Box culvert jacking side wall resistance simulation test bed

Abstract

The utility model relates to box culvert jacking technical field discloses a box culvert jacking lateral wall resistance simulation test board, including test board body, the upper surface of test board body all is fixedly connected with two groups of baffle, the inner wall sliding of baffle is connected with the guide column, the right side outer wall of guide column is fixedly connected with the test board, the outer wall of baffle is fixedly connected with electric push rod no.

Description

Technical Field

[0001] This utility model relates to the field of box culvert jacking technology, and in particular to a test bench for simulating the side wall resistance of box culvert jacking. Background Technology

[0002] Box culverts are underground or elevated rectangular or square tubular structures used in water conservancy, transportation and other engineering projects. They mainly serve the functions of water conveyance, drainage, passage or passage through obstacles, and their cross-sections are mostly rectangular or square, consisting of a top slab, a bottom slab and side walls to form a closed structure.

[0003] In the jacking construction of box culverts, the interaction between the sidewall and the surrounding soil is the core factor affecting the jacking force, structural stability and construction safety. The core purpose of using the resistance simulation test bench is to accurately simulate the soil resistance characteristics of the box culvert sidewall during the jacking process, and avoid errors caused by relying solely on empirical formulas or theoretical calculations, which may result in insufficient or excessive estimation of the jacking force.

[0004] In related technologies, test benches typically use welding to fix test materials for simulating different geological conditions. However, when performing sidewall resistance simulation tests, multiple tools are required for disassembly and assembly each time the test material is replaced, which increases replacement time and reduces test efficiency. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a test bench for simulating the resistance of the side wall of a box culvert jacking, which aims to solve the problem in related technologies that the replacement of test materials requires the use of multiple tools for disassembly and assembly, resulting in increased replacement time and reduced test efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A test bench for simulating the sidewall resistance of a box culvert jacking includes a test bench body. Two sets of baffles are fixedly connected to the upper surface of the test bench body. Guide columns are slidably connected to the inner walls of the baffles. A test plate is fixedly connected to the right outer wall of the guide columns. An electric push rod is fixedly connected to the outer wall of the baffles. A cross block is fixedly installed at the output end of the electric push rod. A positioning column is fixedly connected to the right outer wall of the cross block. A sleeve is slidably connected to the outer wall of the positioning column. A push plate is fixedly connected to the right outer wall of the sleeve. The right outer wall of the push plate is in contact with the left outer wall of the test plate. A rotating rod is rotatably connected to the outer wall of the cross block. A sliding column is fixedly connected to the inner wall of the rotating rod. Both ends of the sliding column are slidably connected to the inner wall of the push plate. Rollers are rotatably connected to the outer wall of the sliding column. The outer walls of the rollers are slidably connected to the inner wall of the push plate.

[0008] The above technical solution achieves the following: The electric push rod drives the cross block to slide simultaneously, causing the positioning column to slide synchronously. The positioning column slides on the inner wall of the sleeve, and the sleeve is fixed to the outer wall of the push plate, preventing the cross block from shifting. The electric push rod then drives the cross block to slide on the inner wall of the push plate, where a sliding column fixed to the inner wall slides on the inner wall of the push plate. A roller rotating on the outer wall of the sliding column rotates on the inner wall of the push plate, preventing the rotating column from falling off. Installing the test plate onto the outer wall of the push plate, allowing it to pass through the baffle and push plate, causes the test plate and push plate to shift during movement. A spring installed on the inner wall of the guide column pushes a locking block to hold the push plate in place, enabling rapid installation of the test plate.

[0009] Preferably, the inner wall of the guide post is provided with a spring, the outer wall of the spring is fixedly connected with a locking block, the outer wall of the locking block is slidably connected to the inner wall of the guide post, one side of the outer wall of the locking block is an inclined surface, and the other side of the outer wall of the locking block is engaged with the left outer wall of the push plate.

[0010] Preferably, the lower surface of the test plate is slidably connected to the upper surface of the test bench body, the lower surface of the push plate is slidably connected to the upper surface of the test bench body, a plurality of positioning blocks are fixedly connected to the upper surface of the test bench body, a box culvert body is provided on the upper surface of the test bench body, and the outer wall of the box culvert body is slidably connected to the outer wall of the positioning blocks.

[0011] Preferably, a fixing plate is fixedly connected to the upper surface of the test bench body, a left support plate is snapped into the inner wall of the fixing plate, and a support block is provided on the outer wall of the support plate.

[0012] Preferably, multiple sets of electric push rods are fixedly connected to the outer wall of the support plate on the right side, and a push block is fixedly provided at the output end of the electric push rod. The right outer wall of the push block is in contact with the left outer wall of the box culvert body.

[0013] Preferably, the inner wall of the push block is rotatably connected to a connecting block, the outer wall of the connecting block is rotatably connected to the inner wall of the box culvert body, the inner wall of the box culvert body is provided with bolts, and the outer wall of the bolts is threadedly connected to the inner wall of the connecting block.

[0014] Preferably, an installation plate is fixedly connected to the upper surface of the test bench body, a top plate is provided on the inner wall of the installation plate, the outer wall of the top plate away from the installation plate is snapped into the inner wall of the fixed plate, two sets of hollow columns are fixedly connected to the inner walls of the fixed plate and the installation plate respectively, and a tie rod is slidably connected to the inner wall of the hollow column.

[0015] Preferably, a fixing post is fixedly connected to the left outer wall of the pull rod, the outer wall of the fixing post is slidably connected to the inner wall of the hollow column, the outer wall of the fixing post is snapped into the inner wall of the top plate, a second spring is provided on the inner wall of the fixing post, and the right outer wall of the second spring is fixedly connected to the inner wall of the hollow column.

[0016] This utility model has the following beneficial effects:

[0017] 1. In this utility model, test plates of different materials are installed on the outer wall of the push plate. Then, the electric push rod is started to push the cross block to slide while driving the rotating rod to rotate. The cross block will drive the positioning column into the sleeve, so that the electric push rod and the push plate push the push plate to slide synchronously. The test plates can be quickly replaced with different types of materials to conduct resistance tests, thereby improving the efficiency of testing and disassembly.

[0018] 2. In this utility model, the electric push rod 2 pushes the push block to slide while simultaneously causing the box culvert body to slide. The push block is connected to the box culvert body through a connecting block and bolts. The installation of the top plate causes the spring 2 to push the fixing column into the inner wall of the top plate. The top plate can prevent tilting while conducting resistance tests on the top, thus maintaining test accuracy while increasing test diversity. Attached Figure Description

[0019] Figure 1 This is a perspective view of a test bench for simulating the side wall resistance of a box culvert jacking according to the present invention.

[0020] Figure 2 This is a partial structural diagram of the cross block of a test bench for simulating the side wall resistance of a box culvert jacking, as proposed in this utility model.

[0021] Figure 3 This is a schematic diagram of a partial structure of the sliding column of a test bench for simulating the side wall resistance of a box culvert jacking, as proposed in this utility model.

[0022] Figure 4 This is a partial structural diagram of the guide column of a test bench for simulating the side wall resistance of a box culvert jacking, as proposed in this utility model.

[0023] Figure 5 This is a partial structural diagram of the positioning block of a test bench for simulating the side wall resistance of a box culvert jacking, as proposed in this utility model.

[0024] Figure 6 This is a partial structural diagram of the pusher block of a test bench for simulating the side wall resistance of a box culvert jacking, as proposed in this utility model.

[0025] Figure 7 This is a partial structural diagram of the fixed column of a test bench for simulating the side wall resistance of a box culvert jacking, as proposed in this utility model.

[0026] Legend:

[0027] 1. Test bench body; 2. Baffle; 3. Guide column; 4. Test plate; 5. Electric push rod one; 6. Cross block; 7. Rotating rod; 8. Positioning column; 9. Sleeve; 10. Push plate; 11. Sliding column; 12. Roller; 13. Spring one; 14. Locking block; 15. Positioning block; 16. Box culvert body; 17. Fixing plate; 18. Support plate; 19. Support block; 20. Electric push rod two; 21. Push block; 22. Connecting block; 23. Bolt; 24. Mounting plate; 25. Top plate; 26. Hollow column; 27. Tie rod; 28. Fixing column; 29. ​​Spring two. Detailed Implementation

[0028] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] Reference Figures 1-4 This utility model provides an embodiment of a test bench for simulating the side wall resistance of a box culvert jacking, comprising a test bench body 1. Two sets of baffles 2 are fixedly connected to the upper surface of the test bench body 1. Guide columns 3 are slidably connected to the inner walls of the baffles 2. A test plate 4 is fixedly connected to the right outer wall of the guide columns 3. An electric push rod 5 is fixedly connected to the outer wall of the baffles 2. A cross block 6 is fixedly installed at the output end of the electric push rod 5. A positioning column 8 is fixedly connected to the right outer wall of the cross block 6. A sleeve 9 is slidably connected to the outer wall of the positioning column 8. A push plate 10 is fixedly connected to the right outer wall of the sleeve 9. The wall is attached to the left outer wall of the test plate 4. The outer wall of the cross block 6 is rotatably connected to the rotating rod 7. The inner wall of the rotating rod 7 is fixedly connected to the sliding column 11. Both the left and right ends of the sliding column 11 are slidably connected to the inner wall of the push plate 10. The outer wall of the sliding column 11 is rotatably connected to the roller 12. The outer wall of the roller 12 is slidably connected to the inner wall of the push plate 10. The inner wall of the guide column 3 is provided with a spring 13. The outer wall of the spring 13 is fixedly connected to the locking block 14. The outer wall of the locking block 14 is slidably connected to the inner wall of the guide column 3. One side of the outer wall of the locking block 14 is an inclined surface. The other side of the outer wall of the locking block 14 is locked to the left outer wall of the push plate 10.

[0030] Specifically, based on the required resistance, test plates 4 made of different materials are installed on the outer wall of the push plate 10. Simultaneously, the test plate 4 drives the guide post 3 through the push plate 10 and connects to the baffle 2. The baffle 2 is fixed to the upper surface of the test bench body 1, preventing the push plate 10 and test plate 4 from shifting. When the test plate 4 is installed on the outer wall of the push plate 10, the spring 13 installed on the inner wall of the guide post 3 pushes the locking block 14 to lock the push plate 10, ensuring a tight fit between the push plate 10 and the test plate 4, preventing the test plate 4 from falling off. One inclined side of the locking block 14 facilitates installation, while the other side allows for easy pressing to release the self-locking mechanism. When the box culvert body 16 passes the test plate 4, the electric push rod 5 is pushed, causing the cross block 6 to slide, simultaneously driving... Positioning pin 8 slides on the inner wall of sleeve 9, while sleeve 9 is fixed on the outer wall of push plate 10, enabling cross block 6 to achieve a stable pushing and pulling effect. Cross block 6 drives rotating rod 7 to rotate, causing rotating rod 7 to drive sliding column 11 to slide on the inner wall of push plate 10. Sliding column 11 will drive roller 12 to rotate on the inner wall of push plate 10. When the right outer wall of cross block 6 is in contact with the left outer wall of sleeve 9, rotating rod 7 will drive roller 12 to abut against push plate 10. At this time, test plate 4 is in contact with box culvert body 16. Electric push rod 5 pushes cross block 6, enabling test plate 4 to be evenly stressed on the outer wall of box culvert body 16, thereby improving the resistance test accuracy. Furthermore, by changing test plate 4 of different materials, the effect of simulating the pushing resistance of box culvert body 16 in different environments can be achieved.

[0031] Example 1:

[0032] Reference Figure 1 , Figure 5 and Figure 6 The lower surface of the test plate 4 is slidably connected to the upper surface of the test bench body 1, and the lower surface of the push plate 10 is slidably connected to the upper surface of the test bench body 1. Multiple sets of positioning blocks 15 are fixedly connected to the upper surface of the test bench body 1. A box culvert body 16 is provided on the upper surface of the test bench body 1. The outer wall of the box culvert body 16 is slidably connected to the outer wall of the positioning blocks 15. A fixing plate 17 is fixedly connected to the upper surface of the test bench body 1. A left-side support plate 18 is snapped into the inner wall of the fixing plate 17. The outer wall is provided with a support block 19. Multiple sets of electric push rods 20 are fixedly connected to the outer wall of the right support plate 18. A push block 21 is fixedly provided at the output end of the electric push rod 20. The right outer wall of the push block 21 is in contact with the left outer wall of the box culvert body 16. A connecting block 22 is rotatably connected to the inner wall of the push block 21. The outer wall of the connecting block 22 is rotatably connected to the inner wall of the box culvert body 16. A bolt 23 is provided on the inner wall of the box culvert body 16. The outer wall of the bolt 23 is threadedly connected to the inner wall of the connecting block 22.

[0033] Specifically, by installing the left support plate 18, which has multiple sets of support blocks 19, onto the inner wall of the fixed plate 17, and then installing the right support plate 18, which has multiple sets of electric push rods 20, onto the right outer wall of the support block 19, the electric push rods 20 can achieve a stable pushing effect. When it is necessary to adjust the position of the electric push rods 20, the new left support plate 18, which has support blocks 19, can be installed onto the right outer wall of the support block 19, and then the new support block 19 can be placed against the outer wall of the right support plate 18, allowing the electric push rods 20 to quickly adjust their position. The push rods 20 then push the push block 2. 1. Sliding allows the pusher block 21 to push the box culvert body 16 to slide synchronously on the upper surface of the test platform body 1, thereby allowing the box culvert body 16 to simulate the jacking resistance test on the outer wall of the test plate 4. When the connecting block 22 rotating on the outer wall of the pusher block 21 is installed on the inner wall of the box culvert body 16, and the box culvert body 16 and the connecting block 22 are connected by bolts 23, the box culvert body 16 can be stably retracted, achieving the effect of facilitating repeated sliding tests. When the box culvert body 16 slides, the positioning block 15 fixed on the upper surface of the test platform body 1 will push and guide the box culvert body 16, which can achieve the effect of preventing the box culvert body 16 from deviating.

[0034] Example 2:

[0035] Reference Figure 5 and Figure 7 The upper surface of the test bench body 1 is fixedly connected to the mounting plate 24. The inner wall of the mounting plate 24 is provided with a top plate 25. The outer wall of the top plate 25 away from the mounting plate 24 is snapped into the inner wall of the fixed plate 17. The inner walls of the fixed plate 17 and the mounting plate 24 are respectively fixedly connected to two sets of hollow columns 26. The inner wall of the hollow column 26 is slidably connected to the tie rod 27. The left outer wall of the tie rod 27 is fixedly connected to the fixed column 28. The outer wall of the fixed column 28 is slidably connected to the inner wall of the hollow column 26. The outer wall of the fixed column 28 is snapped into the inner wall of the top plate 25. The inner wall of the fixed column 28 is provided with a second spring 29. The right outer wall of the second spring 29 is fixedly connected to the inner wall of the hollow column 26.

[0036] Specifically, by installing the top plate 25 onto the inner wall of the fixing plate 17 and the mounting plate 24, the spring 29 installed on the inner wall of the hollow column 26 pushes the fixing column 28 into the inner wall of the top plate 25, enabling the fixing column 28 to achieve a self-locking effect. By pulling the pull rod 27, the fixing column 28 slides synchronously, compressing the spring 29, allowing the fixing column 28 to quickly reset while providing power for its ejection. By having the top plate 25 press against the upper surface of the box culvert body 16, the box culvert body 16 can be prevented from tilting during the jacking process. By changing the material of the top plate 25, a resistance test can be performed on the upper surface of the box culvert body 16.

[0037] Working principle: When the test bench is needed, test plates 4 made of different materials are installed on the outer wall of push plate 10, and the locking blocks 14 installed on the inner wall of test plates 4 lock push plate 10, which can achieve the effect of quickly fixing test plates 4. By installing the left support plate 18 on the inner wall of fixing plate 17, and installing support plate 18 and electric push rod 20 on the right outer wall of support block 19, the electric push rod 20 is activated to push push block 21 to slide, which in turn drives box culvert body 16 to slide. When box culvert body 16 slides to the appropriate position, the electric push rod 5 is activated to push cross block 6 to slide, which in turn drives rotating rod 7 to rotate, so that test plates 4... After the box culvert body 16 is attached, the cross block 6 will abut against the sleeve 9 and the rotating rod 7 will abut against the push plate 10, so that the push plate 10 and the test plate 4 can be evenly stressed against the box culvert body 16. When the top plate 25 of different materials is installed on the inner wall of the fixing plate 17 and the mounting plate 24, the spring 29 pushes the fixing column 28 to lock the top plate 25, so that the top plate 25 can abut against the upper surface of the box culvert body 16 and achieve the effect of testing the resistance of the box culvert body 16. The push block 21 and the box culvert body 16 are connected to the connecting block 22 by the bolt 23, so that the push block 21 can pull the box culvert body 16 to slide synchronously, so as to facilitate repeated testing.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A test bench for simulating the sidewall resistance of a box culvert jacking, comprising a test bench body (1), characterized in that: Two sets of baffles (2) are fixedly connected to the upper surface of the test bench body (1). Guide posts (3) are slidably connected to the inner wall of each baffle (2). A test plate (4) is fixedly connected to the right outer wall of each guide post (3). An electric push rod (5) is fixedly connected to the outer wall of each baffle (2). A cross block (6) is fixedly installed at the output end of the electric push rod (5). A positioning post (8) is fixedly connected to the right outer wall of the cross block (6). A sleeve (9) is slidably connected to the outer wall of the positioning post (8). A push plate (10) is fixedly connected to the right outer wall of the sleeve (9). The right outer wall of the push plate (10) is in contact with the left outer wall of the test plate (4). A rotating rod (7) is rotatably connected to the outer wall of the cross block (6). A sliding column (11) is fixedly connected to the inner wall of the rotating rod (7). Both ends of the sliding column (11) are slidably connected to the inner wall of the push plate (10). A roller (12) is rotatably connected to the outer wall of the sliding column (11). The outer wall of the roller (12) is slidably connected to the inner wall of the push plate (10).

2. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 1, characterized in that: The inner wall of the guide post (3) is provided with a spring (13), and the outer wall of the spring (13) is fixedly connected with a locking block (14). The outer wall of the locking block (14) is slidably connected to the inner wall of the guide post (3). One side of the outer wall of the locking block (14) is an inclined surface, and the other side of the outer wall of the locking block (14) is engaged with the left outer wall of the push plate (10).

3. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 2, characterized in that: The lower surface of the test plate (4) is slidably connected to the upper surface of the test bench body (1), the lower surface of the push plate (10) is slidably connected to the upper surface of the test bench body (1), a number of positioning blocks (15) are fixedly connected to the upper surface of the test bench body (1), a box culvert body (16) is provided on the upper surface of the test bench body (1), and the outer wall of the box culvert body (16) is slidably connected to the outer wall of the positioning block (15).

4. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 3, characterized in that: A fixing plate (17) is fixedly connected to the upper surface of the test bench body (1), and a left support plate (18) is snapped into the inner wall of the fixing plate (17). A support block (19) is provided on the outer wall of the support plate (18).

5. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 4, characterized in that: Multiple sets of electric push rods (20) are fixedly connected to the outer wall of the support plate (18) on the right side. A push block (21) is fixedly provided at the output end of the electric push rod (20). The right outer wall of the push block (21) is in contact with the left outer wall of the box culvert body (16).

6. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 5, characterized in that: The inner wall of the push block (21) is rotatably connected to a connecting block (22), and the outer wall of the connecting block (22) is rotatably connected to the inner wall of the box culvert body (16). The inner wall of the box culvert body (16) is provided with a bolt (23), and the outer wall of the bolt (23) is threadedly connected to the inner wall of the connecting block (22).

7. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 1, characterized in that: The upper surface of the test bench body (1) is fixedly connected to an installation plate (24). The inner wall of the installation plate (24) is provided with a top plate (25). The outer wall of the top plate (25) away from the installation plate (24) is snapped into the inner wall of a fixed plate (17). The inner walls of the fixed plate (17) and the installation plate (24) are respectively fixedly connected to two sets of hollow columns (26). The inner walls of the hollow columns (26) are slidably connected to a tie rod (27).

8. The test bench for simulating the sidewall resistance of a box culvert jacking according to claim 7, characterized in that: A fixing post (28) is fixedly connected to the left outer wall of the pull rod (27). The outer wall of the fixing post (28) is slidably connected to the inner wall of the hollow column (26). The outer wall of the fixing post (28) is snapped into the inner wall of the top plate (25). A second spring (29) is provided on the inner wall of the fixing post (28). The right outer wall of the second spring (29) is fixedly connected to the inner wall of the hollow column (26).

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