Underground foundation pit reinforcing support

Abstract

The utility model relates to the technical field of reinforcing support structures, in particular to an underground foundation pit reinforcing support, a steel pipe part penetrates through a reinforcing mesh to be inserted into the side wall of a foundation pit, the reinforcing mesh is fixed on the surface of the side wall of the foundation pit, the steel pipe part comprises a steel pipe end part, a steel pipe middle part and a steel pipe tail part, and the steel pipe middle part and the steel pipe tail part are located in the side wall of the foundation pit. The end part of the steel pipe comprises a grabbing rod mechanism, and the grabbing rod mechanism presses the reinforcing mesh and is inserted into a soil body on the side wall of the foundation pit; the grabbing rods push the longitudinal reinforcing steel bars and the transverse reinforcing steel bars below the grabbing rods to move to the side wall of the foundation pit, the conical nails are pricked into the soil body, the reinforcing mesh is fixed to the surface of the side wall of the foundation pit, cement mortar is poured into the center hole, and the cement mortar overflows from the connecting holes, flows along the longitudinal grooves and fills the gap between the steel pipe body and the soil body of the foundation pit. Cement mortar flows into the front end of the steel pipe neck along the longitudinal groove and then flows into the rear end of the steel pipe neck through the mortar penetrating holes, and the connection force between the tail of the steel pipe and the foundation pit soil is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of reinforcement support structures, in particular to an underground foundation pit reinforcement support. Background Art

[0002] Foundation pit reinforcement and support is a very important part of construction projects, especially when constructing deep foundation pits. The purpose of foundation pit reinforcement and support is to ensure the stability of the foundation pit, prevent slope collapse, ensure construction safety, and reduce the impact on the surrounding environment. Soil nail wall is the most common form of foundation pit reinforcement and support. Soil nail wall is a support structure formed by driving steel bars or steel pipes into the slope of the foundation pit as anchors, laying steel mesh on the surface and spraying concrete.

[0003] Traditional soil nail walls mostly use smooth steel pipes and steel mesh for overlap. Under the influence of external forces such as uneven foundation settlement, it is easy for the steel pipes and steel mesh to be misaligned and detached from the soil, reducing the support capacity of the soil nail wall. Utility Model Content

[0004] The main purpose of the utility model is to provide an underground foundation pit reinforcement support to solve the problem proposed in the related art that the steel pipe and the steel mesh are easily misaligned and separated from the soil.

[0005] In order to achieve the above-mentioned object, according to one aspect of the utility model, an underground foundation pit reinforcement support is provided, comprising: a steel mesh, the steel mesh is laid on the surface of the side wall of the foundation pit to connect the steel pipe parts;

[0006] A steel pipe portion, wherein there are several steel pipe portions, wherein the steel pipe portion passes through a steel mesh and is inserted into a side wall of a foundation pit to fix the steel mesh on the surface of the side wall of the foundation pit, wherein the steel pipe portion comprises a steel pipe end portion, a steel pipe middle portion and a steel pipe tail portion, wherein the steel pipe middle portion and the steel pipe tail portion are located inside the side wall of the foundation pit, wherein the steel pipe end portion comprises a grab bar mechanism, wherein the grab bar mechanism presses the steel mesh and is inserted into the soil of the side wall of the foundation pit to fix the steel mesh to the side wall of the foundation pit, wherein the steel pipe middle portion comprises a pouring mechanism, wherein when cement mortar is injected into the pouring mechanism, the cement mortar flows into the gap between the steel pipe portion and the foundation pit through the pouring mechanism.

[0007] Furthermore, the steel mesh includes a plurality of longitudinal steel bars, a plurality of transverse steel bars and a plurality of meshes, and the longitudinal steel bars are fixedly connected to the transverse steel bars in a cross shape.

[0008] Furthermore, a mesh is formed at the intersection of the longitudinal steel bars and the transverse steel bars, and the steel pipe portion passes through the mesh.

[0009] Furthermore, the steel pipe end also includes a steel pipe cap, and the grabbing rod mechanism includes a plurality of grabbing rods and a plurality of conical nails, the grabbing rods are all fixedly arranged on the outer side of the inner surface of the steel pipe cap along the circumferential direction, and the conical nails are all fixedly arranged on the outer side of the inner surface of the grabbing rods.

[0010] Furthermore, the middle portion of the steel pipe also includes a steel pipe body, and the steel pipe body is fixedly arranged in the middle portion of the inner surface of the steel pipe cap.

[0011] Furthermore, the pouring mechanism includes a center hole, a plurality of longitudinal grooves and a plurality of connecting holes, and the center hole is radially arranged inside the steel pipe body and penetrates the steel pipe cap.

[0012] Furthermore, the longitudinal grooves are all radially arranged on the outer surface of the steel pipe body, and a plurality of connecting holes are arranged in the longitudinal grooves, and the connecting holes are connected with the central hole.

[0013] Furthermore, the tail of the steel pipe includes a steel pipe head and a steel pipe neck, the steel pipe head is conical, and the steel pipe head is fixedly connected to the steel pipe body through the steel pipe neck.

[0014] Furthermore, the steel pipe neck includes a steel pipe neck, a reinforcement plate and a plurality of grouting holes, one end of the steel pipe neck is fixedly connected to the steel pipe body, and the other end is fixedly connected to the steel pipe head.

[0015] Furthermore, the reinforcement plate is fixedly arranged on the outer ring of the steel pipe neck, and the grouting holes are all penetrated through the reinforcement plate.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the grab bar pushes the longitudinal steel bars and the transverse steel bars thereunder to move toward the side wall of the foundation pit, the conical nails penetrate into the soil, fix the steel mesh on the surface of the side wall of the foundation pit, and pour cement mortar into the center hole. The cement mortar overflows from the connecting hole, flows along the longitudinal groove, fills the gap between the steel pipe body and the foundation pit soil, and strengthens the connection force between the steel pipe body and the foundation pit soil. The cement mortar flows into the front end of the steel pipe neck along the longitudinal groove, and then flows into the rear end of the steel pipe neck through the grouting hole, and strengthens the connection force between the tail of the steel pipe and the foundation pit soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the steel mesh of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the steel pipe part of the utility model;

[0020] Figure 4 It is a cross-sectional view of the steel pipe portion of the utility model.

[0021] Illustration Description:

[0022] 1. Steel mesh; 11. Longitudinal steel bars; 12. Transverse steel bars; 13. Mesh;

[0023] 2. Steel pipe part; 21. Steel pipe end; 22. Middle part of steel pipe; 23. Tail part of steel pipe; 211. Steel pipe cap; 212. Grab bar; 213. Conical nail; 221. Steel pipe body; 222. Center hole; 223. Longitudinal groove; 224. Connecting hole; 231. Steel pipe head; 232. Steel pipe neck; 233. Reinforcement plate; 234. Grouting hole. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0025] See also Figures 1 to 4 , This embodiment provides an underground foundation pit reinforcement support, including: a steel mesh 1, the steel mesh 1 is laid on the surface of the side wall of the foundation pit, and connects the steel pipe part 2;

[0026] The steel pipe part 2 includes several steel pipe parts 2, which pass through the steel mesh 1 and are inserted into the side wall of the foundation pit to fix the steel mesh 1 on the surface of the side wall of the foundation pit. The steel pipe part 2 includes a steel pipe end part 21, a steel pipe middle part 22 and a steel pipe tail part 23. The steel pipe middle part 22 and the steel pipe tail part 23 are located in the side wall of the foundation pit. The steel pipe end part 21 includes a grab rod mechanism, which presses the steel mesh 1 and is inserted into the soil of the side wall of the foundation pit to fix the steel mesh 1 to the side wall of the foundation pit. The steel pipe middle part 22 includes a pouring mechanism. When cement mortar is injected into the pouring mechanism, the cement mortar flows into the gap between the steel pipe part 2 and the foundation pit through the pouring mechanism.

[0027] The steel mesh 1 includes a plurality of longitudinal steel bars 11 , a plurality of transverse steel bars 12 and a plurality of meshes 13 . The longitudinal steel bars 11 are fixedly connected to the transverse steel bars 12 in a cross shape. The meshes 13 are formed at the intersections of the longitudinal steel bars 11 and the transverse steel bars 12 , and the steel pipe portion 2 passes through the meshes 13 .

[0028] The steel pipe end 21 also includes a steel pipe cap 211, and the grab rod mechanism includes a plurality of grab rods 212 and a plurality of conical nails 213. In this embodiment, four grab rods 212 are preferably used to press down two longitudinal steel bars 11 and two transverse steel bars 12. The grab rods 212 are all circumferentially fixed on the outside of the inner surface of the steel pipe cap 211, and the conical nails 213 are all fixed on the outside of the inner surface of the grab rods 212. When the conical nails 213 are inserted into the soil, the grab rods 212 press the longitudinal steel bars 11 and the transverse steel bars 12 against the side walls of the foundation pit, thereby increasing the connection strength between the steel mesh 1 and the foundation pit and providing support capacity for the support structure.

[0029] The steel pipe middle portion 22 further includes a steel pipe body 221 , which is fixedly disposed at the middle portion of the inner surface of the steel pipe cap 211 .

[0030] The pouring mechanism includes a center hole 222, a plurality of longitudinal grooves 223 and a plurality of connecting holes 224. The center hole 222 is radially arranged inside the steel pipe body 221 and penetrates the steel pipe cap 211. The longitudinal grooves 223 are radially arranged on the outer surface of the steel pipe body 221. A plurality of connecting holes 224 are arranged in the longitudinal grooves 223. The connecting holes 224 are connected with the center hole 222. Cement mortar is poured into the center hole 222. The cement mortar overflows from the connecting holes 224 and flows along the longitudinal grooves 223 to fill the gap between the steel pipe body 221 and the foundation pit soil, thereby strengthening the connection force between the steel pipe body 221 and the foundation pit soil.

[0031] The steel pipe tail 23 includes a steel pipe head 231 and a steel pipe neck. The steel pipe head 231 is conical, which is convenient for the steel pipe part 2 to be inserted into the soil of the side wall of the foundation pit. The steel pipe head 231 is fixedly connected to the steel pipe body 221 through the steel pipe neck.

[0032] The steel pipe neck includes a steel pipe neck 232 , a reinforcement plate 233 and a plurality of grouting holes 234 . One end of the steel pipe neck 232 is fixedly connected to the steel pipe body 221 , and the other end is fixedly connected to the steel pipe head 231 .

[0033] The reinforcing plate 233 is fixed to the outer ring of the steel pipe neck 232 , and the grouting holes 234 are all penetrated through the reinforcing plate 233 . The reinforcing plate 233 increases the connection area between the cement mortar and the steel pipe part 2 , and the cement mortar passes through the grouting holes 234 to fill the gap outside the steel pipe neck 232 .

[0034] A number of holes are punched on the side wall of the foundation pit, the steel mesh 1 is laid on the side wall of the foundation pit, and the steel pipe part 2 is inserted into the hole through the mesh 13, so that the middle part 22 of the steel pipe and the tail part 23 of the steel pipe are located in the hole, and the end part 21 of the steel pipe remains outside the steel mesh 1, and hits the end part 21 of the steel pipe inwardly, and the grab bar 212 pushes the longitudinal steel bars 11 and the transverse steel bars 12 thereunder to move toward the side wall of the foundation pit, and the conical nails 213 are driven into the soil to fix the steel mesh 1 on the surface of the side wall of the foundation pit, and cement mortar is poured into the center hole 222, and the cement mortar overflows from the connecting hole 224, and the longitudinal steel bars 11 and the transverse steel bars 12 are pushed inwardly. The cement mortar flows through the groove 223 to fill the gap between the steel pipe body 221 and the foundation pit soil, thereby strengthening the connection between the steel pipe body 221 and the foundation pit soil. The cement mortar flows into the front end of the steel pipe neck 232 along the longitudinal groove 223, and then flows into the rear end of the steel pipe neck 232 through the grouting hole 234 to strengthen the connection between the steel pipe tail 23 and the foundation pit soil. In the same way, the steel pipe part 2 is inserted into all the holes and cement mortar is poured. Finally, concrete is sprayed onto the steel mesh 1 with the steel pipe part 2 inserted. After the concrete solidifies, a support structure is formed to reinforce the foundation pit.

[0035] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A kind of underground foundation pit reinforcement support, It is characterized in that include: A steel mesh (1), the steel mesh (1) being laid on the surface of the side wall of the foundation pit to connect the steel pipe parts (2); A steel pipe section (2), wherein the steel pipe section (2) is provided in a plurality of pieces. The steel pipe section (2) passes through a steel mesh (1) and is inserted into a side wall of a foundation pit to fix the steel mesh (1) on the surface of the side wall of the foundation pit. The steel pipe section (2) comprises a steel pipe end section (21), a steel pipe middle section (22) and a steel pipe tail section (23). The steel pipe middle section (22) and the steel pipe tail section (23) are located inside the side wall of the foundation pit. The steel pipe end section (21) comprises a gripping rod mechanism. The gripping rod mechanism presses the steel mesh (1) and is inserted into the soil of the side wall of the foundation pit to fix the steel mesh (1) to the side wall of the foundation pit. The steel pipe middle section (22) comprises a pouring mechanism. When cement mortar is injected into the pouring mechanism, the cement mortar flows into the gap between the steel pipe section (2) and the foundation pit through the pouring mechanism.

2. The underground foundation pit reinforcement support according to claim 1, It is characterized in that The steel mesh (1) comprises a plurality of longitudinal steel bars (11), a plurality of transverse steel bars (12) and a plurality of meshes (13); the longitudinal steel bars (11) are fixedly connected to the transverse steel bars (12) in a cross shape.

3. The underground foundation pit reinforcement support according to claim 2, It is characterized in that A mesh (13) is formed at the intersection of the longitudinal steel bars (11) and the transverse steel bars (12), and the steel pipe portion (2) passes through the mesh (13).

4. The underground foundation pit reinforcement support according to claim 3, It is characterized in that The steel pipe end (21) further comprises a steel pipe cap (211), the grabbing rod mechanism comprises a plurality of grabbing rods (212) and a plurality of conical nails (213), the grabbing rods (212) are all fixedly arranged on the outer side of the inner surface of the steel pipe cap (211) along the circumferential direction, and the conical nails (213) are all fixedly arranged on the outer side of the inner surface of the grabbing rods (212).

5. The underground foundation pit reinforcement support according to claim 4, It is characterized in that The steel pipe middle portion (22) further comprises a steel pipe body (221), and the steel pipe body (221) is fixedly arranged at the middle portion of the inner surface of the steel pipe cap (211).

6. The underground foundation pit reinforcement support according to claim 5, It is characterized in that The injection mechanism comprises a central hole (222), a plurality of longitudinal grooves (223) and a plurality of connecting holes (224); the central hole (222) is radially arranged inside the steel pipe body (221) and penetrates the steel pipe cap (211).

7. The underground foundation pit reinforcement support according to claim 6, It is characterized in that The longitudinal grooves (223) are radially arranged on the outer surface of the steel tube body (221), and a plurality of connecting holes (224) are arranged in the longitudinal grooves (223), wherein the connecting holes (224) are connected to the central hole (222).

8. The underground foundation pit reinforcement support according to claim 7, It is characterized in that The steel pipe tail portion (23) comprises a steel pipe head (231) and a steel pipe neck; the steel pipe head (231) is tapered; and the steel pipe head (231) is fixedly connected to the steel pipe body (221) via the steel pipe neck.

9. The underground foundation pit reinforcement support according to claim 8, It is characterized in that The steel pipe neck comprises a steel pipe neck (232), a reinforcement plate (233) and a plurality of grouting holes (234); one end of the steel pipe neck (232) is fixedly connected to the steel pipe body (221), and the other end is fixedly connected to the steel pipe head (231).

10. The underground foundation pit reinforcement support according to claim 9, It is characterized in that The reinforcing plate (233) is fixedly arranged on the outer ring of the steel pipe neck (232), and the grouting holes (234) are all arranged through the reinforcing plate (233).

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