10 includes a U-shaped frame with a crossbeam 11 and a longitudinal beam 12, and four support legs 13 supporting the frame. The support frame 10 is provided with an upper and lower sliding groove 14, a short H-shaped guide rail 15 extending in the front-to-back direction, and a long C-shaped guide rail 16 extending in the left-to-right direction. The flexible hinged thin steel plate assembly 20 is placed flat above the support frame 10. The flexible hinged thin steel plate assembly 20 is connected to the support frame 10 via a tightening cylinder 25 and bearing rollers 26. The tightening cylinder 25 is used to lift the middle part of the flexible hinged thin steel plate assembly 20 upwards, and the bearing rollers 26 are connected to the flexible hinged thin steel plate assembly 20. The four corners below the thin steel plate assembly 20 are rotatably embedded in the H-shaped guide rail 15; the side plate assembly 30 is located on the left and right sides of the flexible hinged thin steel plate assembly 20 and can extend and retract vertically. Specifically, the front and rear ends of the side plate assembly 30 are slidably embedded in the upper and lower sliding grooves 14 of the support frame 10, and the upper end of the side plate assembly 30 is a first arc-shaped rubber plate 31; the top plate assembly 40 is located on the front side of the flexible hinged thin steel plate assembly 20 and can slide left and right and extend and retract vertically. Specifically, the top plate assembly 40 is connected to the roller assembly 42 through the adjusting screw 41. The roller assembly 42 can slide left and right along the C-shaped guide rail 16 of the support frame 10. The adjusting screw 41 can make the top plate assembly 40 extend and retract vertically. The upper end of the top plate assembly 40 is a second arc-shaped rubber plate 43, and a casting hole 44 is opened on the top plate assembly 40.

[0024] The advantages of this design are that it can both use the sliding motion of the hydraulic cylinder and bearing rollers within the H-shaped guide rail to drive the flexible hinged thin steel plate assembly to produce a cylindrical bend to adapt to and fit the curved surface of the tunnel, ensuring the flatness of the initial formwork surface, and use the vertical expansion and contraction of the side plate assembly and top plate assembly to compensate for the gaps between the side plate assembly, top plate assembly and the uneven surface of the tunnel using the first and second arc-shaped rubber plates, avoiding grout leakage, resulting in high construction efficiency and flexible pouring position.

[0025] In this embodiment, the flexible hinged thin steel plate assembly 20 includes a bottom support thin steel plate 21, a reinforcing square tube 22, an arc-shaped constraint angle steel block 23, and an inner lining sliding plate 24. The inner lining sliding plate 24 is connected to the top surface of the bottom support thin steel plate 21 and is in close contact with the bottom support thin steel plate 21. The inner lining sliding plate 24 is located on the side of the flexible hinged thin steel plate assembly 20 facing the concrete. The inner lining sliding plate 24 is provided with bolt holes, and bolts are inserted into the bolt holes. The ends of the bolts are threadedly connected to the bottom support thin steel plate 21. The inner lining sliding plate 24 and the bottom support thin steel plate 21 can achieve synchronous bending through the gap between the bolts and the bolt holes. To facilitate bending, the surface of the inner lining sliding plate 24 facing the bottom support thin steel plate 21 is further provided with multiple grooves 2 that run through the left and right directions. 41; Arc-shaped constraint angle steel blocks 23 are connected to the bottom surface of the bottom support thin steel plate 21 and are located at the edges of the left and right sides of the bottom support thin steel plate 21. There are multiple arc-shaped constraint angle steel blocks 23 and they are spaced apart. When the bottom support thin steel plate 21 bends to the maximum design deflection, the adjacent arc-shaped constraint angle steel blocks 23 abut against each other to improve the overall bending strength of the flexible hinge thin steel plate assembly 20. The reinforcing rib square tube 22 is used to strengthen the overall strength and rigidity of the bottom support thin steel plate 21. The reinforcing rib square tube 22 extends in the front-back direction and is located below the bottom support thin steel plate 21. There are three reinforcing rib square tubes 22 and they are spaced apart in the left-right direction. Roller brackets 221 are connected to the reinforcing rib square tubes 22 on both sides. The bearing rollers 26 are rotatably arranged on the left and right sides of the roller brackets 221.

[0026] In this embodiment, the top plate assembly 40 includes a movable top plate 45 located below the second arc-shaped rubber plate 43. An adjusting screw 41 extends in the vertical direction, with its upper end rotatably connected to the outer side wall of the movable top plate 45, and its lower end threadedly connected to the wheel seat 421 of the roller assembly 42. A nut 411 is threadedly connected to the adjusting screw 41, and the nut 411 abuts against the wheel seat 421 to achieve locking.

[0027] To achieve a better fit, in this embodiment, the upper ends of the first arc-shaped rubber plate 31 and the second arc-shaped rubber plate 43 are provided with finger-shaped cutting grooves 32. There are multiple cutting grooves 32, which are spaced apart along the length direction of the first arc-shaped rubber plate 31 and the second arc-shaped rubber plate 43.

[0028] In this embodiment, the left and right sides of the support frame 10 are provided with side plate assembly telescopic adjustment cylinders 50. The cylinder body 51 of the side plate assembly telescopic adjustment cylinder 50 is fixedly connected to the support foot 13 of the support frame 10. The end of the piston rod 52 of the side plate assembly telescopic adjustment cylinder 50 is rotatably connected to the side ear seat 33 on the outer wall of the side plate assembly 30. The neck of the side plate assembly telescopic adjustment cylinder 50 is fitted with a retractable first dust cover 53.

[0029] In this embodiment, an L-shaped clamping cylinder mounting seat 17 is suspended in the middle of the front and rear sides of the support frame 10. The cylinder body 251 of the clamping cylinder 25 is fixedly connected to the clamping cylinder mounting seat 17. The end of the piston rod 252 of the clamping cylinder 25 is rotatably connected to the reinforcing rib square tube 22 in the middle of the bottom support thin steel plate 21. A retractable second dust cover 253 is fitted on the neck of the clamping cylinder 25.

[0030] To facilitate the construction of the corresponding mechanical mechanism and power unit for connection with the robotic arm, the support frame 10 is also equipped with a corresponding installation platform (not shown in the figure).

[0031] The flexible hinged formwork for continuous casting initial support concrete construction provided by this invention can adapt to the shape of the tunnel arc surface by driving the bottom support thin steel plate and the inner lining sliding plate of the flexible hinged thin steel plate assembly to produce a cylindrical bend through the tightening cylinder, so as to realize adaptive casting for tunnel circumferential construction; at the same time, the bottom support plate facing the concrete side is the sliding plate, which facilitates smooth demolding.

[0032] The workflow of the preferred embodiment of this application is described below: a. The extension of the top-tightening cylinder causes the bottom support thin steel plate and the inner lining sliding plate to deform and fit into the tunnel section. The roller brackets and bearing rollers on both sides of the bottom surface of the bottom support thin steel plate run towards the middle in the H-shaped guide rail. b. Under the action of the side plate assembly telescopic adjustment cylinder, the side plate assembly extends or retracts along the upper and lower sliding grooves, so that the first arc-shaped rubber plate seals the gap between the tunnel section and the side plate assembly. c. Press the left side of the support frame onto the leveled initial support surface, adjust the height of the top plate assembly so that the second arc-shaped rubber plate connected to its upper end presses against the tunnel wall to seal the gap between the tunnel section and the top plate assembly. d. Inject concrete through the pouring hole. When the concrete has initially set, move the top plate assembly to fill the inner lining slide plate of the flexible hinged thin steel plate assembly with concrete. After it has initially set, move the support frame circumferentially along the initial support surface. While moving, continue to inject concrete through the pouring hole to pour the next piece. e. The overall construction process begins with casting from the arch foot to the arch top on both sides of the tunnel, and finally, the tunnel is sealed with casting at the top.

[0033] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A flexible hinged formwork for continuous casting initial support concrete construction, comprising: A support frame is provided with a sliding groove and a guide rail. The sliding groove is an upper and lower sliding groove, and the guide rail includes an H-shaped guide rail extending in the front-back direction and a C-shaped guide rail extending in the left-right direction. The flexible hinged thin steel plate assembly, side plate assembly and top plate assembly are mounted on the support frame. The flexible hinged thin steel plate assembly is placed flat on top of the support frame. The side plate assembly is located on the left and right sides of the flexible hinged thin steel plate assembly and can extend and retract vertically. The top plate assembly is located on the front or rear side of the flexible hinged thin steel plate assembly and can slide left and right and extend and retract vertically. Its features are: The flexible hinged thin steel plate assembly is connected to the support frame via a clamping cylinder and bearing rollers. The clamping cylinder is used to lift the middle part of the flexible hinged thin steel plate assembly upwards. The bearing rollers are connected to the four corners below the flexible hinged thin steel plate assembly and are rotatably embedded in the H-shaped guide rail. The side plate assembly is slidably embedded in the upper and lower sliding grooves of the support frame, and its upper end is a first arc-shaped rubber plate. The top plate assembly is connected to the roller assembly via an adjusting screw. The roller assembly can slide left and right along the C-shaped guide rail of the support frame. The adjusting screw can make the top plate assembly extend and retract up and down. The upper end of the top plate assembly is a second arc-shaped rubber plate, and the top plate assembly has a casting hole.

2. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 1, characterized in that: The flexible hinged thin steel plate assembly includes a bottom support thin steel plate and an inner lining sliding plate. The inner lining sliding plate is connected to the top surface of the bottom support thin steel plate and is attached to the bottom support thin steel plate. The inner lining sliding plate is located on the side of the flexible hinged thin steel plate assembly facing the concrete.

3. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 2, characterized in that: The inner lining slide plate is provided with bolt holes, and bolts are inserted into the bolt holes. The ends of the bolts are threadedly connected to the bottom support thin steel plate. The inner lining slide plate and the bottom support thin steel plate can bend synchronously through the gap between the bolts and the bolt holes.

4. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 2, characterized in that: The flexible hinged thin steel plate assembly also includes arc-shaped constraint angle steel blocks, which are connected to the bottom surface of the bottom support thin steel plate and located at its left and right edges. There are multiple arc-shaped constraint angle steel blocks arranged at intervals. When the bottom support thin steel plate bends to the maximum design deflection, adjacent arc-shaped constraint angle steel blocks abut against each other to improve the overall bending strength of the flexible hinged thin steel plate assembly.

5. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 4, characterized in that: The flexible hinged thin steel plate assembly also includes reinforcing rib square tubes to enhance the overall strength and rigidity of the bottom support thin steel plate. The reinforcing rib square tubes extend in the front-back direction and are located below the bottom support thin steel plate. There are multiple reinforcing rib square tubes, which are spaced apart in the left-right direction.

6. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 5, characterized in that: Roller brackets are connected to the reinforcing square tubes on both sides, and the bearing rollers are rotatably arranged on the left and right sides of the roller brackets.

7. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 1, characterized in that: The top plate assembly includes a movable top plate located below the second arc-shaped rubber plate. The adjusting screw extends in the vertical direction, with its upper end rotatably connected to the outer side wall of the movable top plate and its lower end threadedly connected to the wheel seat of the roller assembly. A nut is threadedly connected to the adjusting screw, and the nut abuts against the wheel seat.

8. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 1, characterized in that: The upper ends of the first arc-shaped rubber plate and the second arc-shaped rubber plate are provided with finger-shaped cutting grooves. There are multiple cutting grooves, which are spaced apart along the length direction of the first arc-shaped rubber plate and the second arc-shaped rubber plate.

9. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 1, characterized in that: The support frame is provided with side plate assembly telescopic adjustment cylinders on both sides. The cylinder body of the side plate assembly telescopic adjustment cylinder is fixedly connected to the support foot of the support frame. The piston rod end of the side plate assembly telescopic adjustment cylinder is rotatably connected to the side ear seat on the outer wall of the side plate assembly. The neck of the side plate assembly telescopic adjustment cylinder is fitted with a telescopic first dust cover.

10. The flexible hinged formwork for continuous casting initial support concrete construction according to claim 1, characterized in that: The support frame has an L-shaped clamping cylinder mounting seat suspended in the middle of the front and rear sides. The cylinder body of the clamping cylinder is fixedly connected to the clamping cylinder mounting seat. The piston rod end of the clamping cylinder is rotatably connected to the reinforcing rib square tube in the middle of the bottom support thin steel plate. The neck of the clamping cylinder is fitted with a retractable second dust cover.

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