Unlock instant, AI-driven research and patent intelligence for your innovation.

Prefabricated hollow concrete-filled steel tube supporting member, inner supporting system and construction method

A technology of hollow steel pipes and supporting components, which can be used in basic structure engineering, excavation, building construction, etc. It can solve the problems of non-compliance, labor and material resources, and poor deformation resistance, so as to ensure integrity and safety, and facilitate transportation and installation, the effect of strong deformation resistance

Pending Publication Date: 2021-02-02
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
View PDF0 Cites 2 Cited by
  • 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 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 construction of concrete supports 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 does not conform to 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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Prefabricated hollow concrete-filled steel tube supporting member, inner supporting system and construction method
  • Prefabricated hollow concrete-filled steel tube supporting member, inner supporting system and construction method
  • Prefabricated hollow concrete-filled steel tube supporting member, inner supporting system and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Such as Figure 3-Figure 6 As shown, this embodiment provides a prefabricated hollow concrete-filled steel tube support member 3, including a steel tube 11 and a steel structure at the end; both ends of the steel tube 11 are welded with a steel structure at the end; the steel tube 11 is poured with filled concrete 16. The filled concrete 16 has a hollow part penetrating along the supporting direction; the filled concrete 16 is equipped with a steel skeleton and a plurality of corrugated pipes 36, and the two ends of the steel skeleton are respectively connected to the steel structures at both ends; Each of the bellows 36 is stretched with prestressed longitudinal ribs 13 and filled with cement slurry. Both ends of the prestressed longitudinal ribs 13 protrude from the bellows 36 and are respectively anchored in the steel structure at both ends. . The prefabricated hollow concrete-filled steel pipe support member 3 of this embodiment is a hollow member filled with concr...

Embodiment 2

[0073] Such as figure 1 and figure 2 As shown, the present embodiment provides an internal support system, including an enclosure structure 1, a crown beam 2, a waist beam, and an assembled inner support; the top of the enclosure structure 1 is provided with a crown beam 2, and the enclosure structure 1 is provided with a waist beam, and the assembled inner support is supported between the opposite sides of the waist beam and the opposite sides of the crown beam 2; the assembled inner support is composed of a plurality of the above-mentioned The prefabricated hollow concrete-filled steel tube support members 3 are spliced ​​together; the crown beam 2 or the waist beam are pre-embedded with embedded parts 4, and the two ends of the prefabricated inner support are connected with the embedded parts 4 on both sides respectively. connect. The hollow parts of the multiple prefabricated hollow concrete-filled steel tube support members 3 of the prefabricated inner support of this ...

Embodiment 3

[0085] This embodiment provides a construction method for the prefabricated hollow concrete-filled steel tube support member 3 provided in Embodiment 1, which includes the following steps:

[0086] S1. In the steel structure processing plant, the end steel structure and the steel pipe 11 are integrally processed to form a prefabricated composite steel member, such as image 3 shown;

[0087] S2. Transport the prefabricated composite steel member to the prefabricated pipe pile production factory, bind the ordinary longitudinal bars 14 and stirrups 12 to form a steel skeleton, then put the prefabricated composite steel member and the steel skeleton into a prefabricated pipe pile mold as a whole, and then place it on the steel pipe Fix the corrugated pipe 36 at the corresponding position in 11, reserve the grouting pipe and the grouting pipe, then pour the filling concrete 16 in the steel pipe 11 and reserve the hollow part;

[0088] S3. When the concrete reaches the design stre...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of underground foundation pit engineering, and particularly relates to a prefabricated hollow concrete-filled steel tube supporting member and a construction method. The prefabricated hollow concrete-filled steel tube supporting member comprises steel tubes and end head steel structures; the end head steel structures are welded to the two ends of the steel tubes; filling concrete is poured in the steel tubes, and hollow parts penetrating in the supporting direction are arranged in the filling concrete; steel reinforcement frameworks and a pluralityof corrugated tubes are arranged in the filling concrete, and the two ends of the steel reinforcement frameworks are correspondingly connected with the two end head steel structures; and prestressed longitudinal bars are tensioned in the corrugated tubes, cement paste is poured into the corrugated tubes, and the two ends of the prestressed longitudinal bars extend out of the corrugated tubes and are anchored in the two end head steel structures. The invention further provides an inner supporting system and a construction method. The adopted fabricated inner support is formed by splicing the prefabricated hollow concrete-filled steel tube support members. The bearing capacity, the deformation resistance, the integrity and the joint rigidity of the fabricated support can be improved, and thefabricated support is convenient to disassemble and convenient to recycle, transport and install.

Description

technical field [0001] The invention belongs to the technical field of underground foundation pit engineering, and in particular relates to a prefabricated hollow steel tube concrete support member, an internal support system and a construction method. 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 Pounding, maintenance, and later demolition, t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E02D17/04E04G21/12
CPCE02D17/04E02D2300/002E02D2300/0029E04G21/121
Inventor 欧阳冬雷崇刘国宝李成亮赵晨阳张建明邰家醉李浩
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP