雅砻江八通滑坡地质特征及风险评价  

Geological characteristic and risk evaluation on Batong landslide of the Yalong River

作　　者：李宗杰[1] 谭跃虎[1] 李二兵[1] 赵辉[1] 

机构地区：[1]解放军理工大学工程兵工程学院,南京210007

出　　处：《矿产勘查》2010年第1期89-94,共6页Mineral Exploration

摘　　要：为准确把握水库运营期间滑坡体的稳定状态,以雅砻江某滑坡为例,详细分析了其基本特征、地质条件及成因机制,分析判断其当前所处状态,得到该滑坡体是原始岩体先倾倒变形后沿倾倒变形岩体与未变形岩体之间的软弱层产生拉裂—蠕滑—沉积固结长期发展的结果。通过工程对比、参数反演和室内土工试验确定计算模型所需参数,根据现场实际调查确定滑坡体剖面,利用Geo-Slope软件建立模型并对该滑坡进行风险评价。针对水库运营及滑坡体实际情况,考虑到蓄水作用和地震动力效应确定了7种工况,并对这7种工况进行计算分析,得到滑坡体在各种工况下的失稳概率。计算结果表明该滑坡整体稳定性较好,只是在地震蓄水工况下失稳概率较大,处于不稳定状态。In order to find out the stability state of the landslide during the water-filling of reservoir, this study takes landslide of Yalong River as an example. Based on field investigation and analysis on geological condition and genesis of the landslide, it is concluded that the landslide is due to the continual development of drawing breakage, slow sliding, depositing and concreting of soft-layer. By engineering contrasting, parameter analyzing, experiment to determine parameters, this study builds the model utilizing Geo-Slope software according to the model used by ascertain section, and then assesses the risk. Considering the reality of the reservoir and the landslide, as well as water effect and earthquake effect, this paper defines and calculates 7 working condition, and then gets the destroy probability in each condition. The results indicate that the landslide is stable except for the condition of earthquake and water-filling.

关 键 词：滑坡 地质特征 稳定性分析 风险评价 

分 类 号：TU413.62[建筑科学—岩土工程]