中南大学学报（自然科学版）2013，Vol.44Issue(4)：1634-1638,5.
几何参数和强度参数对边坡三维稳定性的影响
Effect of geometry parameters and strength parameters to three-dimensional stability of slope
摘要
Abstract
The three-dimensional numerical model of slope was founded by FLAC3D software, changing the ratio of width to height WIH, slope angle, friction angle and cohesion of geotechnical material to calculate the factor of safety of slope by the strength reduction method. The results show that with the increase of WIH, the factor of safety of slope decreases obviously to a constant value. If W/H>6, the slope problem can be simplified to plane strain problem. With the decrease of the ratio of width to height, the three-dimensional effect of slope is more obvious, if W/H<3, the three-dimensional effect of slope cannot be neglected. Under the same WIH, the differences between three-dimensional results and two-dimensional results are larger with lower slope angle, indicating the more obvious three-dimensional effect of slope. With the increase of friction angle, the three-dimensional effect of slope gradually becomes smaller, and the failure mode of slope changes from deep slipping to shallow slipping. With the increase of cohesion, the three-dimensional effect of slope becomes more obvious, and the failure mode of slope changes from shallow slipping mode to the deep slipping mode, inclination of slip suface becomes slower.关键词
边坡/稳定性/安全系数/滑动面/三维效应/宽高比Key words
slope/ stability/ factor of safety/ slip surface/ three-dimensional effect/ ratio of width to height分类
建筑与水利引用本文复制引用
宋维胜,李江腾..几何参数和强度参数对边坡三维稳定性的影响[J].中南大学学报（自然科学版）,2013,44(4):1634-1638,5.基金项目
国家自然科学基金资助项目(51274097) （51274097）
湖南省水利厅科技项目(2010) （2010）
