摘要
黄土滑坡是黄土地区一种特殊的地质灾害,随人类活动有加剧趋势。以陕西延安市富县三亩台快速错落式黄土滑坡为研究对象,在现场调查基础上,分析了其形成原因,计算了等效摩擦系数等滑坡滑动相关参数,模拟了该滑坡的活动过程。结果表明:三亩台滑坡属快速错落式黄土滑坡类型,黄土梁陡峻、人工开挖窑洞、黄土含水量增高导致强度降低是引发滑坡的主要因素。比选确定的等效摩擦系数并采用三维滑坡运动模型,模拟三亩台黄土滑坡的运移距离与致灾范围与实际相符,对错落式黄土滑坡的预测与防治有借鉴意义。
The occurrence of loess landslides is exacerbated by human activity in areas dominated by loess. Based on field investigations of the loess landslide at Sanmutai, Yan＇an, Shaanxi Province, we analyzed the mechanisms of formation, and calculated the friction coefficient and other parameters of the landslide material. We used this information to form a model and simulate the landslide. The results showed that the Sanmutai loess landslide was a rapid-collapse event. The primary factors that contributed to the landslide were the steepness of the loess mountain, human excavation into the loess, and increased moisture content leading to a reduction in strength. Results from the 3D model of landslide motion showed a close correlation with the distance that material was displaced in the field. Therefore, this model can be used to predict future loess landslides and to minimize the impacts of such events.
出处
《上海国土资源》
2012年第4期60-63,75,共5页
Shanghai Land & Resources
关键词
地质灾害
黄土滑坡
错落式滑坡
滑动模拟
geological hazard
loess landslide
rapid collapse landslide
sliding movement simulation
