Hollow steel pipe concrete supporting structure

Abstract

The utility model discloses a hollow steel pipe concrete supporting structure, belongs to the technical field of foundation pit supporting, and solves the problems that an existing steel pipe concrete support is high in concrete consumption and long in construction period. The device comprises a hollow steel pipe, the hollow steel pipe comprises an outer-layer steel pipe and an inner-layer steel pipe which are coaxially arranged, the top and the bottom of the annular surface of the outer-layer steel pipe are respectively provided with at least one exhaust hole and one pouring hole, and the space between the outer-layer steel pipe and the inner-layer steel pipe is filled with a sulfur concrete layer through the pouring holes. The foundation pit supporting structure is small in dead weight, has the advantages of early strength and high strength and can support a foundation pit in a short time, the overall construction period is shortened, the hollow steel pipe saves 50%-70% of concrete consumption compared with a traditional steel pipe, the sulfur concrete saves 50%-70% of concrete consumption compared with a traditional cement concrete, and the cost is reduced. The sulfur concrete can reach 65% of the ultimate strength after being poured for half an hour, has the characteristics of early strength and high strength, and shortens the construction period.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit support, in particular to a hollow steel tube concrete support structure. Background Art

[0002] With the rapid development of urbanization, urban construction continues to grow both high-rise and underground, and foundation pits are becoming deeper. This has led to increasing construction difficulty, making safety a paramount concern during foundation pit construction. Foundation pit support, including steel pipe supports, suffers from low rigidity and an inability to control overall pit deformation.

[0003] In order to solve the above problems, the existing technology adopts steel tube concrete support, and fills concrete in the steel tube to improve the rigidity of the steel tube. However, the filled concrete is not only heavy, but also requires a long time to cure before it can play a role. It cannot meet the strength and rigidity requirements of the foundation pit support in a short time, resulting in a long construction period. Utility Model Content

[0004] In view of the above problems in the prior art, the present invention provides a hollow steel tube concrete support structure, which solves the problems of the prior art steel tube concrete support having high concrete consumption and long construction period.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A hollow steel tube concrete support structure is provided, comprising a hollow steel tube, wherein the hollow steel tube comprises an outer steel tube and an inner steel tube arranged coaxially, and at least one exhaust hole and one pouring hole are respectively provided on the top and bottom of the annular surface of the outer steel tube, and a sulfur concrete layer is filled between the outer steel tube and the inner steel tube through the pouring hole.

[0007] The working principle of this solution is that during installation, a hollow steel pipe is hoisted into the foundation pit using an external crane. A vent hole is positioned above the pipe, and sulfur concrete is injected into the pipe through the injection hole to form a sulfur concrete layer, enhancing the pipe's strength. Gas is then discharged through the vent hole, preventing gas stagnation and impacting the strength of the sulfur concrete layer. Compared to traditional cement concrete, sulfur concrete reaches 65% of its ultimate strength within half an hour of pouring, exhibiting early strength and high strength, shortening the construction period. Furthermore, the hollow steel pipe consumes 50% to 70% less concrete than traditional steel pipes and is lighter in weight. Furthermore, when dismantling the foundation pit support structure, the pipe is simply heated to convert the internal sulfur concrete layer into liquid sulfur concrete. Once the liquid sulfur concrete flows out of the injection hole, the pipe can be removed, allowing for reuse.

[0008] Furthermore, the hollow steel tube also includes two sealing steel plates and multiple partition steel plates. The two sealing steel plates are fixed to the ends of the outer steel tube respectively; the multiple partition steel plates are all annular plate structures and are evenly fixed between the outer steel tube and the inner steel tube. The sealing steel plates serve to seal the ends, while the partition steel plates serve to fix the outer steel tube and the inner steel tube, preventing relative movement between the outer and inner steel tubes.

[0009] Furthermore, each sealing steel plate and each partition steel plate are fixed to the outer steel pipe by a rivet assembly.

[0010] Furthermore, each rivet assembly includes a plurality of rivets that are evenly distributed along the circumference of the outer steel pipe. The even distribution of the rivets can disperse stress.

[0011] Furthermore, an exhaust hole and a pouring hole are provided on the annular surface of the outer steel pipe at a middle position between two adjacent partition steel plates.

[0012] Furthermore, two adjacent exhaust holes and two adjacent filling holes are arranged at equal distances.

[0013] Furthermore, the diameter of each exhaust hole is smaller than the diameter of the injection hole.

[0014] Furthermore, the outer steel pipe and the inner steel pipe have the same length, and the diameter of the outer steel pipe is 1.5 to 2 times the diameter of the inner steel pipe. Such an arrangement can reduce the amount of sulfur concrete used.

[0015] The utility model discloses a hollow steel tube concrete support structure, which has the following beneficial effects:

[0016] 1. The utility model has a small dead weight and has the characteristics of early strength and high strength. It can support the foundation pit in a short time and shorten the overall construction period. Compared with traditional steel pipes, the hollow steel pipe saves 50% to 70% of concrete consumption. Compared with traditional cement concrete, sulfur concrete can reach 65% of the ultimate strength after pouring for half an hour. It has the characteristics of early strength and high strength, which shortens the construction period.

[0017] 2. The utility model is easy to install and disassemble. By heating the hollow steel pipe, the internal sulfur concrete layer is converted into liquid sulfur concrete. After the liquid sulfur concrete flows out from the pouring hole, the hollow steel pipe can be disassembled, which has the advantage of repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the hollow steel tube concrete support structure;

[0019] Figure 2 It is the side view of the hollow steel tube concrete support structure;

[0020] Among them: 1. Outer steel pipe; 2. Inner steel pipe; 3. Sulfur concrete layer; 4. Exhaust hole; 5. Pouring hole; 6. Rivet; 7. Sealing steel plate; 8. Partition steel plate. DETAILED DESCRIPTION

[0021] The specific implementation methods of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be clear that the present invention is not limited to the scope of the specific implementation methods. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all utility model creations using the concept of the present invention are protected.

[0022] This embodiment provides a hollow steel tube concrete support structure. By injecting sulfur concrete into the hollow steel tube to form a sulfur concrete layer 3, the strength and rigidity of the hollow steel tube are improved. Compared with traditional cement concrete, sulfur concrete can reach 65% of its ultimate strength within half an hour of pouring, exhibiting early strength and high strength, shortening the construction period. Furthermore, the hollow steel tube saves 50% to 70% of concrete consumption compared to traditional steel tubes. Therefore, this embodiment solves the problems of existing steel tube concrete supports, which not only require high concrete consumption but also have a long construction period. This will be described in detail below.

[0023] refer to Figure 1 and Figure 2 , a hollow steel tube concrete support structure, including a hollow steel tube and a sulfur concrete layer 3 arranged in the hollow steel tube.

[0024] The hollow steel pipe includes an outer steel pipe 1 and an inner steel pipe 2 which are coaxially arranged. The outer steel pipe 1 and the inner steel pipe 2 have the same length, and the diameter of the outer steel pipe 1 is 1.5 to 2 times the diameter of the inner steel pipe 2. Such an arrangement can reduce the amount of sulfur concrete used.

[0025] The outer steel pipe 1 has at least one vent hole 4 and one injection hole 5 at the top and bottom of its annular surface, respectively. The diameter of each vent hole 4 is smaller than that of the injection hole 5. A sulfur concrete layer 3 is filled between the outer steel pipe 1 and the inner steel pipe 2 through the injection holes 5.

[0026] As a further solution of this embodiment, the hollow steel pipe further includes two sealing steel plates 7 and multiple partition steel plates 8.

[0027] Two sealing steel plates 7 are respectively fixed on both ends of the outer steel pipe 1 to seal the hollow steel pipe.

[0028] The plurality of partition steel plates 8 are all annular plate structures and are evenly fixed between the outer steel pipe 1 and the inner steel pipe 2 .

[0029] Partition plates 8 secure the outer and inner steel tubes 1 and 2, preventing them from moving relative to each other. Two adjacent partition plates 8 divide the corresponding hollow steel tubes into multiple cavities. Each cavity is provided with a vent hole 4 and a pouring hole 5 at the top and bottom of the annular surface of the outer steel tube 1, respectively. Sulfur concrete is filled into the corresponding cavity through the pouring holes 5 and corresponding vent holes 4. The multiple cavities facilitate more uniform pouring.

[0030] As a specific structure for fixing the sealing steel plates 7 and the partition steel plates 8 to the outer steel pipe 1 in this embodiment, each sealing steel plate 7 and each partition steel plate 8 is fixed to the outer steel by a rivet assembly, and each rivet assembly includes a plurality of rivets 6 distributed equidistantly along the circumference of the outer steel pipe 1. The uniform distribution of the rivets 6 is utilized to disperse stress.

[0031] In summary, the working principle of this solution is:

[0032] During installation, the hollow steel pipe is hoisted into the foundation pit using an external crane, with vent hole 4 positioned at the top. Sulfur concrete is then injected into the hollow steel pipe through injection holes 5 to form a sulfur concrete layer 3, enhancing the strength of the hollow steel pipe. Gas within the hollow steel pipe is then discharged through vent hole 4, preventing gas stagnation and the resulting impact on the strength of the sulfur concrete layer 3. Compared to traditional cement concrete, sulfur concrete can reach 65% of its ultimate strength within half an hour of pouring, exhibiting early strength and high strength, shortening the construction cycle. Furthermore, the hollow steel pipe saves 50% to 70% of concrete consumption and has a lower deadweight.

[0033] During disassembly, the hollow steel pipe is heated to convert the sulfur concrete layer 3 inside the hollow steel pipe into liquid sulfur concrete. After the liquid sulfur concrete flows out from the pouring hole 5, the hollow steel pipe is disassembled by a crane to achieve reuse.

[0034] Although the specific embodiments of the utility model are described in detail in conjunction with the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Within the scope described by the claims, various modifications and variations that can be made by those skilled in the art without creative work still fall within the scope of protection of this patent.

Claims

1. A hollow steel tube concrete support structure, characterized in that: The hollow steel pipe comprises an outer steel pipe (1) and an inner steel pipe (2) arranged coaxially, and the top and bottom of the annular surface of the outer steel pipe (1) are respectively provided with at least one exhaust hole (4) and one pouring hole (5), and a sulfur concrete layer (3) is filled between the outer steel pipe (1) and the inner steel pipe (2) through the pouring hole (5).

2. The hollow steel tube concrete support structure according to claim 1, characterized in that: The hollow steel pipe further comprises two sealing steel plates (7) and a plurality of partition steel plates (8), wherein the two sealing steel plates (7) are respectively fixed on the two ends of the outer steel pipe (1); and the plurality of partition steel plates (8) are all annular plate structures and are evenly fixed between the outer steel pipe (1) and the inner steel pipe (2).

3. The hollow steel tube concrete support structure according to claim 2, characterized in that: Each of the sealing steel plates (7) and each of the partition steel plates (8) are fixed to the outer steel pipe (1) via a rivet assembly.

4. The hollow steel tube concrete support structure according to claim 2, characterized in that: Each rivet assembly comprises a plurality of rivets (6) distributed at equal distances along the circumferential direction of the outer steel pipe (1).

5. The hollow steel tube concrete support structure according to claim 4, characterized in that: An exhaust hole (4) and an injection hole (5) are provided on the annular surface of the outer steel pipe (1) at the middle position of two adjacent partition steel plates (8).

6. The hollow steel tube concrete support structure according to claim 5, characterized in that: The two adjacent exhaust holes (4) and the two adjacent filling holes (5) are arranged at equal distances.

7. The hollow steel tube concrete support structure according to claim 1, characterized in that: The diameter of each of the exhaust holes (4) is smaller than the diameter of the filling hole (5).

8. The hollow steel tube concrete support structure according to claim 1, characterized in that: The outer steel pipe (1) and the inner steel pipe (2) have the same length, and the diameter of the outer steel pipe (1) is 1.5 to 2 times the diameter of the inner steel pipe (2).

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