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Construction method and permanent support system of shallow-buried and underground-excavated large-span tunnel

A technology of shallow burial and underground excavation and construction method, applied in tunnels, tunnel linings, earthwork drilling and other directions, can solve the problems of many temporary supports and heavy workload, avoid water seepage, reduce construction period, and reduce construction work. amount of effect

Active Publication Date: 2020-11-10
SHIJIAZHUANG TIEDAO UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a construction method for shallow-buried and underground excavation of large-span tunnels, aiming to solve the technical problems of large workload and many temporary supports in the existing shallow-buried and underground excavation method

Method used

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  • Construction method and permanent support system of shallow-buried and underground-excavated large-span tunnel

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Embodiment Construction

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0039] See Figure 1 to Figure 6 , the construction method of a shallow buried excavation large-span tunnel provided by the present invention is now described. figure 1 It shows the implementation process of a construction method for a shallow-buried long-span tunnel provided by an embodiment of the present invention, and the process is described in detail as follows:

[0040] In step S100, the construction preparation operation is carried out. The construction preparation mainly includes operations such as determining the outer contour of the tunnel, selecting th...

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Abstract

The invention provides a construction method and a permanent support system of a shallow-buried and underground-excavated large-span tunnel, and belongs to the technical field of tunnel engineering construction. The construction method of the shallow-buried and underground-excavated large-span tunnel comprises the steps of construction preparation, pipe jacking operation, reinforced concrete pouring operation, water stopping and waterproofing operation, tunnel excavation and water guiding and waterproofing operation. According to the construction method of the shallow-buried and underground-excavated large-span tunnel, a pipe curtain system structure is reserved in a tunnel structure, so that the pipe curtain system structure forms a supporting and permanent integrated design and construction structure, construction operations such as temporary supporting, steel pipe cutting, stand column welding and reinforcing mesh binding are greatly reduced, the construction workloads can be reduced, the construction period can be shortened, meanwhile, by arranging a water guide waterproof mechanism, underground water which permeates accidentally is discharged out of the tunnel, and the water seepage phenomenon is avoided.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering construction, and more specifically relates to a construction method and a permanent support system for shallow-buried and underground excavated large-span tunnels. Background technique [0002] With the acceleration of urbanization, more and more large-scale underground structures are built under urban roads or important buildings, such as urban underground tunnels, subway stations, underground parking lots, etc. At present, the construction of urban underground tunnels, urban subway stations, underground parking lots and other projects under existing roads or buildings mainly adopts the shallow buried underground excavation method. The pipe-curtain construction method and the new pipe-curtain construction method are often used for shallow-buried large-span underground excavation tunnels with strict settlement control. [0003] The pipe curtain construction method adopts the medium an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/00E21D9/10E21D11/10E21D11/14E21D11/38E21F16/02
CPCE21D9/00E21D9/10E21D11/10E21D11/14E21D11/38E21F16/02Y02E10/20
Inventor 刘勇韩石张艳青李占先宋玉香张旭东
Owner SHIJIAZHUANG TIEDAO UNIV
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