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Support structure system and construction method of high ground stress soft rock tunnel

A high ground stress and support structure technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems of easy damage of the secondary lining structure, damage of support structures, failure of anchor rods, etc. Carrying capacity, effect of high carrying capacity

Active Publication Date: 2021-09-28
CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problems to be solved are: the conventional tunnel support system and the existing yielding structure are difficult to deal with the continuous excessive deformation of the surrounding rock, the primary support structure is often damaged or deformed, the anchor rod fails, and the secondary lining structure is easily damaged

Method used

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  • Support structure system and construction method of high ground stress soft rock tunnel
  • Support structure system and construction method of high ground stress soft rock tunnel
  • Support structure system and construction method of high ground stress soft rock tunnel

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Embodiment Construction

[0051] Such as Figure 1 to Figure 5 As shown, the high ground stress soft rock tunnel support structure system of the present invention includes the initial support for pressure yield, the pressure energy storage layer 5 and the permanent support structure 6, and the initial support for pressure pressure includes a grid that is fitted to the surrounding rock 1 of the tunnel The steel frame 2 and the shotcrete 3, the outer side of the grid steel frame 2 close to the tunnel surrounding rock 1 is provided with a yielding anchor 4; the two sides of the yielding energy storage layer 5 are respectively close to the inner side of the yielding initial support and the permanent support The outer side of the structure 6 is provided.

[0052]The thickness of the initial support under pressure is 25-40cm. The grid steel frame 2 is formed by a plurality of single steel frames attached to the tunnel surrounding rock 1 and arranged side by side along the tunnel circumference. The spacing i...

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Abstract

The invention relates to the technical field of tunnel support construction, and discloses a high ground stress soft rock tunnel support structure system and a construction method thereof. The present invention includes yielding initial support, yielding energy storage layer and permanent support structure. The yielding initial support includes a grid steel frame and shotcrete arranged in close contact with the surrounding rock of the tunnel, and the outer side of the grid steel frame is close to the surrounding rock of the tunnel. Yield anchors are set on one side; the two sides of the yield energy storage layer are respectively set close to the inner side of the initial yield support and the outer side of the permanent support structure; the yield energy storage layer is an actual Pouring structures, including cement, emulsified asphalt, rubber granules, ceramsite and steel fibers. The invention has good bearing capacity and can effectively control the deformation of surrounding rocks.

Description

technical field [0001] The invention relates to the technical field of tunnel support construction, in particular to a high ground stress soft rock tunnel support structure system and a construction method thereof. Background technique [0002] With the rapid development of my country's transportation industry, there will be more and more deep buried tunnels. One of the special geological problems faced by deep-buried tunnels in mountainous areas of our country is the problem of high ground stress. The large deformation problem caused by tunnel construction in high ground stress soft rock strata has not been effectively solved, which has brought many problems to the design, construction and operation of high ground stress soft rock tunnels, and also brought certain economic losses, some of which will threaten The life safety of construction personnel needs to be paid enough attention. [0003] The following problems still exist in high ground stress soft rock tunnels: the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/15E21D11/18E21D20/02E21D11/10
CPCE21D11/10E21D11/152E21D11/18E21D20/02
Inventor 晁峰郭小红油新华
Owner CHINA STATE CONSTRUCTION ENGINEERING CORPORATION
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