雨型对残积土边坡稳定可靠性的影响研究  

Disaster Risk Assessment of Different Rain-Type Land Slide in Fujian Province

作　　者：沈秋池[1] 苏燕[2] SHEN Qiu-chi;SU Yan(Engineering Department,Fuzhou University of International Studies and Trade,Fuzhou,Fujian 350202,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州外语外贸学院工程系,福建福州350202 [2]福州大学土木工程学院,福建福州350108

出　　处：《佳木斯大学学报（自然科学版）》2018年第2期201-205,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：福建省自然科学基金(2014J01186)

摘　　要：基于福建省独特的地理气候特点,依据饱和-非饱和土渗流理论和流固耦合理论,采用有限元数值仿真方法研究持续性强降雨和台风降雨条件下残积土层滑坡灾害的形成机理,分析非恒定渗流对边坡力学特性的影响,结合刚体极限平衡理论和可靠度分析理论,采用蒙特卡罗法,选取失效概率作为危险性评价标准,进行边坡稳定性分析。结果表明:降雨总量相同条件下,台风降雨入渗深度浅,饱和程度高,破坏时间早且多为浅层滑坡;持续性强降雨则相反。Based on the characteristics of unique geography and climate of Fujian province,according to the saturated-unsaturated soil seepage theory and the fluid-structure interaction theory,the finite element numerical simulation method under the condition of continuous heavy rain and typhoon rainfall residual soil landslide disaster formation mechanism,analyzed the influence of unsteady seepage mechanics characteristics of the slopes,the combination of rigid body limit equilibrium theory and the theory of reliability analysis using Monte Carlo method,selecting failure probability as a risk assessment standards to analyze the slope stability.While the results show that,when the rainfall amount is under the same conditions,the depth of typhoon rainfall infiltration is shallow,saturation degree is high,the shallow landslide destruction is earlier and most are superficial landslides,the persistent heavy rainfall is the opposite.

关 键 词：雨型 饱和-非饱和土渗流理论 非恒定渗流 蒙特卡罗法 失效概率 滑坡 

分 类 号：TU462[建筑科学—结构工程]