土坡失稳破坏机理浅析

The Mechanism Analysis of Slope Failure

通过改写的边坡稳定分析程序,对单个特定圆弧,分析土坡坡度、上下游水位及圆弧中心角等多种因素变化时,对边坡下方部分土体滑动安全系数变化的影响。研究结果表明,存在安全系数局部小于整体的情况,并且当坡度越陡时,边坡更容易出现坡脚处土体首先滑动而非整体失稳破坏。同时,在土坡稳定分析条分法计算过程中,考虑采用反向递推模式进行土条累加计算更为合理。

By changing the slope stability analysis program, it is analyzed for a single particular arc that when the factors including angle of the earth slope, top and bottom water level, arc center angle changed, how soil safety coefficient for the parts of the soil underneath of the earth slope change. The conclusion is the part of the safety coefficient is less than the whole safety coefficient, and when the slope is steeper and the level of underground water is higher. It will be found that the soil of bottom of the slope will be first to glide but not the whole slope broke. Simultaneously, in the calculation process of slice method, it is more reasonable to take the reverse recursive model to calculate the cumulative calculation of the soil.