Construction method for controlling settlement convergence of shallow buried loess tunnel with high water level

A technology for loess tunnels and construction methods, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as unguaranteed construction quality, collapse, affecting construction efficiency and personal safety, etc., to maximize economic benefits and reduce The amount of excavation and the effect of being easy for operators to grasp

Active Publication Date: 2019-11-19
CHINA RAILWAY SIXTH GRP TAIYUAN RAILWAY CONSTR +1
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  • Application Information

AI Technical Summary

Problems solved by technology

How to effectively control the settlement of tunnel construction is the difficulty of tunnel construction, especially for those high water level shallow buried loess tunnels. If the settlement cannot be effectively controlled, not only the construction quality will not be guaranteed, but also the danger of collapse will be faced at any time, which will affect the construction. Efficiency and Personal Safety

Method used

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  • Construction method for controlling settlement convergence of shallow buried loess tunnel with high water level
  • Construction method for controlling settlement convergence of shallow buried loess tunnel with high water level
  • Construction method for controlling settlement convergence of shallow buried loess tunnel with high water level

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Embodiment Construction

[0054] The following is a detailed description of the Level VI shallow-buried loess tunnel of the Dongjin Tunnel excavation section of the XNHS-1 bid section of the new Southwest Ring Road Project of Taiyuan Railway Hub.

[0055] A high-water-level shallow-buried loess tunnel control settlement convergence construction method, as follows:

[0056] 1. Precipitation well

[0057] In this section of the project, the groundwater level is located at the vault. Before the construction of the tunnel, it is necessary to do a good job of dewatering. Only when the water level is 1.5m below the inverted arch can the construction conditions be met. Precipitation wells are arranged at a position 80m in front of the construction workers to pre-pump water in advance. Technicians do a good job of measuring the water level of the precipitation well and making records. The personnel in the cave should observe whether there is any water leakage in the cave. If there is any abnormality, stop t...

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Abstract

The invention discloses a construction method for controlling settlement convergence of a shallow buried loess tunnel with a high water level. The construction method includes the following steps that(1) precipitation of a precipitation well is achieved; (2) the reserved deformation amount is determined; (3) the step height is determined; (4) upper step excavation and preliminary bracing are achieved; (5) an upper step false stull is applied; (6) one sides of middle steps are excavated, and preliminary bracing is achieved; (7) a middle step false stull is applied; (8) one sides of lower stepsare excavated, and preliminary bracing is achieved; (9) primary support closed-loop construction is achieved; (10) secondary lining invert arch pouring is achieved; and (11) pouring of secondary lining arch wall is achieved. According to the method, design is reasonable, economic and social benefits are obvious, energy saving and environmental protection can meet the standard requirements, the technology reaches the advanced level in China, the method is used for quick installation construction of large-span, cross-railway transit T-shaped steel box girders, and the good application and promotion value is achieved.

Description

technical field [0001] The invention belongs to the field of tunnel building construction, in particular to a construction method for controlled subsidence and convergence of high-water-level shallow-buried loess tunnels, which is suitable for the construction of primary support arches in any form of underground excavation soil tunnels. Background technique [0002] The vigorous development of underground engineering has largely alleviated the problem of surface land shortage. And with the continuous progress of the project, people's research on underground engineering has also entered a new stage. How to effectively control the settlement of tunnel construction is the difficulty of tunnel construction, especially for those high water level shallow buried loess tunnels. If the settlement cannot be effectively controlled, not only the construction quality will not be guaranteed, but also the danger of collapse will be faced at any time, which will affect the construction. ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/18E21D21/00
CPCE21D11/10E21D11/18E21D21/008
Inventor 张岳殷浩喜王玉伟申晋峰曹永杰王富强张志恒白雪鹏胡肖肖郑梦琦王俊杰刘晓欢于守江
Owner CHINA RAILWAY SIXTH GRP TAIYUAN RAILWAY CONSTR
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