摘要
针对三峡库区柏堡滑坡,选取滑带土的粘聚力c和内摩擦角φ、滑坡体重度γ等作为影响因素进行正交试验,并对试验结果进行极差分析以及显著性试验.从分析结果可知,滑带土内摩擦角、降雨量是滑坡稳定性最为敏感因素;结合敏感性分析对滑坡发生滑动的诱发因素进行推断:降雨是引起滑坡的主要原因,持续多日的降雨以及日降雨量的突然涨幅加快了滑坡体上的雨水入渗,降低了滑带土的抗剪强度,从而引起滑坡的稳定性降低;滑坡的稳定性对库水位不敏感,库水位的变动对滑坡的稳定性有一定的影响但有限.
Aiming at the Baibao landslide in the three Gorges reservoir area,the cohesion c of the sliding zone soil,the angle of internal frictionφand the unit weightγof the landslide body are selected as the influencing factors,and the orthogonal test is carried out.The range analysis and significance tests are carried out based on the test results.From the analysis results,it can be seen that the friction angleφand rainfall in the sliding zone soil are the most sensitive factors for the stability of the landslide,and combined with the sensitivity analysis,it is inferred that rainfall is the main cause of the landslide sliding.The continuous rainfall for many days and the sudden increase of daily rainfall accelerate the infiltration of rain water on the landslide and reduce the shear strength of the sliding zone soil,thus reducing the stability of the landslide.The stability of the landslide is not sensitive to the reservoir water level.and has a certain influence on,but the influence of the change of the reservoir water level on landslide stability is limited.
作者
陈源
易庆林
刘艺梁
曾怀恩
周宝
CHEN Yuan;YI QingLin;LIU Yiliang;ZENG Huaien;ZHOU Bao(Key Laboratory of Geological Hazards on Three Gorges Reservoir Area Ministry of Education,China Three Gorges Univ.,Yichang 443002,China;Institute of Geo-hazard Prevention&Mitigation,China Three Gorges Univ.,Yichang 443002,China;Hubei Key Laboratory of Construction&Management in Hydropower Engineering,China Three Gorges Univ.,Yichang 443002,China;Hubei Key Laboratory of Intelligent Vision Based Monitoring for Hydroelectric Engineering,China Three Gorges Univ.,Yichang 443002,China)
出处
《三峡大学学报（自然科学版）》
CAS
北大核心
2020年第3期40-44,共5页
Journal of China Three Gorges University：Natural Sciences
基金
国家自然科学基金项目(41807294)
湖北长江三峡滑坡国家野外科学观测研究站开放基金项目(2018KTL14)
湖北省自然科学基金项目(2016CFB443)
水电工程智能视觉监测湖北省重点实验室开放基金项目(2015KLA06)
精密工程与工业测量国家测绘地理信息局重点实验室开放基金项目(PF2015-14)
湖北省水电工程施工与管理重点实验室(三峡大学)开放基金项目(2014KSD13)。
关键词
正交试验设计
降雨
滑坡稳定性
柏堡滑坡
orthogonal design
rainfall
landslide stability
Baibao landslide
