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A subsidence control structure and construction method for tunnels in weak ground

A technology for tunnel settlement and weak ground, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve problems such as difficult to control settlement, and achieve the effects of fully guaranteed connection strength, simple construction methods, and good economics

Active Publication Date: 2020-12-08
CHINA RAILWAY DESIGN GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a subsidence control structure and construction method for tunnels in weak strata, so as to solve the problem that the subsidence is not easy to control when the tunnel passes through an ultra-deep and weak section

Method used

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  • A subsidence control structure and construction method for tunnels in weak ground
  • A subsidence control structure and construction method for tunnels in weak ground
  • A subsidence control structure and construction method for tunnels in weak ground

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Embodiment

[0046] Please refer to figure 1 , a subsidence control structure for tunnels in weak formations, comprising a plurality of tunnel units 10 connected in sequence. The tunnel unit 10 includes a first section of main tunnel 11 , a second section of main tunnel 12 , a third section of main tunnel 13 , a first section of shaft 21 , a second section of shaft 22 and a tilting tunnel 30 . The first section of the main tunnel 11, the second section of the main tunnel 12 and the third section of the main tunnel 13 are sequentially connected to form a main tunnel, and the second section of the main tunnel 12 and the third section of the main tunnel 13 are extensions of the first section of the main tunnel 11 .

[0047]The first section of the shaft 21 and the second section of the shaft 22 are vertically arranged and connected sequentially from top to bottom, and the second section of the shaft 22 is an extension of the first section of the shaft 21 . The top of the first section of th...

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Abstract

The invention discloses a weak formation tunnel settlement control structure and a construction method thereof, and belongs to the technical field of tunnel settlement control. The weak formation tunnel settlement control structure is characterized in that one or more tunnel units are included; the tunnel units comprise main tunnels, vertical shafts and oblique supporting tunnels; the top ends ofthe vertical shafts are connected with the main tunnels, and the two ends of the oblique supporting tunnels are connected with the main tunnels and the vertical shafts correspondingly to enable the main tunnels and the vertical shafts to be each in an oblique shape; and the main tunnels, the vertical shafts and the oblique supporting tunnels are provided with primary supporting structures and secondary lining structure correspondingly. After the vertical shafts and the oblique supporting tunnels are connected with the main tunnels, the main tunnels are effectively supported trough the primarysupporting structures and the secondary lining structure of the vertical shafts and the oblique supporting tunnels, the connecting strength can be fully ensured, rigidity is large, structure settlement and deformation can be effectively and quantificationally controlled, and line types and clearances of the tunnels can be fully ensured.

Description

technical field [0001] The invention relates to the technical field of tunnel settlement control, in particular to a tunnel settlement control structure and construction method in soft ground. Background technique [0002] When the tunnel passes through a certain range of ultra-deep and weak areas, the tunnel structure is prone to large settlement over time, no matter in the construction stage or the long-term operation stage, which seriously affects the tunnel alignment, clearance and structural safety. The traditional methods of controlling settlement mostly use stratum grouting reinforcement or densely packed pile foundations to solve long-term settlement problems. The grouting reinforcement method is only applicable to situations within a certain depth (such as within 10 or 15m). Finally, due to the increasing difficulty of drilling and grouting, the effect of grouting is difficult to guarantee, and the cost of large-scale grouting is unacceptable. Close-packed pile fou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/00E21D11/14E21D11/10
CPCE21D11/00E21D11/105E21D11/14
Inventor 白鸿国苏伟高树峰李岩曾青郑余朝翁东郁张弛章慧健苏哿王成孙杰刘海达史天龙冯天炜陈宇李铁钟司君岭
Owner CHINA RAILWAY DESIGN GRP CO LTD
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