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Method for processing tunnel collapse caused by shallow-buried excavation

A treatment method, a technology of shallow burial and underground excavation, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of high project cost and difficulty in guaranteeing the construction period, so as to reduce project cost, ensure implementation safety, and reduce structural section effect of size

Active Publication Date: 2014-02-19
CHINA RAILWAY SIYUAN GRP SOUTHWEST SURVEY & DESIGN CO LTD +1
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Problems solved by technology

[0002] At present, the characteristics of the safety problem of shallow buried tunnel collapse have attracted the attention of the industry. In order to ensure the safety of the project, the open cut method is generally used for construction. If the site conditions are simple, the slope excavation method with the most economical project cost can be selected for construction; but When the site conditions are limited, it is necessary to choose vertical enclosures such as underground diaphragm walls and bored piles according to the buried depth of the tunnel project, coupled with the construction of the internal support structure, the construction cost of the construction plan is high, and the construction period is difficult to guarantee

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  • Method for processing tunnel collapse caused by shallow-buried excavation
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  • Method for processing tunnel collapse caused by shallow-buried excavation

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] see figure 1 and refer to Figure 2 to Figure 5 As shown, one of the present invention's shallow buried tunnel collapse processing method comprises the steps of:

[0018] The first step is to remove the soil from the landslide to the position of the first excavation line 1;

[0019] The second step is to excavate again according to the boundary line of the re-excavation line 2, and construct the arch foot channel steel backing plate 4 and the initial support 3 in the upper half. After the initial support 3 in the upper half of the collapse area is completed, Carry out vault backfill, backfill to the soil backfill line 7, the arch foot channel steel backing plate 4 and the support profile steel 6 are interwoven into a network layout;

[0020] The third step is to use the step method to carry out the construction in the cave. The step method is one of the const...

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Abstract

The invention relates to a method for processing tunnel collapse caused by shallow-buried excavation. The method comprises the first step of clearing soil bodies at the collapse part to a primary excavation line, the second step of carrying out secondary excavation according to the borderline of a secondary excavation line, constructing arch foot channel steel underboardings and upper half primary supports and then backfilling a vault to a soil body backfilling line, the third step of carrying out inside-tunnel construction by adopting the benching stepping method, the fourth step of constructing lower half primary supports and closing the lower half primary supports into rings by adopting the alternative bay method, and the fifth step of carrying out secondary lining construction on inverted arches at the bottom of a tunnel and then carrying out secondary lining construction on the upper portion of the tunnel by adopting lining trolleys. Through the combination of design construction and construction steps of the design construction, the method for processing the tunnel collapse caused by the shallow-buried excavation is completed. Therefore, the good effects that engineering investments are saved, and the construction period of the tunnel and safety in construction are guaranteed are achieved.

Description

technical field [0001] The invention relates to the field of construction engineering, in particular to a method for treating the collapse of a shallow buried tunnel. Background technique [0002] At present, the characteristics of the safety problem of shallow buried tunnel collapse have attracted the attention of the industry. In order to ensure the safety of the project, the open cut method is generally used for construction. If the site conditions are simple, the slope excavation method with the most economical project cost can be selected for construction; but When the site conditions are limited, it is necessary to choose vertical enclosures such as underground diaphragm walls and bored piles according to the buried depth of the tunnel project. In addition, the construction of the internal support structure type construction, the construction cost of the project is high, and the construction period is difficult to guarantee. Contents of the invention [0003] In orde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/01E21D11/00E21D11/14E21D11/10
Inventor 裴利华林东杨均陈星曾新平乐师军
Owner CHINA RAILWAY SIYUAN GRP SOUTHWEST SURVEY & DESIGN CO LTD
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