摘要
为了研究洪水作用过程中河流两岸滑坡复活,用极限分析理论建立洪水作用下曲线形滑面滑坡复活模型,研究洪水作用过程中洪水位、冲刷量、地下水位等参数对滑坡稳定性影响情况。结果发现:随着地表水升高稳定性系数升高,随着地下水位升高滑坡稳定系数降低,滑坡在地下水与土体内摩擦角折减双重作用下,在内摩擦角15°~25°范围内有一个复活破坏过程;随着冲刷深度增加稳定性系数降低,随着边坡高度增加,冲刷深度对稳定性系数影响减小;相对于其他参数,冲刷深度与内摩擦角对稳定性系数影响大。
Based on the limit analysis theory,a landslide model of the curved surface under the action of flood was established,and the effect of flood water level,groundwater level,erosion quantity and other parameters effect on landslide stability was studied. It was found that with the increase of surface water level thr stability coefficient of the landside increased,and with the rise of groundwater level the stability coefficient of landslide reduced. Under the double action of landslide groundwater and internal friction angle of soil,internal friction angle between 15 ° and 25°,the landslide had a failure process. As the scour depth increasing,the stability coefficient decreased. As the slope increasing,the influence of depth of scour on the stability coefficient reduced. Compared with other parameters,scour depth and angle of internal friction had a great influence on coefficient of stability.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
北大核心
2013年第S2期90-95,共6页
Journal of Sichuan University (Engineering Science Edition)
基金
中交股份科技研发项目(2011-zjkj-094)
国家自然科学基金资助项目(51068006)
关键词
洪水
极限分析
稳定性
上限定理
flood
limit analysis
upper bound theorem
stability of landslide
