岩溶区土洞地基稳定性分析  

Stability analysis of soil cave foundation in karst area

作　　者：刘之葵[1] 梁金城[1] 朱寿增[2] 谭景和[2] 

机构地区：[1]中南大学资源环境与建筑工程学院,长沙410083 [2]桂林工学院,桂林541004

出　　处：《水文地质工程地质》2003年第3期24-28,共5页Hydrogeology & Engineering Geology

摘　　要：地下水产生的潜蚀作用和崩解作用,对地基中土洞发育乃至破坏失稳有重要的影响。根据弹性理论及相关分析,可以获得地基中土洞周边土体的应力状态,再利用莫尔-库仑屈服准则,对其进行安全稳定性判别。结合工程实例计算,发现地下水位变化将导致土洞周边土体应力状态发生明显改变,并有可能导致土洞地基破坏失稳。The water creep and disintegration caused by groundwater have important influence on the formation and damage of soil cave. Based on elastic theory and relative analysis, the stress distribution of soil cave in foundation can be deduced, and the stability of soil cave can be determined by the Mohr-Coulomb yield criteria. With the calculation of engineering cases, this paper point out that the variation of groundwater level will caused marked change of stress distribution in the round of soil cave, and the soil cave foundation probably will be also damaged.

关 键 词：岩溶区 土洞 地基稳定性分析 地下水 潜蚀作用 崩解作用 次生应力 莫尔-库仑屈服准则 

分 类 号：P642.25[天文地球—工程地质学]