Study on Safety Degree of Primary Support Structure of Tunnel in Sandy Rock Mass on LanzhouChongqing Highspeed Railway

doi:10.3973/j.issn.1672-741X.2013.02.008

Tunnel Construction ›› 2013, Vol. 33 ›› Issue (2): 135-141.DOI: 10.3973/j.issn.1672-741X.2013.02.008

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Study on Safety Degree of Primary Support Structure of Tunnel in Sandy Rock Mass on LanzhouChongqing Highspeed Railway

ZHU Dehua¹，LIANG Bin¹，YU Shaohui²，YANG Chaoshuai^2

(1. College of Planning and Architectural Engineering, Henan University of Science and Technology, Luoyang 471003, Henan, China; 2. Technology Center of China Railway Tunnel Group Co., Ltd., Luoyang 471009, Henan, China)

Received:2012-10-19 Revised:2012-12-10 Online:2013-02-20 Published:2013-03-05

Abstract

Abstract:

In the construction of a tunnel in sandy rock mass on LanzhouChongqing highspeed railway, advance reinforcement is made by means of horizontal jet grouting. The distribution of the pressure of the sandy rock mass and the loading characteristics of the primary support structure are analyzed by means of finite element numerical simulation and on basis of the monitoring data of the rock mass pressure and steel arch stress. The study results show that the safety degree of the primary support structure of the tunnel prereinforced by horizontal jet grouting can meet relevant requirements and has some margin. The paper can provide theoretical reference for the optimization design and construction of tunnels in sandy rock mass in the future.

Key words: LanzhouChongqing highspeed railway, sandy rock mass, monitoring, numerical simulation, horizontal jet grouting, primary support

ZHU Dehua，LIANG Bin，YU Shaohui，YANG Chaoshuai. Study on Safety Degree of Primary Support Structure of Tunnel in Sandy Rock Mass on LanzhouChongqing Highspeed Railway[J]. Tunnel Construction, 2013, 33(2): 135-141.

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Study on Safety Degree of Primary Support Structure of Tunnel in Sandy Rock Mass on LanzhouChongqing Highspeed Railway

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