渗流作用下边坡自稳临界高度计算

Determining the Self-stability Critical Height of Slope with Steady Seepage

大多边坡中存在地下水,渗流是影响边坡稳定性的关键因素之一。由经典的土力学理论,在存在地表超载和地下水渗流情况下,推导出了计算岩土体自稳临界高度的一系列公式,扩展了经典的计算公式应用范围,证明了地下水渗流不改变边坡潜在滑动面的位置但减少了岩土体自稳临界高度。研究成果可用于自然边坡、填土边坡、堤坝边坡、已知滑动面的滑坡、基坑开挖边坡的稳定性评价。

Most of slopes involve groundwater, and seepage is one of the key factors of slope stability. A series of e- quations deduced based on classical soil mechanics theory are presented to determine the slope＇ s self-stability criti- cal height in consideration of surcharge and steady groundwater seepage. The application of the classical theory is thus extended. Groundwater seepage is found out not to change the locations of potential slip surfaces but to de- crease the self-stability critical height of slopes. The equations presented in this research are suitable to calculate the critical height for natural slopes, fill slopes, embankment slopes, slippage slopes with known slip locations, ex- cavation slopes and so on.