Tunnel segment structure and construction method

A technology for tunnel segments and construction methods, which is applied in tunnels, tunnel linings, earthwork drilling and mining, etc. It can solve the problems of segment errors, cracks, etc., and improve tunnel safety, ensure waterproof performance, and high stability Effect

Inactive Publication Date: 2020-11-20
CHINA RAILWAY 20 BUREAU GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to propose a tunnel segment structure and construction method, aiming to solve the problems in the prior art that the segments are prone to misalignment and cracks during tunnel shield construction in the water-rich layer

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  • Tunnel segment structure and construction method

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0028] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a tunnel segment structure and a construction method, the tunnel segment structure comprises a segment and a fixed pile foundation, the segment is buried in surrounding rock soil, and a grouting layer is arranged between the segment and the surrounding rock soil; the fixed pile foundation is arranged in the grouting layer, the fixed pile foundation comprises a bag device and a grouting pipe communicating with the bag device, grouting is conducted in the bag device through the grouting pipe to form the fixed pile foundation, one side of the fixed pile foundation abuts against the surrounding rock soil, and the other side of the fixed pile foundation abuts against the segment. According to the tunnel segment structure, the wrapping characteristic of the bag device isutilized; the slurry in the bag device can be prevented from being dispersed and diluted; the duct piece and the surrounding rock soil form a whole body; the constraint force of the surrounding rock soil is used for effectively controlling the segment to float upwards, so that the segment is stably arranged in the surrounding rock soil in time, the situations of segment staggering, crack damage and even axis deviation caused by floating upwards after the segment is separated from the shield tail are avoided, the waterproof performance of a tunnel is guaranteed, and the safety of the tunnel isimproved.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a tunnel segment structure and a construction method. Background technique [0002] When the shield machine is constructed under the condition of water-rich stratum, the problem of the floating of the tunnel segment is particularly prominent. The floating of the segment of the shield tunnel means that after the segment comes out of the tail shield, it is affected by factors such as geology, groundwater, and synchronous slurry. Segment upward displacement phenomenon. Partial or overall floating of the segment will directly lead to problems such as segment misalignment, cracks, damage, and even axis deviation. Come waterproof hidden danger and safety hidden danger, affect the quality of the project. In the prior art, hoops are usually used to inject double-liquid slurry outside the segment, but due to the erosion of groundwater in the water-rich layer, the slur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/08E21D9/06E21D11/38
CPCE21D11/08E21D9/0607E21D11/386E21D11/385
Inventor 李增良于祥涛岳琳辉张欢
Owner CHINA RAILWAY 20 BUREAU GRP
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