Characteristic analysis of pressure-arch of a double-arch tunnel in water-rich strata evolution

被引：0
|
作者：
Li, C.L. [1 ,2 ]
Wang, S.R. [1 ,3 ]
Zou, Z.S. [3 ]
Liu, X.L. [3 ]
Li, D.Q. [4 ]
机构：
[1] School of Civil Engineering and Mechanics, Yanshan University, Qinhuangdao,066004, China
[2] Institute of Urban Construction, Hebei Normal University of Science and Technology, Qinhuangdao,066004, China
[3] Opening Project of Key Laboratory of Deep Mine Construction, Henan Polytechnic University, Jiaozuo,454003, China
[4] School of Mining Engineering, University of New South Wales, NSW,2502, Australia
来源：
Journal of Engineering Science and Technology Review | 2016年 / 9卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Tunnels - Arches - Excavation - Pressure effects;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
It is of importance to analyze the morphological characterization, the evolution process and the skewed effect of pressure-arch of a double-arch tunnel in the water-rich strata. Taking a buried depth 80 m double-arch tunnel as an example, a computational model of the double-arch tunnel was built by using FLAC3D technique. Then considering some aspects including groundwater conditions, tunnel depth, construction sequences and permeability coefficients, the coupling effect of stress field and seepage field in the pressure-arch of the double-arch tunnel was analyzed. The results show that the thickness of the pressure-arch induced by step-by-step excavation and display a step-descent skewed distribution from the left to the right of the double-arch tunnel. The permeability coefficient has a significant influence on the shape and the skewed effect of the pressure arch. The excavation of the bench method has a better arching condition than that of the expanding method. The abtained results provide a basic reference for the rock reinforcement design and safety construction of double-arch tunnels in the water-rich strata. © 2016 Eastern Macedonia and Thrace Institute of Technology. All rights reserved.
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页码：44 / 51
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