强降雨条件下浅层滑坡失稳的尖点突变机理  

Cusp-catastrophic instability mechanism about shallow landslide under intensive rainfall

作　　者：郑重[1,2] 赵云胜[1] 刘能铸 张卫中[2] 

机构地区：[1]中国地质大学工程学院,湖北武汉430023 [2]中南财经政法大学信息与安全工程学院,湖北武汉430074 [3]云南明仁煤矿检测技术有限公司,云南昆明650224

出　　处：《湖南科技大学学报（自然科学版）》2012年第1期63-67,共5页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金资助项目(51104176)

摘　　要：采用统计学的分析方法定量分析和归纳总结了浅层堆积物滑坡演化过程中坡体位移和降雨量之间的幂函数分布关系;结合向家坡滑坡工程实例,考虑浅层滑坡坡体位移与降雨量关系以及降雨对滑坡滑面介质的应变软化和水致弱化影响,采用非线性科学的有关理论,建立了强降雨条件下向家坡浅层滑坡失稳的尖点突变模型,并利用该模型分析了向家坡滑坡强降雨条件下浅层滑坡失稳的破坏机理.The power function distribution relationship between slope-mass slide displacement and rainfall of shallow loose deposits landslide was analyzed and concluded quantitatively by means of mathematic statistics;Based on the engineering example of xiangjiapo landslide,the relationship between displacement and rainfall and was considered and the effects of rainfall to strain softening and water weakening about slip surface medium were researched,the cusp-catastrophic model of shallow landslide was established by using of nonlinear science catastrophe theory,and be used to reveal the sudden instability and failure mechanism of xiangjiapo landslide due to intensive rainfall.

关 键 词：浅层滑坡 稳定性 尖点突变 强降雨 失稳 机理 

分 类 号：TU459[建筑科学—岩土工程]