Construction Method of Controlled Settlement Convergence for High Water Level Shallow Buried Loess Tunnel

A technology for loess tunnels and construction methods, applied in tunnels, earth-moving drilling, tunnel lining and other directions, can solve problems such as affecting construction efficiency and personal safety, unguaranteed construction quality, collapse, etc., to maximize economic benefits and easy Operators can grasp the effect of reducing the amount of unearthed
CN110469345BActive Publication Date: 2020-09-18CHINA RAILWAY SIXTH GRP TAIYUAN RAILWAY CONSTR +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA RAILWAY SIXTH GRP TAIYUAN RAILWAY CONSTR
Publication Date
2020-09-18

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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.
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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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