重力坝的稳定是靠坝体自身重量来维持的。传统的计算方法不论是纯摩公式还是剪摩公式,都是基于极限平衡条件,取单一的安全系数来推算在给定的滑动力条件下,所需要的总抗滑力,从而确定大坝的经济断面。然而,岩基参数的可变性、上部荷载的不恒定性以及各种物理量的不同权重等,计算中都未充分考虑。尽管计算结果总的安全系数达到要求,但很 The stability of gravity dam is maintained by its own weight. Traditional methods of calculation, whether pure or shear friction formula, are based on the limit equilibrium conditions, taking a single factor of safety to calculate the total sliding force required in a given sliding force, to determine the dam Economic section. However, the variability of rock-based parameters, the instability of the upper loads and the different weights of various physical quantities are not fully considered in the calculation. Although the calculation of the total safety factor to meet the requirements, but very