Foundation pit beam string structure node structure

Abstract

The utility model relates to a foundation pit beam string structure node structure which comprises a supporting rod, a steel pull rod and a pin shaft, the two sides of the far end of the supporting rod are fixedly connected with lug plates at a set angle, and the end of the steel pull rod is hinged to the lug plates through the pin shaft. The two sides of the steel plate are fixedly connected with the lug plates, the steel pull rod can be connected with the lug plates of the supporting rod through the pin shafts, and therefore the number of the pin shafts penetrating through the plates can be reduced, and installation is convenient and fast. The rectangular steel pipe is slotted, the stiffening plates and the lug plates are connected with the rectangular steel pipe in an embedded mode, and force transmission of the joint is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of foundation pit string beam node structure, belong to building construction technical field. BACKGROUND

[0002] To ensure the safety of underground structure construction and the surrounding environment of foundation pit, support, reinforcement and protection measures are needed for the side wall and surrounding environment of foundation pit. Whether it is a high-rise building or a deep foundation pit engineering of subway construction, since most of them are excavated in the city, there are usually traffic arteries, existing buildings or pipelines and various structures around the foundation pit. In order to ensure the safety of the surrounding environment of foundation pit, save time, save cost and protect the environment, string beam steel support system is widely used.

[0003] In the prior art, the string beam support rod head is connected with the two steel pull rods through a pin shaft, which needs to pass through multiple plates, making installation difficult and subject to error, which may not be installed, for example:

[0004] Prior art citation: Chinese patent document with publication number CN212956557U and name "string beam connecting node structure of foundation pit support system" published on April 13, 2021. SUMMARY

[0005] The utility model aims to provide a kind of foundation pit string beam node structure, fixed connecting lug plate is arranged on the both sides of strut, both sides steel pull rod is connected through lug plate, so that the number of pin shafts passing through plate is reduced, and installation is convenient and fast.

[0006] The present application adopts the following technical solutions:

[0007] A kind of foundation pit string beam node structure, including strut 2, steel pull rod 1, pin shaft 3, the two sides of the distal end of the strut 2 are fixedly connected with lug plate 202 at a set angle, the end of the steel pull rod 1 is hinged with the lug plate 202 using the pin shaft 3.

[0008] Preferably, the end of the steel pull rod 1 is provided with a double lug plate structure, the lug plate 202 is inserted into the double lug plate structure and hinged using the pin shaft 3.

[0009] Preferably, the main body of the strut 2 is a rectangular steel tube 204, a stiffener 201 is fixedly arranged at the middle part of the strut 2, the stiffener 201 penetrates the strut 2 and is perpendicular to the plane where the lug plate 202 is located.

[0010] Preferably, a reinforcing plate 203 is attached and fixed to the two sides of the lug plate 202.

[0011] Further, the rectangular steel tube 204 is slotted, the connecting lug plate 202 passes through the slot of the rectangular steel tube 204 and is welded as a whole with the rectangular steel tube 204.

[0012] Further, according to different design angles of the steel pull rod 1 and the support rod 2, multiple support rods 2 with the connecting lug plates 202 are configured as standard parts.

[0013] Preferably, the proximal end of the support rod 2 is connected with the prestress loading device.

[0014] Further, the stiffening plate 201 is arranged on the central axis of the rectangular steel pipe 204 and protrudes from the two ends of the rectangular steel pipe 204.

[0015] The beneficial effects of the utility model lie in:

[0016] 1) The steel plate is fixedly connected with the lug plate on both sides, the steel pull rod can be connected with the lug plate of the support rod through the pin shaft, so that the number of pin shafts penetrating the plate can be reduced, and installation is convenient and fast.

[0017] 2) The rectangular steel pipe is slotted, the stiffening plate and the lug plate are connected with the rectangular steel pipe in an embedded manner, and the force transmission of the node is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the plan view of the foundation pit beam string structure in the utility model.

[0019] Figure 2 is the schematic view of the foundation pit beam string node structure in the utility model. Figure 1 the node is enlarged.

[0020] Figure 3 is Figure 2 1-1 sectional view in (a).

[0021] Figure 4 is the schematic view of the support rod joint, wherein (a) is a plan view, (b) is a front view, and (c) is a plan view.

[0022] In the figure, 1. Steel pull rod, 2. Support rod (prestress can be applied), 3. Pin shaft, 201. Stiffening plate, 202. Lug plate, 203. Reinforcing plate, 204. Rectangular steel pipe. DETAILED DESCRIPTION

[0023] The utility model is further described below in combination with the drawings and specific embodiments.

[0024] The embodiment provides a foundation pit beam string joint structure, which comprises a steel pull rod 1, a support rod 2 and a pin shaft 3, the steel pull rod 1 is connected with the lug plate of the support rod 2 through the pin shaft 3, the head (distal end) of the support rod is composed of a stiffener plate 201, a lug plate 202 and a reinforcing plate 203, the lug plate 202 is a full-length plate, the stiffener plate 201 is connected with the lug plate 202 on both sides, and the stiffener plate 201 and the lug plate 202 are connected with a rectangular steel pipe in an embedded mode, so that the force transmission of the joint is ensured, and the reinforcing plate welded on the lug plate pin shaft hole ensures the force transmission requirement of the pin shaft.

[0025] Specifically referring to Figures 1-4 , a foundation pit beam string joint structure comprises a support rod 2, a steel pull rod 1 and a pin shaft 3, both sides of the distal end of the support rod 2 are fixedly connected with lug plates 202 at a set angle, and the end of the steel pull rod 1 is hingedly connected with the lug plate 202 through the pin shaft 3.

[0026] The main difference between the scheme and the prior art is that fixed connection lug plates are arranged on both sides of the support rod, and the two steel pull rods are connected through the lug plates, so that the number of pin shafts penetrating the plates is reduced, and installation is convenient and fast.

[0027] In this embodiment, referring to Figure 3 , the end of the steel pull rod 1 is provided with a double-lug plate structure, the lug plate 202 is inserted into the double-lug plate structure and is hingedly connected through the pin shaft 3.

[0028] In this embodiment, referring to Figure 4 , the main body of the support rod 2 is a rectangular steel pipe 204, a stiffener plate 201 is fixedly arranged in the middle of the support rod 2, and the stiffener plate 201 penetrates through the support rod 2 and is perpendicular to the plane where the lug plate 202 is located.

[0029] Continuously referring to Figure 4 , the two sides of the lug plate 202 are both attached and fixed with reinforcing plates 203.

[0030] In this embodiment, referring to Figure 4 (a), the rectangular steel pipe 204 is slotted, the connection lug plate 202 penetrates through the slot of the rectangular steel pipe 204 and is welded with the rectangular steel pipe 204 as a whole.

[0031] In this embodiment, in combination with Figure 1 , it can be understood that according to different design angles of the steel pull rod 1 and the support rod 2, a plurality of support rods 2 provided with connection lug plates 202 are configured as standard parts.

[0032] In this embodiment, referring to Figure 1 , the proximal end of the support rod 2 is connected with a prestress loading device for applying prestress to a concrete surrounding purlin.

[0033] In this embodiment, referring to Figure 4(a), the stiffened plate 201 is arranged on the central axis of the rectangular steel pipe 204, and protrudes from the rectangular steel pipe 204 at both ends.

[0034] It should be noted that the distal end of the support rod in the embodiment refers to the end close to the steel pull rod, and the proximal end refers to the end close to the concrete surrounding purlin.

[0035] The utility model discloses steel plate both sides fixed connection lug plate, and steel pull rod can be connected with the lug plate of support rod through the pin shaft, thereby can reduce the number of pin shafts and is convenient and quick to install, and the rectangular steel pipe is slotted, and the stiffened plate is connected with the lug plate through the embedding mode with the rectangular steel pipe, guarantees the power transmission of node.

[0036] The above is the preferred embodiment of the utility model, and various transformations or improvements can be made by the person skilled in the art on the basis of the above, and these transformations or improvements should belong to the range required to be protected by the utility model on the premise of not departing from the general concept of the utility model.

Claims

1. A tensioned beam joint structure for a foundation pit, comprising a strut (2), a steel tie rod (1), and a pin (3), characterized in that: The two ends of the support rod (2) are fixedly connected to the ear plate (202) at a set angle, and the end of the steel tie rod (1) is hinged to the ear plate (202) by the pin (3).

2. The foundation beam string structure of claim 1, wherein: The steel tie rod (1) is provided with a double ear plate structure at its end. The ear plate (202) is inserted into the double ear plate structure and is hinged by the pin (3).

3. The foundation beam string structure of claim 1, wherein: The main body of the support rod (2) is a rectangular steel pipe (204). A stiffening plate (201) is fixedly provided in the middle of the support rod (2). The stiffening plate (201) passes through the support rod (2) and is perpendicular to the plane where the ear plate (202) is located.

4. The tensioned beam joint structure for foundation pits as described in claim 1, characterized in that: Reinforcing plates (203) are attached and fixed to both sides of the ear plate (202).

5. The tensioned beam joint structure for foundation pits as described in claim 3, characterized in that: The rectangular steel pipe (204) is slit, and the connecting ear plate (202) passes through the slit of the rectangular steel pipe (204) and is welded to the rectangular steel pipe (204) as a whole.

6. The tensioned beam joint structure for foundation pits as described in claim 5, characterized in that: Based on the different design angles of the steel tie rod (1) and the strut (2), multiple struts (2) with connecting lugs (202) are configured as standard parts.

7. The tensioned beam joint structure for foundation pits as described in claim 1, characterized in that: The near end of the strut (2) is connected to the prestressing loading device.

8. The tensioned beam joint structure for foundation pits as described in claim 3, characterized in that: The stiffening plate (201) is disposed on the central axis of the rectangular steel tube (204) and protrudes from the rectangular steel tube (204) at both ends.

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