矢量和方法在重力坝深层抗滑稳定评价上的应用

Application of Vector Sum Analysis Method in Gravity Dam Stability Evaluation Against Deep Sliding

以向家坝坝基工程为例,采用矢量和方法研究不同滑移面状况下矢量和安全系数的变化趋势,并与刚体极限平衡方法计算结果进行比较。结果表明,矢量和安全系数受滑移面因素影响的变化趋势与刚体极限平衡方法一致,但整体比刚体极限平衡安全系数偏小,最大偏差达9.0%。

In this paper, the safety factors against sliding of Xiangjiaba dam foundation are calculated by rigid body limit equilibrium method and vector sum analysis method （VSM）. And the trends of the safety factors are discussed and compared. Comparing with rigid body limit equilibrium method, the results show that the safety factor by VSM method has the same trend, but the values are overall smaller than that of rigid body limit equilibrium method; the maximum de viation is 9.0%.