Tunnel lining thickness-lack reinforcing structure and construction method

A construction method and lining technology, which is applied in the direction of tunnel lining, tunnel lining, shaft lining, etc., can solve problems such as tunnel lining thickness, and achieve the effects of saving maintenance investment, ensuring safety, and quickly replacing lining

Pending Publication Date: 2019-02-22
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a tunnel lining underthick reinforcement structure and construction method, provide a s

Method used

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  • Tunnel lining thickness-lack reinforcing structure and construction method
  • Tunnel lining thickness-lack reinforcing structure and construction method
  • Tunnel lining thickness-lack reinforcing structure and construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Such as Figure 1-Figure 3 As shown, a tunnel lining underthick reinforcement structure includes newly-built secondary lining 3 and newly-built primary support 4 in the underthick area of ​​tunnel lining.

[0034] The newly-built initial support 4 is connected with the existing initial support 2, and several mortar anchors 7 are arranged at the junction of the newly-built initial support 4 and the existing initial support 2, through which the mortar anchor 7 to enhance the stability of the connection.

[0035] The newly-built secondary lining 3 and the existing secondary lining 1 are connected by several brazing nails 6, and the brazing nails 6 are connected on the connection surface between the newly-built secondary lining 3 and the existing secondary lining 1 Longitudinal and transverse intervals are arranged, and a planting glue 8 is provided at each of the brazing nails 6 . Specifically, holes are drilled on the existing secondary lining 1 , brazing nails 6 are im...

Embodiment 2

[0039] A construction method for underthickness reinforcement structure of tunnel lining, comprising the following steps:

[0040] Step 1: Before replacing the under-thick section of the lining, the defect rectification of the adjacent section should be completed first, and temporary steel frame supports 14 are installed at the under-thick section of the tunnel lining and on both sides, and the temporary steel frame supports 14 are arranged at longitudinal intervals;

[0041] Step 2: Use grouting steel flower pipes 12 to reinforce the surrounding rock in the area where the tunnel lining is not thick enough, and the grouting steel flower pipes 12 are arranged at plum blossom-shaped intervals in the replacement section;

[0042] Step 3: Dismantling several replacement sections 13 in the under-thick area of ​​the tunnel lining at intervals, erecting permanent steel frame support 15 in the replacement section 13, and spraying concrete to form new primary support 4, such as Figure...

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Abstract

The invention discloses a tunnel lining thickness-lack reinforcing structure and a construction method. The reinforcing structure comprises a newly constructed secondary lining and a newly constructedpreliminary support arranged on a tunnel lining thickness-lack area, multiple mortar anchor rods, and multiple grouting steel flower pipes arranged in the tunnel lining thickness-lack area, wherein the newly constructed secondary lining is connected with an existed secondary lining; the newly constructed preliminary support is connected with an existed preliminary support; and the multiple mortaranchor rods are arranged on the connecting part of the newly constructed preliminary support and the existed preliminary support. The construction method comprises the steps of arranging a temporarysteel frame support; adopting the grouting steel flower pipes for reinforcing a surrounding rock; disassembling a disassembling and replacing section of the tunnel lining thickness-lack area, erectinga permanent steel frame support on the disassembling and replacing section, spraying concrete, and forming the newly constructed preliminary support; and driving the mortar anchor rods, constructingdrill nails and a water stop adhesive on the connecting surface of the newly constructed secondary lining and the existed secondary lining, paving a lining waterproof layer between the newly constructed secondary lining and the newly constructed preliminary support, then modelling, and pouring the newly constructed secondary lining.

Description

technical field [0001] The invention relates to the technical field of railway engineering construction, in particular to a tunnel lining underthick reinforcement structure and a construction method. Background technique [0002] my country's railway construction has a long history. As of 2016, my country's railway operating mileage reached 124,000 kilometers, of which high-speed rail operating mileage exceeded 22,000 kilometers. However, with the increase in operation time, a large number of tunnels began to suffer from diseases, such as water leakage, lining cracks, linings that were not thick enough, and the back of the lining was empty or not dense, etc., posing great safety hazards. Especially in the tunnels built before the 1980s and 1990s, the disease is more serious, and it is urgent to solve and deal with the tunnel disease problem. The disease of under-thickness of lining is the most dangerous disease. Under-thickness of lining indicates that the thickness of the ...

Claims

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Application Information

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IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/003E21D11/10
Inventor 舒东利朱麟晨廖余王磊余大龙杨建民康芮周林峰张涵
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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