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High ground stress soft rock tunnel supporting structure system and construction method thereof

A high ground stress and support structure technology, applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of easy damage to the secondary lining structure, damage to the support structure, failure of anchor rods, etc., to simplify the construction process and improve the bearing capacity capacity, high load-carrying effect

Active Publication Date: 2020-08-25
CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • High ground stress soft rock tunnel supporting structure system and construction method thereof
  • High ground stress soft rock tunnel supporting structure system and construction method thereof
  • High ground stress soft rock tunnel supporting structure system and construction method thereof

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Embodiment Construction

[0051] like Figure 1 to Figure 5 As shown, the high ground stress soft rock tunnel support structure system of the present invention includes the initial pressure yield support, pressure energy storage layer 5 and permanent support structure 6. 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 yield anchor 4; the two sides of the yield energy storage layer 5 are respectively close to the inner side of the yield 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 is 0.5-1.5m. The single steel frame is a truss structure with a rectangular longitudinal section. The height of the longitudinal section is 20...

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Abstract

The invention relates to the technical field of tunnel supporting construction, and discloses a high ground stress soft rock tunnel supporting structure system and a construction method thereof. The high ground stress soft rock tunnel supporting structure system comprises a yielding primary support, a yielding energy storage layer and a permanent support structure; the yielding primary support comprises a grid steel frame attached to a tunnel surrounding rock and sprayed concrete, and a yielding anchor rod is arranged on the side, close to the tunnel surrounding rock, of the outer side of thegrid steel frame; the two sides of the yielding energy storage layer are tightly attached to the inner side of the yielding primary support and the outer side of the permanent support structure respectively; the yielding energy storage layer is of a cast-in-place structure capable of generating 10cm-15 cm yielding deformation and comprises cement, emulsified asphalt, rubber particles, ceramsite and steel fibers. According to the high ground stress soft rock tunnel supporting structure system and the construction method thereof, the bearing capacity is good, and surrounding rock deformation canbe effectively controlled.

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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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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