Combined foundation pit support frame suitable for narrow space

Abstract

The utility model relates to the field of geotechnical engineering discloses a combined foundation pit support frame suitable for narrow space, including fixed frame, the right end lateral wall of fixed frame is connected with the connecting plate, the outer wall sliding connection of connecting plate has the cover board, the inner wall of cover board is located the groove, the inner wall of connecting plate sets up the limiting mechanism, the inner wall of fixed frame and cover board respectively detachable installation has the support frame, the inner wall of support frame penetrates and is connected with screw rod threadedly. In the utility model, through the cooperation of pressing block, return spring and positioning groove, the cover board position can be quickly adjusted, the size requirement of narrow space can be flexibly adapted, and the operation is simple, convenient and efficient; the contact tightness of the convex block and the foundation pit support point can be accurately adjusted by rotating the screw rod, the friction force is increased by the convex block, the stress is dispersed, the foundation pit side wall soil body is effectively reinforced, the support stability is improved, and the construction dynamic requirement can be repeatedly adjusted and adapted.

Description

Technical Field

[0001] This utility model relates to the field of geotechnical engineering, and in particular to a combined foundation pit support frame suitable for narrow spaces. Background Technology

[0002] In the field of geotechnical engineering, the foundation pit support frame is a key structure to ensure the safety of foundation pit excavation and control the deformation of the surrounding soil. It is used to support and protect the side walls during the foundation pit excavation process to avoid hazards such as soil collapse and displacement. It is widely used in narrow space foundation pit operation scenarios in construction and municipal engineering, such as urban underground pipe gallery construction and foundation pit projects in areas adjacent to buildings.

[0003] In existing technologies, conventional foundation pit support frames mostly use pre-sized rigid components, which are assembled through welding, bolting, and other methods. When used in confined spaces, support beams, support columns, and other components of corresponding lengths and angles are prefabricated based on site measurement data. After being transported to the site, the components are connected according to the design positions using lifting equipment, wrenches, and other tools to form a support system that blocks lateral soil pressure and maintains foundation pit stability.

[0004] The existing technology has the following drawbacks: customized rigid components are difficult to adapt flexibly to the complex dimensional changes in narrow spaces. If the space dimensions are adjusted, the components need to be re-prefabricated, which leads to extended construction period and increased costs. On the other hand, the assembly and disassembly process relies on a large number of special tools, which are cumbersome to operate. The tools are limited in narrow spaces, resulting in low assembly and disassembly efficiency and poor component reusability, which increases resource waste. At the same time, the adjustment of the support tightness of the foundation pit sidewall soil is not precise enough, making it difficult to respond in a timely manner to the dynamic needs of soil deformation during construction. Insufficient or excessive support force can easily cause safety hazards and resource waste. Therefore, a combined foundation pit support frame suitable for narrow spaces is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a combined foundation pit support frame suitable for narrow spaces, aiming to improve the problem that customized rigid structures in the prior art cannot adapt to the size of the foundation pit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a combined foundation pit support frame suitable for narrow spaces, comprising a fixed frame, a connecting plate fixedly connected to the right side wall of the fixed frame, a sleeve plate slidably connected to the outer wall of the connecting plate, a positioning groove provided on the inner wall of the sleeve plate, a limiting mechanism provided on the inner wall of the connecting plate, a support frame detachably installed on the inner walls of the fixed frame and the sleeve plate respectively, a threaded rod threadedly connected through the inner wall of the support frame, a fitting plate rotatably connected to the left side wall of the threaded rod, a protrusion fixedly connected to the left side wall of the fitting plate, a sleeve fixedly connected to the left side wall of the support frame, and a disassembly assembly provided on the right side wall of the support frame;

[0007] The limiting mechanism includes a pressing block, which is slidably connected to the inner wall of the connecting plate, and the front end of the pressing block is elastically connected to the connecting plate through a return spring.

[0008] As a further description of the above technical solution:

[0009] The assembly / disassembly assembly includes a positioning plate, which is fixedly connected to the right side wall of the support frame. A round tube is fixedly connected to the top of the positioning plate, and a plug is inserted into the inner wall of the positioning plate. A wedge is elastically connected to the right inner wall of the plug through a positioning spring.

[0010] As a further description of the above technical solution:

[0011] The inner wall of the right end of the insert is fixedly connected to one end of the positioning spring, and the other end of the positioning spring is fixedly connected to the right end of the wedge. The wedge passes through and is slidably connected to the inner wall of the insert.

[0012] As a further description of the above technical solution:

[0013] The inserts are fixedly connected to the top of the fixing frame and the sleeve plate, respectively.

[0014] As a further description of the above technical solution:

[0015] The wedge is inserted into the inner wall of the circular tube, and the surface of the positioning plate is in contact with the surface of the wedge.

[0016] As a further description of the above technical solution:

[0017] The front end of the pressing block is fixedly connected to one end of the reset spring, and the other end of the reset spring is fixedly connected to the inner wall of the front end of the connecting plate.

[0018] As a further description of the above technical solution:

[0019] The pressing block is inserted into the inner wall of the positioning groove.

[0020] As a further description of the above technical solution:

[0021] The bonding plate is slidably connected to the inner wall of the sleeve.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the position of the sleeve plate can be quickly adjusted by the cooperation of the pressing block, the reset spring and the positioning groove, which can flexibly adapt to the size requirements of narrow space, and the operation is simple and efficient; rotating the threaded rod can accurately adjust the contact tightness between the protrusion and the foundation pit support point, and use the protrusion to increase the friction and disperse the stress, effectively strengthen the soil of the foundation pit side wall, improve the support stability, and can be repeatedly adjusted to adapt to the dynamic needs of construction.

[0024] 2. In this utility model, by using the elastic locking structure of wedge, positioning spring and round tube, the support frame can be easily disassembled by moving the wedge to the right, which is convenient for disassembly, storage and transportation; during assembly, the support frame can be quickly and accurately inserted and locked with the fixed frame and sleeve plate, which not only ensures the stability of the structural connection, but also realizes the standardization and reuse of parts, reduces construction costs and disassembly difficulty, and is suitable for construction scenarios in narrow spaces. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a combined foundation pit support frame suitable for narrow spaces proposed in this utility model;

[0026] Figure 2 This is a cross-sectional schematic diagram of a combined foundation pit support frame suitable for narrow spaces proposed in this utility model.

[0027] Figure 3 This is an exploded view of the connecting plate and pressing block of a combined foundation pit support frame suitable for narrow spaces proposed in this utility model;

[0028] Figure 4 This is a schematic diagram showing the overall support frame of a combined foundation pit support frame suitable for narrow spaces proposed in this utility model.

[0029] Figure 5 An exploded view of the support frame and fixing frame of a combined foundation pit support frame suitable for narrow spaces proposed in this utility model;

[0030] Figure 6 This is a cross-sectional schematic diagram of the insert block of a combined foundation pit support frame suitable for narrow spaces proposed in this utility model.

[0031] Legend:

[0032] 1. Fixing frame; 2. Connecting plate; 3. Sleeve plate; 4. Positioning groove; 5. Return spring; 6. Pressing block; 7. Support frame; 8. Threaded rod; 9. Adhesive plate; 10. Sleeve; 11. Protrusion; 12. Positioning plate; 13. Round tube; 14. Insert block; 15. Positioning spring; 16. Wedge block. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-3 This utility model provides an embodiment of a combined foundation pit support frame suitable for narrow spaces, including a fixed frame 1. A connecting plate 2 is fixedly connected to the right side wall of the fixed frame 1. The connecting plate 2 mainly supports and connects to the sleeve plate 3. The sleeve plate 3 is slidably connected to the outer wall of the connecting plate 2. The inner wall of the sleeve plate 3 has a positioning groove 4 with a horizontal opening and a vertical opening. The horizontal opening allows the fingers to be pressed without being obstructed, and the vertical opening allows the pressing block 6 to be locked in the inner wall, preventing the entire sleeve plate 3 from moving left or right. The inner wall of the connecting plate 2 is provided with a limit mechanism. Support frames 7 are detachably installed on the inner walls of the fixed frame 1 and the sleeve plate 3, respectively. The upper and lower ends of the support frame 7 are both T-shaped, allowing the support frame 7 to be inserted into or detached from the fixing frame 1 and the sleeve plate 3. The inner wall of the support frame 7 is threaded and threaded with a threaded rod 8. The inner wall of the support frame 7 has threads corresponding to the threaded rod 8, which can allow the threaded rod 8 to move along the inner wall of the support frame 7. The left side wall of the threaded rod 8 is rotatably connected to a fitting plate 9. The left side wall of the fitting plate 9 is fixedly connected to a protrusion 11. The protrusion 11 is inserted into the surface soil layer of the foundation pit, which can increase the friction between the support structure and the soil and resist the slippage tendency of the support frame caused by soil pressure and other factors. The left side wall of the support frame 7 is fixedly connected to a sleeve 10, and the right side wall of the support frame 7 is provided with a disassembly and assembly assembly.

[0035] The limiting mechanism includes a pressing block 6, which is slidably connected to the inner wall of the connecting plate 2. The connecting plate 2 has a slot corresponding to the pressing block 6, which allows the pressing block 6 to move along the slot. The front end of the pressing block 6 is elastically connected to the connecting plate 2 through a return spring 5.

[0036] Reference Figures 4-6The assembly includes a positioning plate 12, which is fixedly connected to the right side wall of the support frame 7. A round tube 13 is fixedly connected to the top of the positioning plate 12, and an opening is provided on the round tube 13 to allow the wedge block 16 to be inserted into the opening. A plug 14 is inserted into the inner wall of the positioning plate 12, and a corresponding slot is provided on the positioning plate 12 to allow the plug 14 to be inserted into the slot. The right inner wall of the plug 14 is elastically connected to the wedge block 16 via a positioning spring 15. The wedge block 16 is inclined, and when the inclined surface is compressed, it will move laterally along the slot. The inner wall of the wedge 16 is fixedly connected to one end of the positioning spring 15. When the wedge 16 moves to the right, it will compress the positioning spring 15. When resetting, the elastic force of the positioning spring 15 will bring the wedge 16 back to its original position. The other end of the positioning spring 15 is fixedly connected to the right end of the wedge 16. The wedge 16 passes through and slides on the inner wall of the insert 14. The insert 14 has a slot, which allows the wedge 16 to move laterally along the slot. The insert 14 is fixedly connected to the top of the fixing frame 1 and the sleeve 3 respectively. The wedge 16 is inserted into the inner wall of the round tube 13. The surface of the positioning plate 12 is in contact with the surface of the wedge 16.

[0037] Reference Figures 1-3 The front end of the pressing block 6 is fixedly connected to one end of the return spring 5. When the pressing block 6 moves forward, it will compress the return spring 5. When resetting, the spring force of the return spring 5 will carry the pressing block 6 to reset. The other end of the return spring 5 is fixedly connected to the inner wall of the front end of the connecting plate 2. The pressing block 6 is inserted into the inner wall of the positioning groove 4. The bonding plate 9 is slidably connected to the inner wall of the sleeve 10. The sleeve 10 can guide the movement of the bonding plate 9 to ensure that its lateral movement does not change its trajectory.

[0038] Working principle: When adjusting the size, simply press the pressing block 6. Since the front end of the pressing block 6 is connected to the return spring 5, the return spring 5 is compressed when pressed, and the pressing block 6 moves forward to disengage from the vertical opening of the positioning groove 4 on the sleeve plate 3. Then, slide the sleeve plate 3 along the outer wall of the connecting plate 2 to adjust it to a suitable position to meet the size requirements of the narrow space. Release the pressing block 6, and the return spring 5 rebounds, causing the pressing block 6 to snap into the vertical opening of the positioning groove 4 on the inner wall of the sleeve plate 3, realizing the limiting connection between the fixing frame 1 and the sleeve plate 3, forming the basic structure of the support frame. When adjusting again, simply follow the above steps. Then, by rotating the threaded rod 8, further adjust the contact tightness between the bonding plate 9 and the foundation pit support point. This allows the threaded rod 8 to move to the left with the bonding plate 9 and the protrusion 11, allowing the protrusion 11 to insert into the foundation pit support point. By increasing friction and dispersing stress, this assists in positioning the support frame and reinforcing the soil on the side wall of the foundation pit.

[0039] When the support frame 7 needs to be disassembled, stored, or installed, move the wedge 16 to the right to compress the positioning spring 15, causing the wedge 16 to detach from the round tube 13. First, move the upper set of fixing frames 1 and sleeve plates 3 upwards to separate the insert block 14 and positioning plate 12. Then, remove the lower set of fixing frames 1 and sleeve plates 3 from the support frame 7. During assembly, simply align the support frame 7 with the T-shaped slots on the inner walls of the fixing frames 1 and sleeve plates 3, insert the support frame 7 into the fixing frames 1 and sleeve plates 3 to complete the initial insertion. Use the bottom end of the positioning plate 12 to press the inclined surface of the wedge 16, allowing the wedge 16 to be inserted into the insert block 14. When the wedge 16 and the opening of the round tube 13 coincide, use the reverse elastic force of the positioning spring 15 to reset the wedge 16, allowing the wedge 16 to be inserted into the opening of the round tube 13.

[0040] 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 combined foundation pit support frame suitable for narrow spaces, comprising a fixing frame (1), characterized in that: A connecting plate (2) is fixedly connected to the right side wall of the fixed frame (1). A sleeve plate (3) is slidably connected to the outer wall of the connecting plate (2). A positioning groove (4) is opened on the inner wall of the sleeve plate (3). A limit mechanism is provided on the inner wall of the connecting plate (2). A support frame (7) is detachably installed on the inner walls of the fixed frame (1) and the sleeve plate (3). A threaded rod (8) is threaded through and threadedly connected to the inner wall of the support frame (7). A fitting plate (9) is rotatably connected to the left side wall of the threaded rod (8). A protrusion (11) is fixedly connected to the left side wall of the fitting plate (9). A sleeve (10) is fixedly connected to the left side wall of the support frame (7). A disassembly assembly is provided on the right side wall of the support frame (7). The limiting mechanism includes a pressing block (6), which is slidably connected to the inner wall of the connecting plate (2). The front end of the pressing block (6) is elastically connected to the connecting plate (2) through a reset spring (5).

2. The combined foundation pit support frame suitable for narrow spaces according to claim 1, characterized in that: The assembly and disassembly assembly includes a positioning plate (12), which is fixedly connected to the right side wall of the support frame (7). A round tube (13) is fixedly connected to the top of the positioning plate (12). A plug (14) is inserted into the inner wall of the positioning plate (12). A wedge (16) is elastically connected to the right inner wall of the plug (14) through a positioning spring (15).

3. A combined foundation pit support frame suitable for narrow spaces according to claim 2, characterized in that: The inner wall of the right end of the insert (14) is fixedly connected to one end of the positioning spring (15), and the other end of the positioning spring (15) is fixedly connected to the right end of the wedge (16). The wedge (16) passes through and is slidably connected to the inner wall of the insert (14).

4. A combined foundation pit support frame suitable for narrow spaces according to claim 2, characterized in that: The insert (14) is fixedly connected to the top of the fixing frame (1) and the sleeve (3).

5. A combined foundation pit support frame suitable for narrow spaces according to claim 2, characterized in that: The wedge (16) is inserted into the inner wall of the round tube (13), and the surface of the positioning plate (12) is in contact with the surface of the wedge (16).

6. A combined foundation pit support frame suitable for narrow spaces according to claim 1, characterized in that: The front end of the pressing block (6) is fixedly connected to one end of the reset spring (5), and the other end of the reset spring (5) is fixedly connected to the inner wall of the front end of the connecting plate (2).

7. A combined foundation pit support frame suitable for narrow spaces according to claim 1, characterized in that: The pressing block (6) is inserted into the inner wall of the positioning groove (4).

8. A combined foundation pit support frame suitable for narrow spaces according to claim 1, characterized in that: The bonding plate (9) is slidably connected to the inner wall of the sleeve (10).

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