溪洛渡电站左岸谷肩堆积体（IV区）稳定性评价

在研究了溪洛渡水电站左岸谷肩堆积体物质组成和结构的基础上,结合施工过程中的变形监测信息,对目前变形明显的IV区边坡应用失稳模式进行了分析。我们选取了两条具代表性的剖面,采用极限平衡方法,在天然和地震两种工况下对边坡的稳定性系数进行了计算,然后以计算结果为依据对其稳定性进行评价。结果显示:自然坡体在两种计算工况下皆处于稳定状态,并具有较高的安全储备,开挖后坡体仍然具有一定的稳定性,但从满足工程边坡安全度的要求出发,对边坡进行及时支护是必要的。

Stability appraising of the left bank accumulation (IV region) of Xiluodu Reservoir

Based on the investigation of the composition and the geological structure of the left bank accumulation of Xiluodu Reservoir and combined with the monitoring information data in the construction process,we analyze the slip mode of the accumulation(IV region) which shows obvious deformation at present.We select two representative excavated sections and use the limit equilibrium method under the natural and earthquake work conditions to calculate the stable factors.Then we carry through the stability appraising according to the calculation results.Our calculation results show that the natural slope is in the steady state under two kinds of work conditions and it has more high safety margin,and the excavated slope of the reservoir has certain stability too.However,with a view of satisfying the security request of the project slope,it is necessary to support the slope timely.