强降雨条件下含倾斜基岩层的边坡稳定分析

Stability analysis of slope with inclined bedrock beneath under intense rainfall

在强降雨入渗条件下,倾斜基岩面显著改变边坡浅部土体内雨水的运移,导致潜在的滑裂面呈折线形发展。通过假定的双折线形滑面和运用不平衡推力法来求解此类边坡的稳定性,建立不同湿润锋深度下边坡的稳定分析模型。研究结果表明:强降雨入渗期间,浅层边坡潜在的滑裂面沿湿润锋和基岩面近似呈双折线形,且模拟结果与本文稳定分析模型计算结果具有较好的一致性。对于此类特殊边坡的强降雨安全预测具有较好的参考价值。

Under intense rainfall, the infiltration process of slope in the shallow area is varied seriously by the inclined bedrock, which causes a development of the sliding surface with folded line shape. The stability of slope was determined based on the hypothetical sliding surface of two-folded line and the imbalance thrust force method, and a stability model of slope with different depths of wetting front was developed. The results show that the potential sliding surfaces develop along the wetting front and the bedrock takes two-folded line shape, and the safety factor also agrees with the results by this model very well. For the safety forecast of this particular slope, the model has a great value as a reference during intense rainfall.