黄土隧道台阶法施工地表裂缝规律模拟分析研究  

Simulation Analysis on Surface Crack Law in Loess Tunnel Construction with Step-Method

作　　者：曹勇[1] 朱永全[1] 刘勇[1] 

机构地区：[1]石家庄铁道学院土木工程分院,河北石家庄050043

出　　处：《石家庄铁道学院学报》2008年第2期20-23,27,共5页Journal of Shijiazhuang Railway Institute

摘　　要：针对郑-西客运专线铁路黄土隧道施工过程中广泛出现的地表裂缝现象,采用三维离散元计算程序3DEC进行了裂缝开展的数值模拟。考虑黄土原始垂直节理,台阶法施工,分三种隧道覆土埋深工况进行了讨论,分析得出了在各埋深工况条件下地表裂缝的开展规律。The surface crack problem is extensive when the loess tunnels are constructed along Zhengzhou- Xian Railway. This paper uses the there-dimensional distinct element code of 3DEC to carry out the numerical simulation on crack development. Considering the initial loess vertical joints and three kinds of depth of the underground tunnel constructed with step-method, this paper discusses the three conditions and finds the law of crack development.

关 键 词：黄土隧道 原始垂直节理 地表裂缝 离散元 台阶法 

分 类 号：TU444[建筑科学—岩土工程]