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针对重力坝深层抗滑稳定双斜面法存在的不足,探讨了重力坝深层抗滑稳定的三斜面法,将坝趾处分界面的倾角及其上抗力方向角作为未知量,在三个倾斜滑裂面上建立等安全系数法极限平衡方程,根据抗滑稳定安全系数极值条件,通过迭代和双重搜索试算求解最小的安全系数和最危险的滑裂面形态。计算结果表明,三斜面法更贴近实际工程的客观条件,比双斜面法更合理可靠、更具有普遍适用性。
Aiming at the shortcomings of the deep anti-sliding stability double bevel method in gravity dam, this paper discusses the three-bevel method of deep anti-sliding stability of gravity dam. By taking the dip angle and the upper anti-slip angle of the dam as the unknown quantity, According to the extreme conditions of anti-sliding stability safety factor, the minimum safety factor and the most dangerous slip surface morphology are solved through iteration and double search trial calculation. The calculation results show that the three-slope method is closer to the objective conditions of the actual project, more reasonable and reliable than the double-slope method, and more universal applicability.