Foundation pit supporting structure of upside-down hanging well wall

Abstract

The utility model provides a foundation pit supporting structure of an upside-down hanging well wall, which comprises a plurality of grating frames arranged in a foundation pit, reinforcing meshes are arranged on one sides of the grating frames, the reinforcing meshes are fixedly connected with the grating frames, a plurality of supporting rods are arranged in the foundation pit, the supporting rods correspond to the grating frames, inserting blocks are fixed on the upper sides of the grating frames, and the inserting blocks are fixedly connected with the grating frames. Inserting grooves are formed in the bottom of the grating frame and correspond to the inserting blocks, and the space between the grating frame and the foundation pit is filled with a reinforcing layer. The reinforcing layer is filled between the grating frames and the foundation pit, the upper grating frame and the lower grating frame can be guaranteed not to be staggered, the supporting strength is guaranteed, the reinforcing layer can play a certain supporting role and improve the supporting strength, the inserting blocks and the inserting grooves are arranged on the upper sides and the lower sides of the grating frames respectively, and the connecting strength of the two grating frames can be enhanced. The supporting rods are arranged in the foundation pit, a triangular structure can be formed, and therefore the supporting stability is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a foundation pit support structure with an inverted well wall. Background Art

[0002] The inverted shaft wall method is a type of excavation method for vertical shaft foundation pits, which is like digging a well downwards, with support provided while excavating. Since the inverted shaft wall method is usually suitable for areas with narrow sites and occupies less space, it is not suitable for conventional support methods such as slope support. For example, the patent with publication number CN210658380U discloses an inverted shaft wall groove slope support structure, including a foundation pit, in which an I-beam, an anti-slip plate, a top beam shock-absorbing plate, a marking tape, a locking beam ring, a steel mesh, a steel pipe anchor, a grating steel frame, and connecting bars are arranged; the bottom of the foundation pit is filled with a bottom layer, and a top layer is arranged above the bottom layer; the top of the foundation pit is provided with a locking beam ring, and an I-beam is provided above the locking beam ring, and a plurality of anti-overturning steel pipes are arranged in the I-beam; a top beam shock-absorbing plate is provided above the I-beam; and a plurality of grating steel frames, steel pipe anchors, connecting bars, and a steel mesh are provided on the inner wall of the foundation pit. The device supports the foundation pit through grid steel frames, steel pipe anchors, connecting bars and steel mesh. However, since the support is carried out while excavation is carried out, the grid steel frames are installed downward, and gaps may occur between the grid steel frames and the pit wall, which may easily lead to misalignment between the upper and lower grid steel frames, resulting in poor support effect at the joints.

[0003] To this end, the utility model provides a foundation pit supporting structure with an inverted well wall. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a foundation pit support structure with an inverted well wall to solve the problems raised in the above-mentioned background technology. The utility model can ensure that the upper and lower grid frames will not be misaligned, thereby ensuring the support strength, and the reinforcement layer can also play a certain supporting role and improve the support strength; it can also strengthen the strength of the connection between the two grid frames; and a triangular structure can be formed to ensure the stability of the support.

[0005] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a foundation pit support structure of an inverted well wall, including a plurality of grating frames installed in the foundation pit, a steel mesh is installed on one side of the grating frame, the steel mesh is fixedly connected to the grating frame, a plurality of support rods are installed in the foundation pit, the support rods correspond to the grating frame, an insert block is fixed on the upper side of the grating frame, a slot is opened at the bottom of the grating frame, the slot corresponds to the insert block, and a reinforcement layer is filled between the grating frame and the foundation pit.

[0006] Furthermore, the reinforcement layer is composed of prefabricated concrete panels.

[0007] Furthermore, a plurality of first anchors are installed in the grid frame, the first anchors pass through the reinforcement layer and are fixedly connected to the pit wall of the foundation pit, and a plurality of first through grooves are opened in the grid frame, the first through grooves corresponding to the first anchors.

[0008] Furthermore, a plurality of horseshoe clips and a plurality of second anchors are installed between the grid frame and the steel mesh, and the second anchors pass through the horseshoe clips and the grid frame to be fixedly connected to the pit wall of the foundation pit.

[0009] Furthermore, four adjacent support rods are connected end to end to form a support frame, the support frame is a quadrilateral structure, the support frame and the grid frame are a triangular structure, and the support rods correspond to the second anchor nails.

[0010] Furthermore, a top block is fixed at the corner of the support frame, and the top block is fixedly connected to the grid frame through a second anchor nail.

[0011] Furthermore, a second through slot is provided in the top block, and the second anchor pin corresponds to the second through slot.

[0012] Furthermore, the grid frame is made of steel material, and the grid frame is a U-shaped structure, and the U-shaped structure corresponds to the foundation pit.

[0013] Beneficial effects of the utility model: The utility model is a foundation pit support structure of an inverted well wall, comprising a grid frame; a foundation pit; a reinforcement layer; an insert block; a slot; and a support rod.

[0014] Filling a reinforcement layer between the grid frame and the foundation pit can ensure that the upper and lower grid frames will not be misaligned, ensuring the support strength. The reinforcement layer can also play a certain supporting role and improve the support strength. Plug blocks and slots are respectively set on the upper and lower sides of the grid frame to strengthen the strength of the connection between the two grid frames. Support rods are set in the foundation pit to form a triangular structure, thereby ensuring the stability of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall assembly cross-sectional structure of a foundation pit support structure with an inverted well wall according to the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram at A in the middle;

[0017] Figure 3 It is an exploded diagram of a foundation pit support structure with an inverted well wall according to the utility model;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of a horseshoe clamp and a second anchor in a foundation pit support structure for an inverted well wall of the utility model;

[0019] Figure 5It is a schematic diagram of the assembled three-dimensional structure of a support frame in a foundation pit support structure for an inverted well wall according to the utility model;

[0020] In the figure: 1. foundation pit; 2. grid frame; 3. steel mesh; 4. horseshoe clamp; 5. first anchor nail; 6. second anchor nail; 7. slot; 8. insert block; 9. first through slot; 10. support rod; 11. top block; 12. second through slot; 13. reinforcement layer. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figures 1 to 5 The utility model provides a technical solution: a foundation pit support structure of an inverted well wall, comprising a plurality of grid frames 2 installed in a foundation pit 1, a steel mesh 3 is installed on one side of the grid frame 2, the steel mesh 3 is fixedly connected to the grid frame 2, a plurality of support rods 10 are installed in the foundation pit 1, the support rods 10 correspond to the grid frame 2, an insert block 8 is fixed on the upper side of the grid frame 2, a slot 7 is opened at the bottom of the grid frame 2, the slot 7 corresponds to the insert block 8, and a reinforcement layer 13 is filled between the grid frame 2 and the foundation pit 1.

[0023] In this embodiment, the reinforcement layer 13 is composed of prefabricated concrete panels.

[0024] Specifically, the space between the grid frame 2 and the foundation pit 1 is filled by the reinforcement layer 13 to ensure that the upper and lower grid frames 2 are not misaligned, thereby ensuring the support effect, and the precast concrete has a high strength and can assist in the support.

[0025] A plurality of first anchors 5 are installed in the grid frame 2, and the first anchors 5 pass through the reinforcement layer 13 and are fixedly connected to the pit wall of the foundation pit 1. A plurality of first through grooves 9 are opened in the grid frame 2, and the first through grooves 9 correspond to the first anchors 5. A plurality of horseshoe clips 4 and a plurality of second anchors 6 are installed between the grid frame 2 and the steel mesh 3, and the second anchors 6 pass through the horseshoe clips 4 and the grid frame 2 and are fixedly connected to the pit wall of the foundation pit 1.

[0026] Specifically, when supporting, the grid frame 2 is nailed to the pit wall of the foundation pit 1 through the first anchor 5, and then the steel mesh 3 is placed on one side of the grid frame 2, and the steel mesh 3 is clamped on the grid frame 2 through the horseshoe clamp 4, and then the horseshoe clamp 4 is fixed by the second anchor 6, so as to fix the steel mesh 3.

[0027] Four adjacent support rods 10 are connected end to end to form a support frame. The support frame is a quadrilateral structure. There is a triangular structure between the support frame and the grid frame 2. The support rods 10 correspond to the second anchor 6. A top block 11 is fixed at the corner of the support frame. The top block 11 is fixedly connected to the grid frame 2 through the second anchor 6. A second through groove 12 is opened in the top block 11. The second anchor 6 corresponds to the second through groove 12. The grid frame 2 is made of steel material. The grid frame 2 is a U-shaped structure, and the U-shaped structure corresponds to the foundation pit 1.

[0028] Specifically, when supporting, the grid frame 2 is fixed to the pit wall of the foundation pit 1, and then the support frame is placed in the grid frame 2 so that the top block 11 contacts the grid frame 2, and the second anchor 6 is inserted into the second through groove 12 so that the second anchor 6 is fixedly connected to the grid frame 2. The grid frame 2 can be fixedly connected to the top block 11 by the second anchor 6, so that the support frame is used to support the grid frame 2, thereby improving the supporting strength of the grid frame 2.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A foundation pit support structure for an inverted well wall, comprising a plurality of grid frames (2) installed in a foundation pit (1), characterized in that: A steel mesh (3) is installed on one side of the grid frame (2), and the steel mesh (3) is fixedly connected to the grid frame (2). A plurality of support rods (10) are installed in the foundation pit (1), and the support rods (10) correspond to the grid frame (2). An insert block (8) is fixed on the upper side of the grid frame (2). A slot (7) is provided at the bottom of the grid frame (2), and the slot (7) corresponds to the insert block (8). A reinforcement layer (13) is filled between the grid frame (2) and the foundation pit (1).

2. The foundation pit support structure of the inverted well wall according to claim 1 is characterized in that: The reinforcement layer (13) is composed of pre-placed concrete slabs.

3. The foundation pit support structure of the inverted well wall according to claim 2 is characterized in that: A plurality of first anchors (5) are installed in the grid frame (2), the first anchors (5) pass through the reinforcement layer (13) and are fixedly connected to the pit wall of the foundation pit (1), and a plurality of first through slots (9) are opened in the grid frame (2), the first through slots (9) corresponding to the first anchors (5).

4. The foundation pit support structure of the inverted well wall according to claim 1 is characterized in that: A plurality of horseshoe clamps (4) and a plurality of second anchors (6) are installed between the grid frame (2) and the steel mesh (3); the second anchors (6) pass through the horseshoe clamps (4) and the grid frame (2) and are fixedly connected to the pit wall of the foundation pit (1).

5. The foundation pit support structure of the inverted well wall according to claim 4 is characterized in that: Four adjacent support rods (10) are connected end to end to form a support frame, the support frame is a quadrilateral structure, the support frame and the grid frame (2) are a triangular structure, and the support rods (10) correspond to the second anchor nails (6).

6. The foundation pit support structure of the inverted well wall according to claim 5 is characterized in that: A top block (11) is fixed at a corner of the support frame, and the top block (11) is fixedly connected to the grid frame (2) via a second anchor nail (6).

7. The foundation pit support structure of the inverted well wall according to claim 6 is characterized by: A second through slot (12) is provided in the top block (11), and the second anchor nail (6) corresponds to the second through slot (12).

8. The foundation pit support structure with an inverted well wall according to claim 1, characterized in that: The grid frame (2) is made of steel material and is a circular structure, which corresponds to the foundation pit (1).

Images