一种灰岩顺层公路边坡失稳机理与动态监测分析  

Analysis of stability and sliding mechanism for a typical limestone consequent slope

作　　者：罗祥明 黄伟[2] 童皓安 

机构地区：[1]重庆市秀山县公路局,重庆409900 [2]重庆交通大学土木学院,重庆400074

出　　处：《交通科技与经济》2017年第6期60-64,共5页Technology & Economy in Areas of Communications

基　　金：国家自然科学基金资助项目(50879097)

摘　　要：具有次生红粘土软弱夹层灰岩顺层边坡广泛分布在渝东南地区,此类边坡较一般岩质边坡相比有着比较特殊的地质构造,边坡岩质大多为灰岩成分,岩体结构完整且较坚硬,岩层节理往往呈顺层发育,但在岩层之间存在交错次生红粘土软弱夹层。在进行失稳坡坏特点与机理分析基础上,基于尖点突变理论进行模拟基础上,采取一种将变形参数的监测获取与状态评估相结合的方法对此类边坡进行稳定性分析与预报。该方法在重庆市彭水县沙子口顺层岩质滑坡等案例等多个项目得到初步验证。A limestone consequent slope with secondary red clay interlayer is widely distributed in southeast region in Chongqing,which has a rather special geological structure compared to common rock slopes and is composed mainly by limestone with structural integrity and relatively hard.The joints in rock bedding are often consequently developed,but there is always a weak residual red clay interlayer between rock stratum.Based on analysis of characteristics and mechanism of stability failure of the slopes,this paper applies a catastrophe theory based stability analysis method,and proposes a new method that combines the deformation parameters monitoring with multi-status evaluation.The method is tested in several sites including the Shazikou landslide forcasting in Pengshui County in Chongqing,Southwest of China.

关 键 词：岩质滑坡 软弱夹层 滑动机理 稳定性分析 

分 类 号：U416.14[交通运输工程—道路与铁道工程]