基于灰色关联度的降雨与库水耦合边坡稳定性影响因素敏感性分析  

Sensitivity analysis of the influencing factors on slope stability under the coupling effect of rainfall and reservoir water based on grey correlation theory

作　　者：陈海林 郭璐 贺可强[1] 郝永恒 CHEN Hailin;GUO Lu;HE Keqiang;HAO Yongheng(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China;CCCC Fourth Highway Engineering Co.Ltd.,Beijing 100022,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525 [2]中交第四公路工程局有限公司,北京100022

出　　处：《青岛理工大学学报》2023年第4期28-36,共9页Journal of Qingdao University of Technology

基　　金：山东省自然科学基金重点项目(ZR2020KE004);自然资源部滨海城市地下空间地质安全重点实验室开放基金项目(BHKF2021Y05);三峡库区地质灾害教育部重点实验室(三峡大学)开放基金项目(2017KDZ03)。

摘　　要：雨水和库水长期反复渗入和排出会对滑坡产生严重的影响。为了进一步研究库水与降雨耦合动力作用下的边坡稳定性变化规律,以三峡库区八字门滑坡为研究对象,将降雨强度、库水下降速率作为影响滑坡稳定性的主要外部动力诱发因素,将滑体黏聚力、内摩擦角、重度及渗透系数作为内部主控因素,通过灰色关联度理论分析上述因素对降雨与库水耦合滑坡稳定性的影响,确定滑坡岩土体材料内部影响因素及外部水动力强度因素对滑坡稳定的控制作用大小。结果表明,降雨强度的变化对降雨与库水耦合边坡稳定性的影响最敏感,且在不同库水位条件下,库水下降速率与渗透系数对边坡稳定性的敏感程度不同。研究成果可为水库型边坡的防护治理和设计提供重要参考。Long-term repeated infiltration and discharge of rainwater and reservoir water will have a serious impact on landslides.Taking the Bazimen landslide in the Three Gorges Reservoir Region as the research object,this study aims to investigate the change law of slope stability under the coupling effect of reservoir water and rainfall.Guided by the grey correlation theory,and taking rainfall intensity and the decline rate of reservoir water level as the main external factors,the cohesion,internal friction angle,weight and permeability coefficient as the main internal control factors,this study analyzes the influence of the above factors on the slope stability under the coupling effect of rainfall and reservoir water,and determines the controlling effect of the internal factors and external hydrodynamic strength factors on the slope stability.The results show that the slope stability under the coupling effect of rainfall and reservoir water is most sensitive to the variation of rainfall intensity,and the sensitivity of slope stability to the reservoir water decline rate and the permeability coefficient is different under different reservoir water level conditions.The research results can provide important reference for reservoir slope protection design.

关 键 词：降雨与库水耦合边坡 稳定性分析 灰色关联度理论 诱发因素 

分 类 号：TU42[建筑科学—岩土工程]