Support position adjusting system for foundation pit model test
By designing a support position adjustment system for foundation pit model testing, using guide rail movement and internal push screw fixing technology, the problem of low support position adjustment efficiency in the prior art is solved, and more efficient test operation and higher utilization rate of support structure baffle is achieved.
Patent Information
- Application Number
- CN202420683979.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-04
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-04-04
AI Technical Summary
In the foundation pit model test, it is difficult for the prior art to efficiently adjust the position of the inner support support, resulting in the need to be disassembled and reinstalled every time the support position is adjusted. The steps are cumbersome, the efficiency is low, and the utilization rate of the support structure baffle is low.
A support position adjustment system is designed, including a support structure baffle, waist beam, hollow tube support, transverse sliding device, vertical sliding device, clamp and flange support. The position adjustment of the hollow tube support is achieved through guide rail movement and internal push screw fixation.
This system improves the efficiency of support position adjustment in foundation pit model test, is easy to operate, and has a higher utilization rate of support structure baffle, and is suitable for tests for comparison of multiple sets of support positions.
Smart Images
Figure CN222730622U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a support position adjustment system for foundation pit model test, belonging to the technical field of test devices. Background Art
[0002] Internal support structures are widely used in various underground engineering construction projects due to their strong support force and flexible layout. Under the same soil pressure, the support effect of the internal support structure will vary with the number and position of the support. Through model tests, the stress and deformation of internal supports with different numbers and positions are obtained, and the optimal number and position of support arrangements are obtained by comparison.
[0003] The foundation pit model test is low-cost and highly controllable. It can simulate the stress and deformation of the actual project according to the stress and deformation of the scaled model. At present, in the model test, the internal support bearings at the corresponding positions are pre-erected and installed. When the foundation pit is excavated, the stress of the internal support and the lateral earth pressure of the supporting structure are measured to simulate the deformation and stress of the foundation pit. For tests that require comparison of multiple groups of support positions, the internal support bearings are fixed in one position, so that each time the support position is adjusted, the internal support bearings must be disassembled and re-installed on the new supporting structure baffle. The steps are cumbersome, the efficiency is low, and the utilization rate of the supporting structure baffle is low. Utility Model Content
[0004] The problem to be solved by the utility model is to propose a support position adjustment system for foundation pit model test in view of the deficiencies in the prior art.
[0005] The technical solution of the utility model is: a support position adjustment system for foundation pit model test, including a supporting structure baffle, a waist beam, a hollow tube support, a transverse sliding device, a vertical sliding device, a clamp and a flange support, wherein the supporting structure baffles are two and are symmetrically arranged; vertical sliding devices are fixed at both ends of the two supporting structure baffles, and the waist beam can be moved and fixed between the vertical sliding devices; transverse sliding devices are fixed at the upper and lower ends of the waist beam, and the flange support of the waist beam can be moved and fixed between the horizontal sliding devices.
[0006] The transverse sliding device includes a transverse guide rail, a transverse bearing ball, and a clamp. One end of the transverse bearing ball is embedded in the transverse guide rail and can roll laterally, and the other end is embedded in the sliding grooves at the upper and lower ends of the flange support. The flange support is placed between the upper and lower transverse guide rails and moves through the transverse bearing ball moving in the transverse guide rail. The hollow tube support is nested in the flange support and fixed to the waist beam by a clamp.
[0007] The vertical sliding device includes a vertical guide rail, a vertical bearing ball, and a clamp. One end of the vertical bearing ball is embedded in the vertical guide rail and can roll vertically, and the other end is embedded in the sliding grooves at the left and right ends of the waist beam. The waist beam is placed between the left and right vertical guide rails and moves by the vertical bearing ball moving in the vertical guide rail. The waist beam is fixed to the surface of the support structure baffle by a clamp.
[0008] The clamp is composed of a clamp body, an inner push screw, a bolt, an inner push screw base and a screw moving groove. The clamp body is in an inverted "L" shape. The screw moving groove passes through the upper end of the clamp body and is at a certain distance from the two end edges of the clamp body. The inner push screw can move in the screw moving groove. After the inner push screw base contacts the surface of the waist beam or the flange support, the waist beam or the flange support is fixed in the clamp body by tightening the bolts.
[0009] The inner space of the transverse guide rail is consistent with the transverse movement track of the transverse bearing ball, and the inner space of the vertical guide rail is consistent with the vertical movement track of the vertical bearing ball.
[0010] The flange support is formed by welding a protective tube and a base, a hollow tube support is installed in the protective tube and fixed by an inner push screw.
[0011] A strain gauge is attached to the surface of the hollow tube support, and pressure gauges are attached to both ends of the hollow tube support.
[0012] The beneficial effect of the above-mentioned scheme adopted in the utility model is that the support position adjustment system for foundation pit model test of the utility model can adjust the position of the hollow tube support by moving the inner support support by the guide rail, and fix the position of the support by the inner push screw. For tests requiring comparison of multiple groups of support positions, the system is more efficient than the test with pre-erected supports, is easier to operate, and has a higher utilization rate of the support structure baffle. It has a certain reference role in improving the efficiency of foundation pit model tests requiring adjustment of support positions. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The utility model is further described below in conjunction with the accompanying drawings:
[0014] Figure 1 It is a schematic diagram of the overall structure of the support position adjustment system used for foundation pit model test in an embodiment of the utility model;
[0015] Figure 2 It is a schematic diagram of the disassembly of the lateral sliding device of the support position adjustment system used for foundation pit model test in an embodiment of the utility model;
[0016] Figure 3 It is a schematic diagram of the disassembly of the vertical sliding device of the support position adjustment system used for the foundation pit model test in the embodiment of the utility model;
[0017] Figure 4 It is a schematic diagram of the relative position relationship between the lateral sliding device and the vertical sliding device of the support position adjustment system used for foundation pit model test in an embodiment of the utility model;
[0018] Figure 5 It is a schematic diagram of a support flange support of a support position adjustment system used for foundation pit model test in an embodiment of the utility model;
[0019] Among them, 1. Support structure baffle; 2. Waist beam; 3. Hollow tube support; 4. Strain gauge; 5. Pressure gauge; 6. Horizontal sliding device; 7. Vertical sliding device; 8. Horizontal guide rail; 9. Horizontal bearing ball; 10. Clamp; 11. Clamp body; 12. Inward push screw; 13. Bolt; 14. Inward push screw base; 15. Screw moving groove; 16. Flange support; 17. Vertical guide rail; 18. Vertical bearing ball; 19. Protective pipe; 20. Base. DETAILED DESCRIPTION
[0020] The support position adjustment system for foundation pit model test of this embodiment is as follows: Figure 1 , including a supporting structure baffle 1, a waist beam 2, a hollow tube support 3, a horizontal sliding device 6, a vertical sliding device 7, a clamp 10 and a flange support 16. The supporting structure baffle 1 has two pieces and is symmetrically arranged; vertical sliding devices 7 are fixed at both ends of the two supporting structure baffles, and the waist beam 2 can be moved and fixed between the vertical sliding devices 7. Horizontal sliding devices 6 are fixed at the upper and lower ends of the waist beam, and the flange support 16 of the waist beam 2 can be moved and fixed between the horizontal sliding devices 6. The flange support 16 is welded by a protective tube 19 and a base 20.
[0021] exist Figure 2 In the figure, the transverse sliding device 6 includes a transverse guide rail 8, a transverse bearing ball 9, and a clamp 10. One end of the transverse bearing ball 9 is embedded in the transverse guide rail 8 and can roll laterally, and the other end is embedded in the sliding grooves at the upper and lower ends of the flange support 16. The flange support 16 is placed between the upper and lower transverse guide rails 8 and moves through the transverse bearing ball 9 moving in the transverse guide rail 8. The flange support 16 is connected to the waist beam 2 through an inner push screw 12, and the hollow tube support is nested in the flange support 16 and fixed to the waist beam 2 through the clamp 10. The internal space of the transverse guide rail 8 is consistent with the transverse motion track of the transverse bearing ball 9.
[0022] exist Figure 3In the figure, the vertical sliding device 7 includes a vertical guide rail 17, a vertical bearing ball 18, and a clamp 10. One end of the vertical bearing ball 18 is embedded in the vertical guide rail 17 and can roll vertically, and the other end is embedded in the sliding grooves at the left and right ends of the waist beam 2. The waist beam 2 is placed between the left and right vertical guide rails 17 and moves by the vertical bearing ball 18 moving in the vertical guide rail 17. The waist beam 2 is fixed to the surface of the supporting structure baffle 1 by the clamp 10, and the internal space of the vertical guide rail 17 is consistent with the vertical movement track of the vertical bearing ball 18.
[0023] The lines of the strain gauge 4 and the pressure gauge 5 in the support position adjustment system for the foundation pit model test of this embodiment maintain a certain bend and are attached to the hollow pipe support 3 with a film tape to prevent the lines from cracking during the soil excavation process.
[0024] The application method of the support position adjustment system for foundation pit model test of this embodiment includes the following steps:
[0025] ① Install pressure gauges and strain gauges. Install several pressure gauges 5 at both ends of each hollow tube support 3, and install strain gauges 4 on the hollow tube support 3.
[0026] ② Install the transverse sliding device 6 and the vertical sliding device 7. First, install the transverse sliding device 6 on the surface of the waist beam 2, fix the vertical sliding devices 7 on both ends of the front of the supporting structure baffle 1 or on the inner wall of the model box used for the test, and then put the assembled waist beam between the two vertical sliding devices 7.
[0027] ③ Adjust the position of the hollow tube support 3. The waist beam is moved vertically or fixed by loosening or tightening the two inner push screws 12 at both ends of the waist beam to adjust the vertical position of the hollow tube support; the position of the hollow tube support is moved horizontally or fixed by loosening or tightening the four inner push screws 12 on the four corners of the flange support base 20.
[0028] The support position adjustment system for foundation pit model tests in this embodiment provides detailed preparations and steps for model tests. For tests that require comparison of multiple groups of support positions, it is more efficient and easier to operate than tests that pre-erect supports. It has a certain reference role in improving the efficiency of foundation pit model tests that require adjustment of support positions.
[0029] The present invention is not limited to the above-mentioned embodiments. Any technical solution formed by equivalent replacement falls within the protection scope required by the present invention.
Claims
1. A support position adjustment system for foundation pit model test, characterized in that: The invention comprises a supporting structure baffle (1), a waist beam (2), a hollow tube support (3), a transverse sliding device (6), a vertical sliding device (7), a clamp (10) and a flange support (16); the supporting structure baffle (1) has two pieces and is symmetrically arranged; the two ends of the two supporting structure baffles are fixed with vertical sliding devices (7); the waist beam (2) can be moved between the vertical sliding devices (7); the upper and lower ends of the waist beam are fixed with transverse sliding devices (6); the flange support (16) can be moved between the transverse sliding devices (6) and fixed.
2. The support position adjustment system for foundation pit model test according to claim 1, characterized in that: The transverse sliding device (6) comprises a transverse guide rail (8), a transverse bearing ball (9), and a clamp (10). One end of the transverse bearing ball (9) is embedded in the transverse guide rail (8) and can roll laterally, and the other end is embedded in the sliding grooves at the upper and lower ends of the flange support (16). The flange support (16) is placed between the upper and lower transverse guide rails (8) and moves through the transverse bearing ball (9) moving in the transverse guide rail (8). The flange support (16) is connected to the waist beam (2) through an inner push screw (12), and the hollow tube support is nested in the flange support (16) and fixed to the waist beam (2) through the clamp (10).
3. The support position adjustment system for foundation pit model test according to claim 1, characterized in that: The vertical sliding device (7) comprises a vertical guide rail (17), a vertical bearing ball (18), and a clamp (10); one end of the vertical bearing ball (18) is embedded in the vertical guide rail (17) and can roll vertically, and the other end is embedded in the sliding grooves at the left and right ends of the waist beam (2); the waist beam (2) is placed between the left and right vertical guide rails (17) and moves by the vertical bearing ball (18) moving in the vertical guide rail (17); the waist beam (2) is fixed to the surface of the supporting structure baffle (1) by the clamp (10).
4. The support position adjustment system for foundation pit model test according to claim 1, characterized in that: The clamp (10) is composed of a clamp body (11), an inner push screw (12), a bolt (13), an inner push screw base (14) and a screw moving groove (15); the clamp body (11) is in an inverted "L" shape; the screw moving groove (15) passes through the upper end of the clamp body (11) and is at a certain distance from the two end edges of the clamp body (11); the inner push screw (12) can move in the screw moving groove (15); after the inner push screw base (14) contacts the surface of the waist beam (2) or the flange support (16), the waist beam (2) or the flange support (16) is fixed in the clamp body (11) by tightening the bolt (13).
5. The support position adjustment system for foundation pit model test according to claim 2, characterized in that: The inner space of the transverse guide rail (8) is consistent with the transverse movement track of the transverse bearing ball (9).
6. The support position adjustment system for foundation pit model test according to claim 3, characterized in that: The internal space of the vertical guide rail (17) is consistent with the vertical movement track of the vertical bearing ball (18).
7. The support position adjustment system for foundation pit model test according to claim 1, characterized in that: The flange support (16) is welded from a protective tube (19) and a base (20), and a hollow tube support (3) is installed in the protective tube and fixed by an inner push screw (12).
8. The support position adjustment system for foundation pit model test according to claim 1, characterized in that: Pressure gauges (5) are installed at both ends of the hollow tube support (3), and a strain gauge (4) is installed on the surface of the hollow tube support (3).