晋西公路黄土洞穴的危害及三维数值分析研究  

A study on hazards of loess caves to highways in west Shanxi Province and three-dimensional finite element numerical modeling

作　　者：李滨[1] 彭建兵[1] 殷跃平[2] 安光明[3] 

机构地区：[1]长安大学地质工程与测绘工程学院,陕西西安710054 [2]中国地质调查局,北京100011 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《中国地质灾害与防治学报》2008年第1期86-90,共5页The Chinese Journal of Geological Hazard and Control

基　　金：国家西部交通建设科技攻关项目(200131881213)

摘　　要：黄土洞穴是晋西黄土高原发育的一种特殊地质灾害。文章在晋西黄土区调查基础上得出,黄土洞穴对公路的危害主要包括对路基路面的破坏、对路堤路堑边坡的破坏及对排水设施的破坏。文章运用三维有限元法分析黄土洞穴在自重环境下对公路路基路面的危害情况及洞穴周围剪应力的变化,得出基于洞穴位置与洞径大小双变量情况下的洞顶临界埋深求解方法,为公路洞穴的有效防治措施提供依据。Loess cave is a kind of special geological hazard in loess plateau of west Shanxi. Research shows the loess caves＇ hazards to highway include damage to roadbed, pavement, cutting slope and embankment slope as well as drainage facilities in west Shanxi. This paper analyses the loess cave＇s damages to roadbed and pavement under gravity condition and the change of shear stress around loess using three-dimensional finite element method. It proposes the method defining the critical thickness of the caves＇ top under the double variant about caves＇ position and diameter conditions. And the effective prevention measures and control methods for researching the loess caves could be gotten.

关 键 词：黄土洞穴 公路危害 有限元法 临界厚度 晋西 

分 类 号：U416.169[交通运输工程—道路与铁道工程] P642.131[天文地球—工程地质学]