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Composite lining structure for super-large-span pile-foundation-joist-based bearing arched tunnel and construction method thereof

A composite lining and span technology, which is applied in tunnel lining, foundation structure engineering, tunnels, etc., can solve problems such as arch structure settlement, lining cracking, arch foot displacement is difficult to control, etc., to eliminate the risk of landslides, improve the safety of dismantling and bracing and Flexibility, the effect of reducing the amount of excavation

Inactive Publication Date: 2016-10-26
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite lining structure of super-long-span pile-based joist bearing arched tunnels. The problem of lining cracking caused by excessive settlement of the arch structure to ensure the stability and safety of tunnel construction and operation

Method used

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  • Composite lining structure for super-large-span pile-foundation-joist-based bearing arched tunnel and construction method thereof
  • Composite lining structure for super-large-span pile-foundation-joist-based bearing arched tunnel and construction method thereof
  • Composite lining structure for super-large-span pile-foundation-joist-based bearing arched tunnel and construction method thereof

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Embodiment Construction

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] refer to figure 1 , a super-large-span pile foundation joist bearing arch tunnel composite lining structure of the present invention includes an advanced support structure, an initial support structure and a secondary lining structure arranged from inside to outside. The secondary lining structure includes an arch secondary lining structure 7 and an upward secondary lining structure 9, and the primary support structure includes an arch primary support structure 20, a left side wall primary support structure 21a, a right The primary support structure 21b of the side wall and the primary support structure 22 of the inverted arch; The side arch feet are supported on and connected to the right joist 6b; the left pile foundation 5a and the right pile foundation 5b are respectively arranged at intervals along the tunnel extension direction under the...

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Abstract

The invention provides a composite lining structure for a super-large-span pile-foundation-joist-based bearing arched tunnel and a construction method thereof. With the structure, the force-bearing state is clear and construction becomes convenient; and a problem of lining cracking caused by excessive arched structure sedimentation because of difficult control of super-large-span tunnel arch springing displacement on the complicated geological condition can be solved, so that stability and security of tunnel construction and operation can be guaranteed. The structure comprises a forepoling structure, a preliminary bracing structure, and a secondary bracing structure that are arranged from inside to outside. Left-side arch springs of the preliminary bracing structure and the secondary bracing structure are supported on a left-side joist and are connected with the left-side joist and right-side arch springs of the preliminary bracing structure and the secondary bracing structure are supported on a right-side joist and are connected with the right-side joist. A left-side pile foundation and a right-side pile foundation are arranged at an interval under the left-side joist and the right-side joist along an extending direction of the tunnel; and the upper ends of the left-side pile foundation and the right-side pile foundation are fixedly connected with the left-side joist and the right-side joist and the lower ends are arranged in a stable rock and soil strata of a foundation.

Description

technical field [0001] The invention relates to tunnel excavation and support, in particular to a super-large-span pile foundation joist bearing arched tunnel composite lining structure and a construction method thereof, which is suitable for super-long-span tunnels, especially for complex geological conditions with large overlying loads and strata Ultra-long-span tunnels with strict settlement control. Background technique [0002] After entering the 21st century, my country's railway construction has developed rapidly. With the rapid and large-scale construction of high-speed railways in the southwest mountainous areas, due to the constraints of various factors such as large curve radius, complex terrain and geological conditions, and high environmental protection requirements, some sections along the railway line have been designed. The station conditions are extremely difficult. Therefore, in order to improve the freedom of route selection and station setting for high-sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E02D29/045
CPCE21D11/003E02D29/045
Inventor 卿伟宸朱勇林本涛高杨陶伟明郑伟黄华张慧琳张磊王若晨郑尚峰曾琦曾宏飞孟祥磊
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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