Detachable steel tube section construction method used for freezing method construction in tunnel contact channel

A technology of communication channel and construction method, applied in the field of steel pipe sheet structure construction, can solve problems such as affecting the safety of tunnel structures, and achieve the effects of reducing adverse effects, weakening stress concentration effects, and improving safety

Active Publication Date: 2017-04-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Different procedures in the construction process of the freezing method will lead to varying degrees of changes in the distribution of external forces acting on adjacent segments, causing unpredictable segment deformation and affecting the safety of the tunnel structure

Method used

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  • Detachable steel tube section construction method used for freezing method construction in tunnel contact channel
  • Detachable steel tube section construction method used for freezing method construction in tunnel contact channel
  • Detachable steel tube section construction method used for freezing method construction in tunnel contact channel

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Embodiment Construction

[0022] The present invention will be further elaborated below in conjunction with the accompanying drawings.

[0023] Such as figure 1 As shown, the present invention provides a detachable steel pipe segment suitable for the freezing method construction at the tunnel communication passage, including a non-detachable part 1 and a detachable part 2 .

[0024] Such as image 3 As shown, the non-detachable part 1 includes an outer thin steel plate 1-1, a flexible transition layer 1-2 and an inner steel structural segment 1-3. During specific construction, the outer thin steel plate 1-1 is a 6mm steel plate; the flexible transition layer 1-2 is a thin rubber cushion layer, and the mesh of the same specification is evenly distributed on the rubber cushion layer, and penetrates the thin rubber cushion layer; the inner steel structure Segments 1-3 can be designed according to ordinary steel pipe segments. It should be emphasized that the cross-sectional area of ​​the mesh is less t...

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Abstract

The invention relates to a detachable steel tube section construction method used for freezing method construction in a tunnel contact channel. According to the method, apart from common tunnel segment parts 3, non-detachable parts 1 and detachable parts 2 are further adopted. The detachable parts 2 are arranged in the tunnel contact channel, the non-detachable parts 1 are arranged in the peripheries of the detachable parts 2, the detachable parts 2 are connected with the common tunnel segment parts 3 through the non-detachable parts 1, and accordingly, a whole detachable steel tube section is formed, wherein each non-detachable part 1 is sequentially provided with three layers, namely, a thin steel plate outer layer, a flexible transition layer and a steel structure segment inter layer from outside to inside. The construction method comprises the following steps that the detachable steel tube section is mounted according to the description; freezing holes and pressure released holes are constructed; the freezing method construction is carried out to form a freezing curtain; and the detachable parts 2 are dissembled, and contact channel construction through a mining method is carried out.

Description

technical field [0001] The invention relates to a construction method of a steel pipe sheet structure at a construction site of a tunnel connecting passage. [0002] technical background [0003] The subway connection channel is generally located in the middle of the interval tunnel, where water collection and drainage pumping stations are often installed, which play the role of connecting the two tunnels, water collection, drainage and fire protection, and are called "escape channels". The construction of the subway communication channel is generally carried out after the main structure of the tunnel is completed. In actual projects, the freezing method is used to freeze the surrounding soil of the communication channel to form a high-strength and well-closed permafrost curtain, and then the mining method is used to construct the communication channel. Excavation and construction, ground freezing and excavation and construction are all carried out in the interval tunnel. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18E21D9/00
CPCE21D9/001E21D11/18
Inventor 张稳军喻国伦张高乐宋晓龙张新新张云旆焦亚磊
Owner TIANJIN UNIV
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