施工技术 2015年7月上 64 CONSTRUCTION TECHNOLOGY 第44卷第13期 D0I:10.7672/sgjs2015130064 降雨与地震共同作用下碎石土边坡的稳定性分析* 李晓莲，余云燕2，陈志敏2 (1.天水师范学院，甘肃天水741001；2.兰州交通大学土木工程学院，甘肃兰州730070) [摘要]为研究降雨与地震共同作用条件下碎石土边坡稳定性的影响机制，通过建立楼房山隧道罐子沟端滑坡防 治工程数值计算模型，分别计算并分析了降雨单独作用、地震单独作用及降雨与地震共同作用条件下边坡应力场、 位移场、塑性区及剪应变增量的变化规律，从而得出3种情况下边坡稳定性的破坏机理.研究结果表明，降雨与地 震共同作用下碎石土边坡的稳定性比降雨单独作用或地震单独作用时的稳定性差，更容易发生滑坡、泥石流等地 质灾害. [关键词]边坡；降雨；地震；稳定性；有限元分析 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2015)13-0064-08 Analysis on Gravel Slope Stability During Rainfall and Earthquake Li Xiaolian' Yu Yunyan2.Chen Zhimin2 (1.Tianshui Normal University Tianshui Gansu 741001 China; 2.School of Civil Engineering Lanzhou Jiaotong University Lanhou Gansu 730070 China) Abstract:In order to research the affecting mechanism of gravel soil slope stability under the condition of rainfall alone earthquake alone both rainfall and earthquake this paper established the three- dimensional numerical model of Loufangshan gravel landslide and analyzed the change rule of the stress field displacement field plasticity zone and shear strain increment of slope under the condition of both rainfall and earthquake.The research result shows that the stability of gravel soil slope is decreased greatly under the condition of both rainfall and earthquake and more prone to landslides or debris flow. Key words:slope;rainfall;earthquake;stability;finite element analysis 0引言 主要机理和一般的力学机理.文献[3]通过大型模 在岩土工程领域，大量学者致力于研究降雨或 型试验研究降雨诱发三峡库区碎石土滑坡变形破 地震单一因素对边坡稳定性的影响，如文献[1]通 坏的机理，分析了不同降雨强度、降雨历时及坡度...
降雨与地震共同作用下碎石土边坡的稳定性分析.pdf
