三峡大学学报（自然科学版）2011，Vol.33Issue(3)：23-28,6.
地震动力作用触发的斜坡崩滑响应研究——以青川东河口滑坡为例
Study of Collapsing-Sliding Response of Slope Triggered by Seismic Dynamic Action——Taking Donghekou Landslide for Example
摘要
Abstract
Study of slope response triggered by action of horizontal and vertical seismic acceleration and their time difference seldom appears. Collapsing and sliding response of Donghekou slope in Qingchuan County and its running out process triggered by single and combined action with time difference, regionality and spatial heterogeneity of horizontal and vertical seismic loads generated by P and S seismic waves is simulated by applying UDEC software; and formation mechanism and key controlling factors of slope collapsing and sliding process are confirmed. The result shows that initial collapsing and sliding of the slope is triggered by horizontal tension action caused by P seismic wave from initial focus for the reason that slope damage and full fracture appears within 7 -10s after P seismic wave arriving; but S seismic wave arriving affer 26s because of its lower speed. On the other hand, ejecting and flowing of the broken slope mass is triggered by combined action of P and S seismic waves. In addition, horizontal tension action of P wave is the key controlling factor inducing the slope collapsing and sliding, nevertheless slope topography is the key controlling factor leading to collision, debris flow and accumulation of the slope mass fractured in latter process.关键词
地震纵横波/时差耦合作用/斜坡崩滑响应/离散元数值模拟Key words
P and S seismic waves/ single and combined action with time difference/ collapsing and sliding response of slope/discrete element numerical simulation分类
建筑与水利引用本文复制引用
崔芳鹏,殷跃平,许强,胡瑞林..地震动力作用触发的斜坡崩滑响应研究——以青川东河口滑坡为例[J].三峡大学学报（自然科学版）,2011,33(3):23-28,6.基金项目
中央高校基本科研业务费专项基金(2009QD14) （2009QD14）
地质灾害防治与地质环境保护国家重点实验室(成都理工大学)开放基金(SKLGP2010K004) （成都理工大学）
