Foundation pit supporting high-friction steel pipe

Abstract

The utility model relates to the technical field of foundation pit supporting, in particular to a foundation pit supporting high-friction steel pipe which comprises a steel pipe body, a steel pipe connecting sleeve, a stress gasket and a friction sleeve, sleeve connection holes are formed in the stress gasket at equal intervals, supporting rods are welded in the sleeve connection holes in a sleeved mode, and sealing plates are welded to the bottoms of the supporting rods. A grouting pipe penetrates through the axis of the sealing plate, a steel pipe connecting sleeve is welded to the bottom of the sealing plate, and a steel pipe body is arranged in the steel pipe connecting sleeve in a sleeved mode. Friction sleeves are welded to the outer side of the steel pipe body in a sleeving mode at equal intervals, friction protrusions are distributed on the outer sides of the friction sleeves at equal intervals, and grouting holes are formed in the positions, located between the friction sleeves, of the outer side of the steel pipe body. An embedding and extruding effect is formed between the foundation pit supporting steel pipe and a soil body, the integrity of connection is improved, the friction force between the steel pipe and the soil is increased through the friction protrusions outside the friction sleeve, and therefore the high friction effect of the steel pipe is greatly achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, and particularly relates to a high-friction steel pipe for foundation pit support. Background Technique

[0002] Foundation pit support is an important link in construction, especially in underground projects with large excavation depths and soft soil masses. In order to prevent soil collapse, ensure the safety of construction personnel and equipment, and protect the stability of adjacent buildings and underground pipelines, scientific foundation pit support design and construction must be carried out. The foundation pit support adopts shotcrete with wire mesh and presses a certain number of steel pipes into the side wall of the foundation pit to play a role in fixing the wire mesh.

[0003] The steel pipes for foundation pit support cannot form an interlocking effect between the steel pipes and the soil to improve the integrity of the connection, nor can they increase the friction with the soil, thus greatly achieving the high-friction effect of the steel pipes. Summary of the Invention

[0004] Aiming at the problems in the prior art, the utility model provides a high-friction steel pipe for foundation pit support, which forms an interlocking effect between the steel pipe for foundation pit support and the soil, improves the integrity of the connection, and the friction protrusions outside the friction sleeve increase the friction with the soil, thus greatly achieving the high-friction effect of the steel pipe.

[0005] The technical solution adopted by the utility model to solve its technical problems is a high-friction steel pipe for foundation pit support, which includes a steel pipe main body, a steel pipe connecting sleeve, a stress washer and a friction sleeve. Socket holes are equidistantly arranged on the stress washer. A support rod is sleeved and welded in the socket hole, and a sealing plate is welded to the bottom of the support rod. A grouting pipe penetrates through the center of the sealing plate. A steel pipe connecting sleeve is welded to the bottom of the sealing plate, and the steel pipe main body is sleeved in the steel pipe connecting sleeve;

[0006] Friction sleeves are equidistantly sleeved and welded on the outer side of the steel pipe main body, and friction protrusions are equidistantly arranged on the outer side of the friction sleeve. Grouting holes are arranged on the outer side of the steel pipe main body and between the friction sleeves. Anti-rust curing layers are coated on both the inner surface layer and the outer surface layer of the steel pipe main body.

[0007] By adopting the above technical solution, an interlocking effect is formed between the steel pipe for foundation pit support and the soil, the integrity of the connection is improved, and the friction protrusions outside the friction sleeve increase the friction with the soil, thus greatly achieving the high-friction effect of the steel pipe.

[0008] Specifically, the grouting pipe is communicated with the steel pipe main body, and a grouting valve is arranged at one end of the grouting pipe.

[0009] Specifically, locking bolts are equidistantly arranged on the outer side of the steel pipe connecting sleeve through screw holes.

[0010] Specifically, the rust-proof and solidifying layer is made of polyurethane material.

[0011] Specifically, the friction protrusions and the friction sleeves are integrally formed and made of the same material as the steel pipe body.

[0012] By adopting the above technical solution, the friction protrusions and the friction sleeves are integrally formed, making the overall effect remarkable, increasing the friction with the soil, and the effect is remarkable.

[0013] Specifically, a conical pipe head is welded to the bottom of the steel pipe body and is made of the same material as the steel pipe body.

[0014] By adopting the above technical solution, the conical pipe head welded to the bottom of the steel pipe body is used to reduce the soil penetration resistance of the steel pipe body.

[0015] The beneficial effects of the present utility model:

[0016] For the high-friction steel pipe for foundation pit support of the present utility model, during the process of foundation pit support, the steel pipe needs to be pressed into the side wall of the foundation pit through an external machine. The friction sleeves are equidistantly sleeved on the outside of the steel pipe body, and a depression area is formed between the friction sleeves, which is convenient for the soil to squeeze into the depression area to form resistance when being pressed into the soil, forming an interlocking effect with the soil, improving the integrity of the connection, and the friction protrusions on the outside of the friction sleeves increase the friction with the soil, thereby greatly realizing the high-friction effect of the steel pipe.

[0017] For the high-friction steel pipe for foundation pit support of the present utility model, after the steel pipe is inserted into the soil, the grouting valve is opened, and grouting is carried out into the steel pipe body through the grouting pipe. The cement slurry gushes out from the grouting holes and enters the soil layer. After hardening, it plays a role in improving the lateral resistance of the soil and enhancing the support effect on the foundation pit. The rust-proof and solidifying layer is made of polyurethane material, which improves the rust-proof and anti-corrosion effects of the steel pipe body, is wear-resistant, the coating is not easy to peel off, and is durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the grouting valve and grouting pipe structures of the present utility model;

[0021] Figure 3 is a schematic diagram of the socket holes of the present utility model;

[0022] Figure 4 is a schematic diagram of the rust-proof and solidifying layer of the present utility model.

[0023] In the figure: 1, force-bearing washer; 2, support rod; 3, sealing plate; 4, steel pipe connecting sleeve; 5, steel pipe main body; 6, friction protrusion; 7, friction sleeve; 8, grouting hole; 9, conical pipe head; 10, locking bolt; 11, grouting valve; 12, grouting pipe; 13, socket hole; 14, rust-proof curing layer. Specific embodiments

[0024] In order to make the technical means, creative features, achieved purposes and effects realized by the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0025] In order to form an interlocking effect between the foundation pit support steel pipe and the soil, improve the integrity of the connection, and the friction protrusions 6 outside the friction sleeve 7 increase the friction with the soil, thus greatly realizing the high friction effect of the steel pipe, as Figures 1-4 shown, a high-friction steel pipe for foundation pit support described in the present utility model includes a steel pipe main body 5, a steel pipe connecting sleeve 4, a force-bearing washer 1 and a friction sleeve 7. Socket holes 13 are equidistantly opened on the force-bearing washer 1. A support rod 2 is sleeved and welded in the socket hole 13, and the bottom of the support rod 2 is welded with a sealing plate 3. A grouting pipe 12 penetrates through the center of the sealing plate 3. The bottom of the sealing plate 3 is welded with a steel pipe connecting sleeve 4, and a steel pipe main body 5 is sleeved in the steel pipe connecting sleeve 4;

[0026] The outer side of the steel pipe main body 5 is equidistantly sleeved and welded with friction sleeves 7, and friction protrusions 6 are equidistantly arranged on the outer side of the friction sleeves 7. Grouting holes 8 are opened on the outer side of the steel pipe main body 5 and between the friction sleeves 7. The inner and outer surfaces of the steel pipe main body 5 are coated with a rust-proof curing layer 14.

[0027] During use, an interlocking effect is formed between the foundation pit support steel pipe and the soil, improving the integrity of the connection, and the friction protrusions 6 outside the friction sleeve 7 increase the friction with the soil, thus greatly realizing the high friction effect of the steel pipe.

[0028] Exemplarily, as Figure 1 , 2 shown, the present utility model further includes that the grouting pipe 12 is communicated with the steel pipe main body 5, and a grouting valve 11 is arranged at one end of the grouting pipe 12.

[0029] During use, after the steel pipe is inserted into the soil, the grouting valve 11 is opened to grout the steel pipe main body 5 through the grouting pipe 12.

[0030] Exemplarily, as Figure 1 shown, the present utility model further includes that locking bolts 10 are equidistantly arranged on the outer side of the steel pipe connecting sleeve 4 through screw holes.

[0031] During use, the locking bolts 10 are used to facilitate fixing the steel pipe main body 5 in the steel pipe connecting sleeve 4.

[0032] Exemplarily, as Figure 4 shown, the present utility model further includes that the rust-proof curing layer 14 is specifically made of polyurethane material.

[0033] During use, it improves the rust-proof and anti-corrosion effects of the steel pipe main body 5, is wear-resistant, the coating is not easy to peel off, and is durable.

[0034] Exemplarily, as Figure 1 shown, the present utility model further includes that the friction protrusions 6 and the friction sleeves 7 are integrally formed and made of the same material as the steel pipe main body 5.

[0035] During use, the friction protrusions 6 and the friction sleeves 7 are integrally formed, making the overall effect remarkable, improving the friction with the soil body, and the effect is remarkable.

[0036] Exemplarily, as Figure 1 shown, the present utility model further includes that a conical pipe head 9 is welded to the bottom of the steel pipe main body 5 and the conical pipe head 9 is made of the same material as the steel pipe main body 5.

[0037] During use, the conical pipe head 9 welded to the bottom of the steel pipe main body 5 is used to reduce the soil penetration resistance of the steel pipe main body 5.

[0038] When the present utility model is in use, during the process of foundation pit support, the steel pipe needs to be pressed into the side wall of the foundation pit through an external machine. The friction sleeves 7 are equidistantly sleeved on the outside of the steel pipe main body 5, and a depression area is formed between the friction sleeves 7, which is convenient for the soil body to squeeze into the depression area to form resistance when being pressed into the soil body, forming an interlocking effect with the soil body and improving the integrity of the connection;

[0039] And the friction protrusions 6 on the outside of the friction sleeves 7 increase the friction with the soil, thereby greatly realizing the high-friction effect of the steel pipe. After the steel pipe is inserted into the soil, the grouting valve 11 is opened, and grouting is carried out on the steel pipe main body 5 through the grouting pipe 12. The cement slurry emerges from the grouting holes 8 and enters the soil layer, and after hardening, it plays a role in improving the lateral resistance of the soil body and improving the support effect on the foundation pit;

[0040] By using that the rust-proof curing layer 14 is specifically made of polyurethane material, it improves the rust-proof and anti-corrosion effects of the steel pipe main body 5, is wear-resistant, the coating is not easy to peel off, and is durable.

[0041] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments, and the above-described embodiments and descriptions in the specification are only used to illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of protection required by the present utility model. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A high-friction steel pipe for foundation pit support, characterized in that, It includes a steel pipe main body (5), a steel pipe connecting sleeve (4), a stress washer (1) and a friction sleeve (7). Socket holes (13) are equidistantly formed in the stress washer (1). A support rod (2) is sleeved and welded in the socket hole (13), and a sealing plate (3) is welded to the bottom of the support rod (2). A grouting pipe (12) penetrates through the center of the sealing plate (3). A steel pipe connecting sleeve (4) is welded to the bottom of the sealing plate (3), and a steel pipe main body (5) is sleeved in the steel pipe connecting sleeve (4); Friction sleeves (7) are equidistantly sleeved and welded on the outer side of the steel pipe main body (5), and friction protrusions (6) are equidistantly arranged on the outer side of the friction sleeves (7). Grouting holes (8) are formed on the outer side of the steel pipe main body (5) and between the friction sleeves (7). Anti-rust curing layers (14) are coated on both the inner surface layer and the outer surface layer of the steel pipe main body (5).

2. The high-friction steel pipe for foundation pit support according to claim 1, characterized in that, The grouting pipe (12) is communicated with the steel pipe main body (5), and a grouting valve (11) is arranged at one end of the grouting pipe (12).

3. A high-friction steel pipe for foundation pit support according to claim 1, characterized in that, Locking bolts (10) are equidistantly arranged on the outer side of the steel pipe connecting sleeve (4) through screw holes.

4. A high-friction steel pipe for foundation pit support according to claim 1, characterized in that, The anti-rust curing layer (14) is specifically made of polyurethane material.

5. A high-friction steel pipe for foundation pit support according to claim 1, characterized in that, The friction protrusions (6) and the friction sleeves (7) are integrally formed and made of the same material as the steel pipe main body (5).

6. A high-friction steel pipe for foundation pit support according to claim 1, characterized in that, A tapered pipe head (9) is welded to the bottom of the steel pipe main body (5), and the tapered pipe head (9) is made of the same material as the steel pipe main body (5).

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