Hollow concrete-filled steel pipe support, prefabricated part, construction method, and supporting system

A hollow steel pipe and concrete technology, applied in excavation, infrastructure engineering, construction, etc., can solve the problems of restricting on-site construction progress, non-conformance, labor and material resources, etc., to facilitate factory production, easy transportation and installation, installation and The effect of easy disassembly

Pending Publication Date: 2020-12-04
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Traditional cast-in-place concrete supports are widely used in underground projects due to their advantages of high rigidity, good integrity, safety and reliability, but there are also prominent problems and shortcomings: (1) Expensive and high investment: concrete supports are temporary projects, The main body of the station structure is completed, that is, the external transport is broken, and the investment in temporary abandoned projects is high. Generally, underground stations amount to millions, and complex stations amount to tens of millions; (2) Time-consuming and long construction period: concrete support formwork, binding steel bars, pouring vibration Pounding, maintenance, and later demolition, the whole process lasts for several months, which seriously restricts the progress of on-site construction; (3) Laborious and difficult: the concrete support construction is difficult, and the demolition construction after use will consume a lot of manpower and material resources; (4) ) is not environmentally friendly, and concrete destroys waste residues to pollute the environment, which is not in line with the development direction of green construction, environmental protection and energy saving
[0003] Although the traditional steel pipe support can be recycled and the construction is more convenient, it can only bear the pressure between it and the retaining structure of the foundation pit, the integrity is poor, and the deformation resistance is poor, which has become a weak link in the safety of the foundation pit
[0004] In the prefabricated supports currently seen, the weak links are mostly at the connecting nodes, and rigid connections cannot be realized at the nodes, resulting in insufficient overall stability of the foundation pit

Method used

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  • Hollow concrete-filled steel pipe support, prefabricated part, construction method, and supporting system
  • Hollow concrete-filled steel pipe support, prefabricated part, construction method, and supporting system
  • Hollow concrete-filled steel pipe support, prefabricated part, construction method, and supporting system

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Such as Figure 2-Figure 4 As shown, this embodiment provides a hollow steel tube concrete support prefabricated part 1, which includes a steel tube 4 and a joint steel plate 10, the steel tube 4 is filled with concrete 6, and the concrete 6 has a hollow part 9 penetrating in the axial direction; The concrete 6 is equipped with a steel skeleton; both ends of the steel pipe 4 are welded with annular joint steel plates 10, the inner side of the joint steel plate 10 is connected with the steel skeleton, and the outer side of the joint steel plate 10 is located on the Steel pipe 4 outside. The hollow concrete-filled steel tube support prefabricated part 1 of this embodiment is a hollow member filled with concrete 6 inside the steel tube 4, which can not only give full play to the advantages of the two materials of steel and concrete, but also has high cost performance. Compared with the pure steel support, it has significant economic benefits. Compared with the concrete su...

Embodiment 2

[0047] Such as Figure 2-Figure 4 As shown, the present embodiment provides a construction method for the hollow concrete-filled steel tube support prefabricated part 1, including the following steps:

[0048] S1. According to the design drawings, prepare steel pipe 4, joint steel plate 10, spiral stirrup 8, longitudinal reinforcement 7, stiffening plate, joint inner liner 14, joint outer liner 13 and inner cladding pipe 15;

[0049] S2. The steel pipe 4 has reserved studs 5 on its inner wall during production, and the spiral stirrup 8 and longitudinal reinforcement 7 are arranged in the steel pipe 4;

[0050] S3, welding joint steel plates 10 at both ends of the steel pipe 4;

[0051] S4. Weld the joint inner lining pipe 14 and the joint outer lining pipe 13 on the inner side and the outer side of the two ends of the steel pipe 4, so that the joint inner lining pipe 14 and the joint outer lining pipe 13 are connected with the steel pipe 4 and the joint steel plate 10;

[00...

Embodiment 3

[0058] Such as image 3 As shown, this embodiment provides a hollow concrete-filled steel pipe support, which is formed by splicing a plurality of hollow concrete-filled steel pipe support prefabricated parts 1 provided in Embodiment 1, or a plurality of hollow steel pipes fabricated by the construction method provided in Embodiment 2 The concrete supporting prefabricated parts 1 are spliced ​​together; the part of the joint steel plate 10 extending outside the steel pipe 4 is provided with a plurality of bolt holes in the circumferential direction, and the adjacent joint steel plates of the adjacent hollow steel pipe concrete supporting prefabricated parts 1 Corresponding bolt holes on the 10 are connected by bolts 11 respectively.

[0059] The hollow concrete-filled steel pipe support in this embodiment is spliced ​​by multiple hollow concrete-filled steel pipe support prefabricated parts 1, and the hollow concrete-filled steel pipe support prefabricated part 1 and the hollo...

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PUM

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Abstract

The invention belongs to the technical field of foundation pit engineering, and particularly relates to a hollow concrete-filled steel pipe supporting prefabricated part and a construction method thereof. The hollow concrete-filled steel pipe supporting prefabricated part comprises a steel pipe and a connector steel plate, the steel pipe is filled with concrete, and a hollow part penetrating in the axial direction is arranged in the concrete; a steel reinforcement framework is arranged in the concrete; annular joint steel plates are welded to the two ends of the steel pipe; and the inner sidesof the joint steel plates are connected with the steel reinforcement framework, and the outer sides of the joint steel plates are located outside the steel pipe. The invention further provides a hollow concrete-filled steel pipe support and a supporting system. The hollow concrete-filled steel pipe support is formed by connecting and assembling a plurality of the hollow concrete-filled steel pipesupport prefabricated parts through bolts. The supporting system comprises an enclosure structure, a top beam, a waist beam, and the hollow concrete-filled steel pipe support. The hollow steel pipe concrete supports are supported between the two opposite sides of the top beam and between the two opposite sides of the waist beam. The bearing capacity, the deformation resistance, the integrity, andthe middle joint strength of the hollow steel pipe concrete support can be improved.

Description

technical field [0001] The invention belongs to the technical field of underground foundation pit engineering, and in particular relates to a hollow steel tube concrete support, a prefabricated part, a construction method and a support system. Background technique [0002] Traditional cast-in-place concrete supports are widely used in underground projects due to their advantages of high rigidity, good integrity, safety and reliability, but there are also prominent problems and shortcomings: (1) Expensive and high investment: concrete supports are temporary projects, The main body of the station structure is completed, that is, the external transport is broken, and the investment in temporary abandoned projects is high. Generally, underground stations amount to millions, and complex stations amount to tens of millions; (2) Time-consuming and long construction period: concrete support formwork, binding steel bars, pouring vibration Pounding, maintenance, and later demolition, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 欧阳冬张建明王华兵熊朝辉林作忠雷崇徐军林罗会平刘国宝董俊王永伟李成亮刘习超邰家醉
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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