摘要
以甘肃文县哈南村滑坡为研究对象,通过地质勘探和调绘的方法确定滑坡的形态和性质;利用试验确定黄土、滑带土在静力与动力状态下的力学强度参数;采用Geostudio有限元软件建立地质模型,对在天然状态下、降雨饱和状态下、地震状态下、地震与降雨耦合状态下的坡体稳定性进行计算分析。研究表明:哈南村滑坡存在有利滑动的地层岩性、坡体结构和复杂的构造环境,坡体目前稳定性系数大于1,但在降雨与地震耦合的作用下,坡体可能发生次生滑坡和老滑坡复活。
In this paper, the main study object is Hanan Landside, in wenxian county, Gansu Province. The field geological exploration and mapping were used to determine the landslide's shape and property. Then, experiment was used to obtain the strength parameters of loess and slip soil under the static and dynamic conditions. Finally, numerical simulations were conducted using a two-dimensional Geostudio program to establish the geological model and analyze the stability of slope under the natural condition, rainfall saturated condition, earthquake condition and earthquake and rainfall coupling condition. The studies show that: there are easily slip stratum, slope structure and complex geologic structure in Hanan Landslide. The current stability coefficient of the slope is greater than 1. However, under the combined action of rainfall and earthquake, the slope may trigger secondary landslide and prompt old landslide to revive.
作者
赵文辉
王军伟
闫晓龙
许业德
Zhao Wenhui;Wang Junwei;Yan Xiaolong;Xu Yede(Shaanxi Railway Survey Engineering Co. ,Ltd, Shaanxi Xian 710043, China)
出处
《铁道勘察》
2019年第2期72-77,共6页
Railway Investigation and Surveying
关键词
黄土滑坡
稳定性分析
滑坡形成机制
高烈度地震区
Loess landslide
Stability analysis
Formation mechanism of landslide
High intensity seismic region
