Anti-bending hinged joint structure of foundation pit steel support

Abstract

The utility model relates to the technical field of foundation pit steel supports, in particular to an anti-bending hinged joint structure of a foundation pit steel support, which comprises a vertical beam and a horizontal beam, an end rod is fixedly mounted at the end of the horizontal beam close to the vertical beam, and a rotating shaft is fixedly mounted at the end of the end rod. A reinforcing hinge piece used for assembling the rotating shaft is fixedly installed on the vertical beam, the reinforcing hinge piece comprises a U-shaped reinforcing seat fixedly installed on the vertical beam, hinge end plates are fixedly installed on the inner side faces of plate bodies on the left side and the right side of the U-shaped reinforcing seat, and the rotating shaft is rotationally connected with the two hinge end plates; an anti-bending supporting assembly used for pulling and supporting the horizontal beam is further fixedly installed between the vertical beam and the horizontal beam, the anti-bending supporting assembly comprises an upper hanging plate and a lower supporting plate, the upper hanging plate is arranged between the top face of the horizontal beam and the vertical beam, and the lower supporting plate is arranged between the bottom face of the horizontal beam and the vertical beam. The utility model has the advantages of firm and stable structure, bending resistance and support.

Description

Bending hinge joint structure of steel support for foundation pit Technical Field

[0001] This utility model relates to the field of foundation pit steel support technology, and more specifically, to a bending-resistant hinged node structure for foundation pit steel support. Background Technology

[0002] During the construction of foundation pit projects, the steel support for the foundation pit is a key structure for maintaining the stability of the foundation pit, and the reliability of its node connections is of paramount importance. In most foundation pit projects, the steel internal support beams are set up vertically according to the actual layout needs, and then a corresponding number of beams are used to form a horizontal support system. At the same time, combined with vertical bending resisting components such as Larssen steel sheet piles, they together form a composite support system for the foundation pit.

[0003] The invention patent with authorization announcement number CN109113072B discloses a device and a method for strengthening the connection of steel supports in foundation pits. It includes an active welding rod and a driven welding rod, both of which have a first hinged end. The active and driven welding rods are hinged to each other, and rotate relative to each other around the hinge point of the first hinged end to form an insertion angle that matches the welding angle, and are inserted at the welding angle position. Both the active and driven welding rods have welding surfaces that contact the support beams and steel waist beams inside the foundation pit. The active and driven welding rods are respectively attached to and welded to the support beams and steel waist beams inside the foundation pit through their welding surfaces. The triangle shape provides stability, exhibiting characteristics of firmness, stability, and pressure resistance, which can further improve the structural stability of the device itself and the connection nodes. The hypotenuse support rod can distribute stress. This improves the shear and tensile strength at the connection nodes, allowing for flexible adaptation to different mechanical requirements.

[0004] While the aforementioned technical solutions have their respective advantages, most hinged joint structures for foundation pit steel supports still have certain defects in use. Traditional foundation pit steel support joint structures mostly adopt welding or bolted connections. Although welded joints can provide high connection strength, the welding process requires extremely high precision. If the welding quality is substandard, stress concentration is likely to occur. Furthermore, in the complex stress environment of the foundation pit, cracks are prone to appear at the welded parts, affecting the stability of the overall structure. Although bolted joints are relatively convenient to install and disassemble, the bolts are prone to loosening under large bending moment loads, leading to a decrease in the bending resistance of the joint and an inability to effectively transfer and distribute the load, making it difficult to meet the requirements of high stability and high reliability of steel support structures in foundation pit engineering.

[0005] With the increasing number of deep foundation pit projects in urban construction, higher challenges are posed to the bending resistance and connection reliability of the steel support node structure for foundation pits, and a new type of bending-resistant hinged node structure is urgently needed to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a bending-resistant hinged joint structure for foundation pit steel support, so as to solve the defects mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] The bending hinge joint structure of the foundation pit steel support includes a vertical beam and a horizontal beam. An end rod is fixedly installed at the end of the horizontal beam near the end of the vertical beam. A rotating shaft is fixedly installed at the end of the end rod. A reinforcing hinge component for assembling the rotating shaft is fixedly installed on the vertical beam. The reinforcing hinge component includes a U-shaped reinforcing seat fixedly installed on the vertical beam. Hinged end plates are fixedly installed on the inner surfaces of the left and right side plates of the U-shaped reinforcing seat. The rotating shaft is rotatably connected to the two hinged end plates. A bending support assembly for pulling and supporting the horizontal beam is also fixedly installed between the vertical beam and the horizontal beam. The bending support assembly includes an upper hanging plate and a lower support plate. The upper hanging plate is located between the top surface of the horizontal beam and the vertical beam, and the lower support plate is located between the bottom surface of the horizontal beam and the vertical beam.

[0009] Preferably, the U-shaped reinforcing seat has a U-shaped cross-section, and the rear end of the hinged end plate is simultaneously fixedly installed on the side of the vertical beam;

[0010] This feature increases the fixed contact area of ​​the hinged end plate, making its structure more robust and stable.

[0011] Preferably, a horizontally arranged bushing is fixedly installed on the outer side of the hinge end plate. Both the bushing and the hinge end plate are provided with shaft holes. The end shaft of the rotating shaft is located in the shaft hole and is rotatably connected to the shaft hole.

[0012] The aforementioned method uses bushings to synchronously support the rotating shaft, increasing the support area and making the support for the rotating shaft more robust and stable.

[0013] Preferably, a limiting plate is fixedly installed on both ends of the shaft, and the limiting plate is located between the two hinged end plates;

[0014] Preferably, the outer diameter of the limiting plate is larger than the diameter of the shaft hole, and a side reinforcing protrusion is also fixedly installed between the bushing, the U-shaped reinforcing seat, and the hinge end plate;

[0015] These two features ensure that the pivot will not come out of the shaft hole, and also ensure that the overall structure of the reinforced hinge is more robust and stable.

[0016] Preferably, a first bolt plate is fixedly installed at the top of the upper hanging plate, and the first bolt plate is fixedly installed on the top rod of the vertical beam; a second bolt plate is hinged to the bottom of the upper hanging plate, and the second bolt plate is fixedly installed on the top surface of the horizontal beam.

[0017] Preferably, a third bolt plate and a fourth bolt plate are fixedly installed at both ends of the lower support plate, the third bolt plate is fixedly installed on the lower half of the vertical beam, and the fourth bolt plate is fixedly installed on the bottom surface of the horizontal beam.

[0018] These two settings enable the upper hanging plate and lower support plate to be properly fixed and installed.

[0019] Preferably, two symmetrical upper hanging rods are fixedly installed between the lower support plate and the first bolt plate, and a movable gap is provided between the two upper hanging rods, with the end rod located at the movable gap.

[0020] The above-mentioned use of upper suspension rods for further tension support ensures that the structure of the bending support assembly is more robust and stable, and enables bending support operation at the hinge joint between the vertical beam and the horizontal beam.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model, by setting a U-shaped reinforcing seat with a hinged end plate and a bushing, combined with the structural design of the rotating shaft and the limiting plate, increases the support area and fixed contact area of ​​the rotating shaft, realizes a stable hinge between the horizontal beam and the vertical beam, effectively prevents the rotating shaft from detaching, and enhances the firmness and stability of the node connection.

[0023] 2. This utility model provides a bending support assembly consisting of an upper hanging plate, a lower support plate, and an upper hanging rod between a vertical beam and a horizontal beam. The upper hanging plate and the lower support plate pull and support the horizontal beam from the top and bottom surfaces, respectively, while the upper hanging rod further strengthens and stabilizes the structure. This achieves effective bending support for the hinged joint, thereby improving the bending resistance of the joint and enhancing the overall structural load-bearing capacity.

[0024] 3. By setting up side reinforcement protrusions, this utility model further enhances the overall structural strength of the reinforced hinge. Combined with the reasonable installation and connection methods between various components, it ensures the stability and reliability of the node under complex stress environment, thus meeting the requirements of high stability and high reliability of steel support structure in foundation pit engineering and reducing construction safety risks. Attached Figure Description

[0025] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 is a partial structural schematic diagram of this utility model;

[0027] Figure 3 is an enlarged view of point A in Figure 2 of this utility model;

[0028] Figure 4 is a structural schematic diagram of the anti-bending support component of this utility model;

[0029] The meanings of the labels in the diagram are as follows:

[0030] 1. Vertical beam; 10. Horizontal beam; 11. End rod; 12. Rotating shaft; 121. Limiting plate;

[0031] 2. Reinforced hinge; 20. U-shaped reinforcing seat; 21. Hinge end plate; 22. Bushing; 23. Shaft hole; 24. Side reinforcing protrusion;

[0032] 3. Bending support assembly; 30. Upper hanging plate; 301. First bolt plate; 302. Second bolt plate; 31. Upper hanging rod; 311. Movement clearance; 32. Lower support plate; 33. Third bolt plate; 34. Fourth bolt plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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] Please refer to Figures 1-4. This utility model provides a technical solution: a bending-resistant hinged node structure for foundation pit steel support, including a vertical beam 1 and a horizontal beam 10. An end rod 11 is fixedly installed at the end of the horizontal beam 10 near the end of the vertical beam 1. A rotating shaft 12 is fixedly installed at the end of the end rod 11. A reinforcing hinge 2 for assembling the rotating shaft 12 is fixedly installed on the vertical beam 1. The reinforcing hinge 2 includes a U-shaped reinforcing seat 20 fixedly installed on the vertical beam 1. Hinged end plates 21 are fixedly installed on the inner sides of the left and right side plates of the U-shaped reinforcing seat 20. The rotating shaft 12 is rotatably connected to the two hinged end plates 21. The cross-section of the U-shaped reinforcing seat 20 is U-shaped. The rear end of the hinged end plate 21 is simultaneously fixedly installed on the side of the vertical beam 1, increasing the fixed contact area of ​​the hinged end plate 21 and making the connection between the hinged end plate 21 and the vertical beam 1 more stable, thereby improving the structural stability of the entire reinforcing hinge 2.

[0035] As shown in Figures 1-3, a horizontally arranged bushing 22 is fixedly installed on the outer side of the hinge end plate 21. Both the bushing 22 and the hinge end plate 21 are provided with shaft holes 23. The end shaft of the rotating shaft 12 is located in the shaft hole 23 and is rotatably connected to the shaft hole 23. The bushing 22 is used to support the rotating shaft 12 synchronously, increasing the support area and making the support of the rotating shaft 12 more firm and stable, making the rotating shaft 12 more stable and less prone to shaking or displacement.

[0036] As shown in Figures 1-3, a limiting plate 121 is fixedly installed on both ends of the shaft 12. The limiting plate 121 is located between the two hinge end plates 21. The outer diameter of the limiting plate 121 is larger than the diameter of the shaft hole 23, which can ensure that the shaft 12 will not detach from the shaft hole 23. A side reinforcing protrusion 24 is also fixedly installed between the bushing 22, the U-shaped reinforcing seat 20, and the hinge end plate 21. The side reinforcing protrusion 24 performs further reinforcement operations, increases the fixed contact area, and ensures that the overall structure of the reinforced hinge 2 is more solid and stable.

[0037] As shown in Figures 1 and 4, a bending support assembly 3 for traction and support of the horizontal beam 10 is fixedly installed between the vertical beam 1 and the horizontal beam 10. The bending support assembly 3 includes an upper hanging plate 30 and a lower support plate 32. The upper hanging plate 30 is located between the top surface of the horizontal beam 10 and the vertical beam 1, and the lower support plate 32 is located between the bottom surface of the horizontal beam 10 and the vertical beam 1. A first bolt plate 301 is fixedly installed at the top of the upper hanging plate 30. The first bolt plate 301 is fixedly installed on the top rod of the vertical beam 1 by multiple fastening bolts. A second bolt plate 302 is hinged to the bottom of the upper hanging plate 30. The two bolt plates 302 are fixedly installed on the top surface of the horizontal beam 10 by multiple fastening bolts. The two ends of the lower support plate 32 are respectively fixedly installed with a third bolt plate 33 and a fourth bolt plate 34. The third bolt plate 33 is fixedly installed on the lower half of the vertical beam 1 by multiple fastening bolts, and the fourth bolt plate 34 is fixedly installed on the bottom surface of the horizontal beam 10 by multiple fastening bolts. The installation and fixing method of the upper suspension plate 30 and the lower support plate 32 with the vertical beam 1 and the horizontal beam 10 is clarified, so that the bending support component 3 can be stably installed and play a role in pulling and supporting the horizontal beam 10.

[0038] In this embodiment, two symmetrical upper suspension rods 31 are fixedly installed between the lower support plate 32 and the first bolt plate 301. A movable gap 311 is provided between the two upper suspension rods 31. The end rod 11 is located at the movable gap 311. The upper suspension rods 31 are used for further traction support to ensure that the structure of the bending support assembly 3 is more solid and stable, and to realize the bending support operation at the hinge node between the vertical beam 1 and the horizontal beam 10.

[0039] When using the bending hinged joint structure of the foundation pit steel support of this utility model, the horizontal beam 10 is rotated to a suitable angle. After the angle of the horizontal beam 10 is determined, the first bolt plate 301 is fixed to the top of the vertical beam 1. The upper hanging plate 30 is hinged to the top surface of the horizontal beam 10 through the second bolt plate 302. The third bolt plate 33 is fixed to the lower half of the vertical beam 1. The lower support plate 32 is hinged to the bottom surface of the horizontal beam 10 through the fourth bolt plate 34. The installation operation is completed. At this time, the upper hanging plate 30, the lower support plate 32 and the upper hanging rod 31 provide compressive support to the horizontal beam 10.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bending hinged joint structure for steel support of foundation pit, comprising a vertical beam (1) and a horizontal beam (10), characterized in that: An end rod (11) is fixedly installed at the end of the horizontal beam (10) near the vertical beam (1). A rotating shaft (12) is fixedly installed at the end of the end rod (11). A reinforcing hinge (2) for assembling the rotating shaft (12) is fixedly installed on the vertical beam (1). The reinforcing hinge (2) includes a U-shaped reinforcing seat (20) fixedly installed on the vertical beam (1). Hinged end plates (21) are fixedly installed on the inner surfaces of the left and right side plates of the U-shaped reinforcing seat (20). The rotating shaft (12) 2) Rotatably connected to the two hinged end plates (21), and a bending support assembly (3) for pulling and supporting the horizontal beam (10) is also fixedly installed between the vertical beam (1) and the horizontal beam (10). The bending support assembly (3) includes an upper hanging plate (30) and a lower support plate (32). The upper hanging plate (30) is disposed between the top surface of the horizontal beam (10) and the vertical beam (1), and the lower support plate (32) is disposed between the bottom surface of the horizontal beam (10) and the vertical beam (1).

2. The bending hinged joint structure for foundation pit steel support according to claim 1, characterized in that: The U-shaped reinforcing seat (20) has a U-shaped cross section, and the rear end of the hinged end plate (21) is simultaneously fixedly installed on the side of the vertical beam (1).

3. The bending hinged joint structure for foundation pit steel support according to claim 2, characterized in that: A horizontally arranged bushing (22) is fixedly installed on the outer side of the hinge end plate (21). Both the bushing (22) and the hinge end plate (21) are provided with shaft holes (23). The end shaft of the rotating shaft (12) is located in the shaft hole (23) and is rotatably connected to the shaft hole (23).

4. The bending hinged joint structure for foundation pit steel support according to claim 3, characterized in that: Limiting discs (121) are fixedly installed on both ends of the shaft (12), and the limiting discs (121) are located between the two hinged end plates (21).

5. The bending hinged joint structure for foundation pit steel support according to claim 4, characterized in that: The outer diameter of the limiting plate (121) is larger than the diameter of the shaft hole (23), and a side reinforcing protrusion (24) is fixedly installed between the bushing (22), the U-shaped reinforcing seat (20), and the hinge end plate (21).

6. The bending resistant connection of a steel support of an excavation pit according to claim 1, characterized in that: The top of the upper hanging plate (30) is fixedly installed with a first bolt plate (301), which is fixedly installed on the top rod of the vertical beam (1). The bottom of the upper hanging plate (30) is hinged with a second bolt plate (302), which is fixedly installed on the top surface of the horizontal beam (10).

7. The anti-buckling hinge joint structure of a steel support of a foundation pit according to claim 6, characterized in that: The lower support plate (32) is fixedly installed with a third bolt plate (33) and a fourth bolt plate (34) is hinged to both ends. The third bolt plate (33) is fixedly installed on the lower half of the vertical beam (1), and the fourth bolt plate (34) is fixedly installed on the bottom surface of the horizontal beam (10).

8. The anti-buckling hinge joint structure of a steel support of a foundation pit according to claim 7, characterized in that: Two symmetrical upper hanging rods (31) are fixedly installed between the lower support plate (32) and the first bolt plate (301). A movable gap (311) is provided between the two upper hanging rods (31), and the end rod (11) is located in the movable gap (311).

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