Foundation pit inclined throwing support and basement outer wall joint structure

Abstract

The utility model discloses a foundation pit inclined throwing support and basement outer wall node structure which comprises an inclined throwing support obliquely arranged on a foundation slab and a foundation pit support structure, the inclined throwing support comprises a steel pipe section and a profile steel section connected with the steel pipe section, the cross section area of the profile steel section is smaller than that of the steel pipe section, the steel pipe section is arranged on the foundation slab, and the steel pipe section is arranged on the foundation slab. The profile steel section penetrates through the basement outer wall to be arranged on the foundation pit support structure, and a water stop steel plate is arranged in the profile steel section located on the basement outer wall. According to the utility model, the basement exterior wall can be constructed at the joint where the inclined throwing support penetrates through the basement exterior wall, so that the structural performance and the waterproof performance of the basement exterior wall are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a node structure of a foundation pit oblique brace and a basement outer wall. Background Art

[0002] In construction environments with poor geological conditions, SMW pile retaining structures are usually used for underground foundation pits. At this time, a Φ609 steel pipe diagonal brace is set at the edge of the pit, that is, the lower end of the steel pipe diagonal brace is set on the foundation bottom plate, and the upper end of the steel pipe diagonal brace is set on the capping ring beam of the foundation pit retaining structure. This construction method saves a horizontal support, which not only saves costs, but also shortens the construction period, and the construction technology is mature. Many construction projects are located in the city center, and the surrounding areas involve municipal roads, underground municipal pipelines, etc. The surrounding environment is complex and the environmental protection level requirements are higher. If the diagonal brace is removed too early, it will be unfavorable to the control of foundation pit deformation. Excessive deformation will affect the surrounding roads and municipal pipelines, resulting in adverse effects such as settlement, displacement and even fracture. Therefore, it is considered to remove the diagonal brace after the basement structure is backbuilt and the exterior wall is constructed to reduce the impact of foundation pit deformation on the surrounding environment. However, at the construction nodes of the diagonal brace and the exterior wall, due to the large cross-sectional area of ​​the steel pipe used as the diagonal brace, the horizontal and vertical reinforcements of the exterior wall are difficult to be bent or threaded significantly during construction. In addition, because the steel pipes are buried in the exterior wall at the exterior wall nodes where they cross, the structural strength and waterproof performance here deteriorate. Utility Model Content

[0003] The utility model aims to provide a node structure of a foundation pit inclined brace and a basement outer wall, so as to solve the problem of how to construct the basement outer wall to ensure its structural strength and prevent performance when the inclined brace is removed after the basement structure is rebuilt and the outer wall is constructed.

[0004] In order to solve the above technical problems, the technical solution provided by the utility model is: a node structure of a foundation pit inclined brace and a basement outer wall, comprising an inclined brace obliquely arranged on a foundation slab and a foundation pit retaining structure, the inclined brace comprising a steel pipe section and a steel section connected thereto, the cross-sectional area of ​​the steel section being smaller than the cross-sectional area of ​​the steel pipe section, the steel pipe section being arranged on the foundation slab, the steel section passing through the basement outer wall and being arranged on the foundation pit retaining structure, and a waterstop steel plate being arranged in the steel section located on the basement outer wall.

[0005] Furthermore, in the node structure of the foundation pit oblique brace and the basement outer wall provided by the utility model, the steel pipe section and the steel section are connected by a cushion.

[0006] Furthermore, the utility model provides a node structure between the foundation pit diagonal brace and the basement outer wall, wherein the cushion is a steel plate, a steel section or a steel frame.

[0007] Furthermore, in the node structure between the foundation pit oblique brace and the basement outer wall provided by the utility model, the steel pipe section is a Φ609 steel pipe.

[0008] Furthermore, in the node structure of the foundation pit oblique brace and the basement outer wall provided by the utility model, the steel section is an H-shaped steel, an I-shaped steel, or a combination of two channel steels formed back to back.

[0009] Furthermore, the utility model provides a node structure between the foundation pit oblique brace and the basement outer wall, wherein the steel section is arranged on the top ring beam of the foundation pit retaining structure through embedded parts.

[0010] Furthermore, the utility model provides a node structure between a foundation pit oblique brace and a basement outer wall, wherein the embedded part includes an anchor plate and a plurality of anchor bars evenly distributed vertically thereon.

[0011] Furthermore, in the node structure of the foundation pit oblique brace and the basement outer wall provided by the utility model, stiffening plates or reinforcing ribs are arranged between the two sides of the steel section and the embedded parts.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model provides a node structure of a foundation pit diagonal brace and a basement outer wall. At a node where the diagonal brace passes through the basement outer wall, a traditional steel pipe diagonal brace is improved into a steel pipe section and a steel section connected thereto, and the cross-sectional area of ​​the steel section is smaller than the cross-sectional area of ​​the steel section, so that the cross-sectional area of ​​the diagonal brace at the node of the basement outer wall becomes smaller, and the transverse and longitudinal steel bars of the basement outer wall can be slightly bent on the steel section, so that at the node where the diagonal brace section passes through the basement outer wall, the bent transverse and longitudinal steel pipes, the steel section and the poured concrete can ensure the construction strength and quality of the basement outer wall, ensure the structural performance of the basement outer wall, and ensure the waterproof performance of the basement outer wall at the node by the water-stop steel pipe arranged on the steel section, thereby avoiding leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the plane structure of the node structure of the foundation pit inclined support and the basement outer wall;

[0015] Figure 2 It is a structural schematic diagram of the steel section and the water-stop steel pipe thereon;

[0016] Figure 3 It is the main structural diagram of the embedded parts;

[0017] Figure 4 It is a left view structural diagram of the embedded parts;

[0018] As shown in the figure:

[0019] 1. Steel pipe section, 2. Gasket, 3. Steel section, 4. Waterstop steel plate, 5. Basement exterior wall, 6. Embedded parts, 61. Anchor plate, 62. Anchor reinforcement, 7. Stiffening plate, 8. Top ring beam. DETAILED DESCRIPTION

[0020] The utility model is described in detail below in conjunction with the accompanying drawings: According to the following description, the advantages and features of the utility model will be more clearly understood. It should be noted that the accompanying drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the utility model.

[0021] Please refer to Figures 1 to 4 The utility model provides a node structure of a foundation pit diagonal brace and a basement outer wall, including a diagonal brace obliquely arranged on a foundation bottom plate (not shown) and a foundation pit enclosure structure, the diagonal brace includes a steel pipe section 1 and a steel section 3 connected thereto, the cross-sectional area of ​​the steel section 3 is smaller than the cross-sectional area of ​​the steel pipe section 1, the steel pipe section 1 is arranged on the foundation bottom plate, the steel section 3 passes through the basement outer wall 5 and is arranged on the foundation pit enclosure structure, and a water stop steel plate 4 is arranged on the steel section 3 located inside the basement outer wall 5. The water stop steel plate can be a 50×5mm ring.

[0022] Please refer to Figure 1 The node structure of the foundation pit diagonal brace and the basement outer wall provided by the embodiment of the utility model, at the node where the diagonal brace passes through the basement outer wall 5, the traditional steel pipe diagonal brace is improved to a steel pipe section 1 and a steel section 3 connected thereto, and the cross-sectional area of ​​the steel section 3 is smaller than the cross-sectional area of ​​the steel pipe section 1, that is, the wall-penetrating section of the traditional steel pipe diagonal brace is improved from a steel pipe to a steel section, so that the cross-sectional area of ​​the diagonal brace at the node of the basement outer wall 5 becomes smaller, and the transverse and longitudinal steel bars of the basement outer wall 5 can be slightly bent on the steel section 3, so that at the node where the diagonal brace section passes through the basement outer wall 5, the construction strength and construction quality of the basement outer wall 5 are guaranteed by the bent transverse and longitudinal steel pipes, the steel section 3 and the poured concrete, and the structural performance of the basement outer wall 5 is guaranteed, and the waterproof performance of the basement outer wall 5 is guaranteed by the water-stop steel pipe arranged on the steel section 3 at the node to avoid leakage.

[0023] The node structure of the foundation pit inclined brace and the basement outer wall provided by the embodiment of the utility model has a hole reserved in the template for the steel section 3 to pass through at the node of the basement outer wall 5 and the steel section 3. After the basement is backbuilt, the outer wall is constructed, and the earthwork is backfilled, the steel section 3 of the inclined brace located on the inner side of the basement outer wall 5 can be cut and removed, and the steel pipe section 1 is completely removed, thereby reducing the impact of the foundation pit deformation on the surrounding environment. The reserved distance L between the inner side of the basement outer wall 5 and the steel section 3 on its side can be 500mm.

[0024] Please refer to Figure 1In order to improve the reliability of the connection between the steel pipe section 1 and the steel section 3, the node structure of the foundation pit diagonal brace and the basement outer wall provided by the embodiment of the utility model, the steel pipe section 1 and the steel section 3 are connected by a cushion 2. That is, the cushion 2 is welded on the steel pipe section 1 and the steel section 3 respectively. The cushion 2 can be a steel plate, a steel section or a steel frame; the steel pipe section 1 is a Φ609×16 steel pipe.

[0025] Please refer to Figure 1 and Figure 2 In order to improve the support strength, the node structure of the foundation pit diagonal brace and the basement outer wall provided by the embodiment of the utility model is that the steel section 1 is an H-shaped steel, an I-shaped steel or a combination of two channel steels back to back. The specification of the H-shaped steel can be H400×400×13×21.

[0026] Please refer to Figure 1 In order to improve the reliability of the support of the steel section 3 on the foundation pit retaining structure, the node structure of the foundation pit inclined brace and the basement outer wall provided by the embodiment of the utility model, the steel section 3 is set on the foundation pit retaining structure through the embedded part 6. Specifically, the steel section 3 can be set on the top ring beam 8 of the foundation pit retaining structure through the embedded part 6. The embedded part 6 includes an anchor plate 61 and a plurality of anchor bars 62 vertically and evenly distributed thereon. The steel section 3 and the embedded part 6 can be welded. In order to improve the reliability of welding at the node, a stiffening plate 7 or a reinforcing rib can be welded between the two sides of the steel section 3 and the embedded part 6.

[0027] The node structure of the foundation pit inclined brace and the basement outer wall provided by the embodiment of the utility model solves the problem that the horizontal and vertical reinforcements and formwork in the wall cannot be constructed at the node of the basement outer wall 5 of the traditional Φ609 steel pipe inclined brace, and solves the waterproofing problem of the outer wall at the node of the basement outer wall 5 of the traditional Φ609 steel pipe inclined brace.

[0028] The node structure of the foundation pit oblique brace and the basement outer wall provided by the embodiment of the utility model has the advantages of simple structure, low cost, convenient construction, good safety, and accelerated construction progress at the node.

[0029] The present utility model is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the described embodiments of the present utility model belong to the scope of protection of the present utility model. Those skilled in the art can make other levels of modifications and changes to the present utility model. In this way, if these modifications and changes of the present utility model fall within the scope of the claims of the present utility model, the present utility model is also intended to include these changes and changes.

Claims

1. A node structure between a foundation pit inclined support and a basement outer wall, characterized in that: It includes an inclined brace obliquely arranged on the foundation slab and the foundation pit retaining structure, the inclined brace includes a steel pipe section and a steel section connected thereto, the cross-sectional area of ​​the steel section is smaller than the cross-sectional area of ​​the steel pipe section, the steel pipe section is arranged on the foundation slab, the steel section passes through the outer wall of the basement and is arranged on the foundation pit retaining structure, and a waterstop steel plate is arranged on the steel section located inside the outer wall of the basement.

2. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 1 is characterized in that: The steel pipe section and the steel section are connected via a gasket.

3. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 2 is characterized in that: The cushion is a steel plate, a steel section or a steel frame.

4. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 1 is characterized in that: The steel pipe section is a Φ609 steel pipe.

5. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 1 is characterized in that: The steel section is an H-shaped steel, an I-shaped steel or a combination of two channel steels back to back.

6. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 1 is characterized in that: The steel section is arranged on the capping ring beam of the foundation pit retaining structure through embedded parts.

7. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 6 is characterized in that: The embedded part comprises an anchor plate and a plurality of anchor bars evenly distributed vertically thereon.

8. The node structure of the foundation pit oblique brace and the basement outer wall according to claim 7 is characterized in that: Stiffening plates or reinforcing ribs are arranged between the two sides of the steel section and the embedded parts.

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