Foundation pit steel support inclined strut end fixing device

Abstract

The utility model belongs to the technical field of foundation pit construction, and provides a foundation pit steel support inclined strut end fixing device which comprises a back plate, a cap and a steel support arm, the back plate is vertically arranged on the inner side of a steel enclosing purlin, the back plate is supported through the steel enclosing purlin, a pedestal is arranged in the middle of the face, opposite to the steel enclosing purlin, of the back plate, and the front side of the pedestal is concaved inwards to form a ball groove; the cap is arranged in the middle of the front side of the back plate, a movable cavity is formed between the cap and the back plate, the cap is formed by butt joint of two arc covers which are distributed up and down or left and right, notches are formed in the middles of the arc covers, the notches in the two arc covers form via holes, and the edges of the arc covers extend in the radial direction to form cover eaves; the steel support arm comprises a hinge ball, an end arm and a main arm. When facing a non-rectangular foundation pit, the steel support can be stably installed, the integrity and reliability of a supporting system of the steel support are ensured, meanwhile, the steel support is also very suitable for inclined struts with different inclination angles, and the using effect is extremely good.

Description

Technical Field

[0001] This utility model belongs to the field of foundation pit construction technology, specifically relating to a foundation pit steel support diagonal brace end fixing device. Background Technology

[0002] In foundation pit engineering, the connection method between steel supports and capping beams is crucial to the safety and stability of the project construction. Traditional connection methods usually employ rigid connections.

[0003] Currently, existing foundation pit engineering planar structures include not only rectangular foundation pits but also non-rectangular foundation pits, such as trapezoidal, triangular, and circular planar foundation pits. The traditional rigid connection method of steel support diagonal bracing and capping beam has significant limitations in dealing with the needs of foundation pits with such complex shapes. That is, because the retaining structures on both sides of the foundation pit are not parallel to each other, the steel support and the capping beam (steel waler) or sidewall are not perpendicular to each other and there is a certain angle. This cannot guarantee the integrity and reliability of the steel support support system, and thus cannot ensure the stability of the pre-applied axial force of the steel support and the safety of the foundation pit construction process.

[0004] Therefore, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Utility Model Content

[0005] The purpose of this invention is to overcome the limitations of the traditional rigid connection between steel support diagonal brace and cap beam, which cannot flexibly cope with foundation pits of different shapes, and to provide a foundation pit steel support diagonal brace end fixing device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A fixing device for the end of a steel support diagonal brace in a foundation pit includes: a back plate, a cap, and a steel support arm. The back plate is erected on the inner side of a steel waler and is supported by the steel waler. A pad is centrally located on the opposite side of the back plate from the steel waler, and the front side of the pad is concave to form a ball groove. The cap is centrally located on the front side of the back plate, and a movable cavity is formed between the cap and the back plate. The cap is formed by joining two arc-shaped caps that are distributed vertically or horizontally. A notch is provided in the middle of the arc-shaped cap, and the notches on the two arc-shaped caps form a through hole. The edge of the arc-shaped cap extends radially to form a cap rim. The steel support arm includes: a hinge ball, an end arm, and a main arm. The hinge ball is rotatably located in the movable cavity, and the rear part of the hinge ball is located in the ball groove. The front part of the hinge ball is clamped in the through hole. The rear end of the end arm is joined to the front part of the hinge ball and is centrally located. The front end of the end arm is joined to the main arm.

[0008] In the aforementioned foundation pit steel support diagonal brace end fixing device, preferably, the top and bottom of the back plate both have wing plates extending horizontally toward the steel waler, so that the wing plates are fixed to the steel waler by bolts.

[0009] Preferably, the upper wing plate is in close contact with the top of the steel waler, and the lower wing plate is in close contact with the bottom of the steel waler.

[0010] Preferably, the outer side of the arc-shaped cover has multiple arc-shaped reinforcing ribs distributed along the circumferential direction;

[0011] One end of the reinforcing rib extends toward the through hole, and the other end extends toward the edge of the arc cover.

[0012] Preferably, the diameter of the through hole is smaller than the diameter of the hinge ball.

[0013] Preferably, the cover is close to the front side of the back plate so as to fix the cover to the back plate by bolts.

[0014] Preferably, one of the arc-shaped covers has a protruding limiting post on its mating surface, and the other arc-shaped cover has a limiting hole corresponding to the limiting post on its mating surface.

[0015] Preferably, both the end arm and the main arm are provided with flanges at their connecting ends.

[0016] Preferably, a rib is connected between the flange and the outer surface of the corresponding end arm or main arm.

[0017] Preferably, multiple ribs are distributed along the circumferential direction, and the multiple ribs are connected in series by anti-fall rings;

[0018] A short section of the fall arresting ring between two adjacent ribs is connected to the pit retaining wall by a fall arresting cable.

[0019] Beneficial effects: This utility model can ensure the stable installation of steel supports even when facing non-rectangular foundation pits, ensuring the integrity and reliability of the steel support system. At the same time, this utility model is also very suitable for diagonal bracing with different inclination angles, and the effect is excellent. Attached Figure Description

[0020] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0021] Figure 1 This is a front view schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall design of this utility model;

[0023] Figure 3 This is a bottom view of the present invention;

[0024] Figure 4 This is a schematic diagram of the overall structure of the back plate of this utility model;

[0025] Figure 5 This is a schematic diagram of the overall structure of the arc-shaped cover of this utility model.

[0026] In the diagram: 1. Back plate; 2. Pad; 3. Ball groove; 4. Arch cover; 5. Notch; 6. Cover eaves; 7. Hinge ball; 8. End arm; 9. Main arm; 10. Wing plate; 11. Reinforcing rib; 12. Limiting post; 13. Flange; 14. Rib plate; 15. Fall arresting ring; 16. Fall arresting cable. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below. 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 are within the protection scope of this utility model.

[0028] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected" and "linked" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0030] This embodiment aims to provide a fixing device for the end of the diagonal brace of the foundation pit steel support. Its main function is to ensure that the steel support can be stably supported in foundation pits of different shapes, and it is applicable to both horizontal and diagonal braces, with excellent performance.

[0031] Reference Figure 1 , Figure 2 and Figure 4The back plate 1 includes a back plate 1, a cap and a steel support arm. The back plate 1 is erected on the inner side of the steel waler. The top and bottom of the back plate 1 are horizontally extended with wing plates 10 towards the steel waler and the wing plates 10 are fixed to the steel waler with bolts so that the steel waler supports the back plate 1. The upper wing plate 10 is close to the top of the steel waler and the lower wing plate 10 is close to the bottom of the steel waler. The back plate 1 has a pad 2 in the center of the front of the opposite side of the steel waler, that is, the front side of the pad 2 is concave to form a ball groove 3.

[0032] Reference Figure 2 , Figure 3 and Figure 5 The cap is centrally located on the front side of the back plate 1, and a movable cavity is formed between the cap and the back plate 1. The cap is assembled by joining two arc caps 4 that are distributed vertically or horizontally. The middle part of the arc cap 4 is provided with a notch 5 so that the notches 5 on the two arc caps 4 form a circular through hole. A cover 6 extends radially along the edge of the arc cap 4. The cover 6 is close to the front side of the back plate 1 so as to fix the cover 6 to the back plate 1 by bolts. Multiple arc-shaped reinforcing ribs 11 are distributed along the circumferential direction on the outer side of the arc cap 4. One end of the reinforcing rib 11 extends into the through hole, and the other end extends into the edge of the arc cap 4, and the entire reinforcing rib 11 is welded to the arc cap 4.

[0033] Reference Figure 2 and Figure 3 The steel support arm includes a hinge ball 7, an end arm 8, and a main arm 9. The hinge ball 7 is rotatably located in the movable cavity, with its rear part located in the ball groove 3 and its front part clamped in the through hole, but this does not hinder the rotation of the hinge ball 7. The rear end of the end arm 8 is connected to the front part of the hinge ball 7 and is centered, while the front end of the end arm 8 is connected to the main arm 9. Specifically, the connection ends of the end arm 8 and the main arm 9 are provided with flanges 13. Triangular ribs 14 are welded between the flanges 13 and the outer surface of the corresponding end arm 8 or main arm 9. Multiple ribs 14 are distributed along the circumference on the end arm 8 or main arm 9, and multiple ribs 14 are connected together by anti-fall rings 15. A small section of anti-fall ring 15 between two adjacent ribs 14 is connected to the pit retaining wall by an anti-fall cable 16. The design of the anti-fall ring 15 ensures that the rotation of the steel support in any direction does not hinder the connection of the anti-fall cable 16, effectively improving the flexibility of the device.

[0034] In this embodiment, the diameter of the through hole must be smaller than the diameter of the hinge ball 7 to prevent the hinge ball 7 from falling out of the movable cavity.

[0035] In this implementation, refer to Figure 1 , Figure 2 and Figure 5One of the arc covers 4 has a protruding limiting post 12 on its mating surface, and the other arc cover 4 has a limiting hole corresponding to the limiting post 12 on its mating surface. The limiting hole is not shown in the figure. When the two arc covers 4 are assembled together, the limiting post 12 is inserted into the limiting hole to enhance the stability of the connection between the two arc covers 4.

[0036] In actual use, first install the back plate 1, then hoist the end arm 8 to a suitable position, and place the rear part of the hinge head into the ball groove 3 on the front side of the pad 2. Install the cap, and then fix the two arc caps 4 together vertically or horizontally and then fix them to the back plate 1. At this point, the end arm 8 is fixed. Hoist the main arm 9 into the pit and align the main arm 9 with the end arm 8. Finally, swing the main arm 9 to adjust the angle. After confirming the angle, install the fall arresting steel cable 16 between the fall arresting ring 15 and the pit wall.

[0037] This embodiment can ensure the stable installation of steel supports even when facing non-rectangular foundation pits, ensuring the integrity and reliability of the steel support system. It is also very suitable for diagonal bracing with different inclination angles, and the effect is excellent.

[0038] It is understood that the above description is merely exemplary and the embodiments of this application do not limit the scope of the application.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be within the scope of protection of the pending claims of the present utility model.

Claims

1. A device for fixing the end of a diagonal brace of a foundation pit steel support, characterized in that, include: The back plate is erected on the inner side of the steel waler and is supported by the steel waler. A pad is provided in the center on the opposite side of the back plate to the steel waler, and the front side of the pad is concave to form a ball groove. The cap is centrally located on the front side of the back plate, and a movable cavity is formed between the cap and the back plate. The cap is formed by joining two arc-shaped caps that are distributed vertically or horizontally. The middle part of the arc-shaped cap has a notch, and the notches on the two arc-shaped caps form a through hole. The edge of the arc-shaped cap extends radially with a cap rim. A steel support arm includes: a hinge ball, an end arm, and a main arm. The hinge ball is rotatably disposed in the movable cavity, the rear part of the hinge ball is located in the ball groove, the front part of the hinge ball is clamped in the through hole, the rear end of the end arm is connected to the front part of the hinge ball and centered, and the front end of the end arm is connected to the main arm.

2. The foundation pit steel support diagonal brace end fixing device according to claim 1, characterized in that, The back plate has wing plates extending horizontally towards the steel waler at both the top and bottom, so that the wing plates can be fixed to the steel waler by bolts.

3. The foundation pit steel support diagonal brace end fixing device according to claim 2, characterized in that, The upper wing plate is in close contact with the top of the steel waler, and the lower wing plate is in close contact with the bottom of the steel waler.

4. The foundation pit steel support diagonal brace end fixing device according to claim 1, characterized in that, The outer side of the arc-shaped cover has multiple arc-shaped reinforcing ribs distributed along the circumferential direction; One end of the reinforcing rib extends toward the through hole, and the other end extends toward the edge of the arc cover.

5. The foundation pit steel support diagonal brace end fixing device according to claim 1, characterized in that, The diameter of the through hole is smaller than the diameter of the hinge ball.

6. The foundation pit steel support diagonal brace end fixing device according to claim 1, characterized in that, The cover bezel is attached to the front side of the back plate to secure the cover bezel to the back plate with bolts.

7. The foundation pit steel support diagonal brace end fixing device according to claim 1, characterized in that, One of the arc-shaped covers has a protruding limiting post on its mating surface, and the other arc-shaped cover has a limiting hole corresponding to the limiting post on its mating surface.

8. The foundation pit steel support diagonal brace end fixing device according to claim 1, characterized in that, Both the end arm and the main arm are provided with flanges at their connecting ends.

9. The foundation pit steel support diagonal brace end fixing device according to claim 8, characterized in that, A rib is connected between the flange and the outer surface of the corresponding end arm or main arm.

10. The foundation pit steel support diagonal brace end fixing device according to claim 9, characterized in that, The ribs are distributed in multiple ways along the circumference, and the multiple ribs are connected together in series by anti-fall rings; A short section of the fall arresting ring between two adjacent ribs is connected to the pit retaining wall by a fall arresting cable.

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