二密滑坡形成机制  

Formation Mechanism of Ermi Landslide

作　　者：徐黎明[1] 王清[1] 陈剑平[1] 栾海[2] 周福军[1] 

机构地区：[1]吉林大学建设工程学院,长春130026 [2]吉林省公路勘测设计院,长春130021

出　　处：《吉林大学学报（地球科学版）》2012年第4期1104-1111,共8页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40872170;40472136);高等学校博士学科点专项科研基金项目(20090061110054)

摘　　要：二密滑坡原是稳定的古滑坡体。由于不合理的人为开挖路基、降雨和地下水等因素,诱使古滑坡体重新滑动,影响高速公路的正常施工和人们的安全。通过现场调查、钻探、物探等勘察手段,查明了滑坡区的地形地貌、地层岩性和物质结构;根据所得地质资料确定了滑动面所在位置,计算其稳定性,重点分析该滑坡的形成机制。经过数值分析得出,在古滑坡体下部开挖路基是此滑坡形成的主要原因。目前此滑坡处于挤压—初滑阶段,需及时采取有效的综合措施进行治理。Ermi landslide was a stable ancient slide. The ancient slide start to slide because of the effect of artificial road excavation, precipitation and ground water, which influence regular constructing of the expressway and safety of human life seriously. The topography and rock mass in the area of the landslide are ascertained by the means of field investigation, drilling, geophysical exploration and so on. The location of the slide plane is determined, and the stability of the landslide is calculated. Moreover, the formation mechanism of the landslide is studied. By numerical analysis, It is found that road excavation in the tail of the ancient landslide is main cause of the landslide. It is in the extrusion-primary creep stage. It must be treated by the means of supporting, draining and so on.

关 键 词：滑坡 古滑坡 形成机制 数值分析 

分 类 号：P642.22[天文地球—工程地质学]