摘要
Abstract
In Design code for concrete gravity dam ( NB/T 35026-2014) of China, the method for anti-sliding sta-bility with multiple sliding surfaces gives the solution of resistance-action ratio η based on the prerequisite that re-sistance ΔQi of sliding blocks meets internal force equilibrium. However, as the angles between ΔQi and horizontal direction are different, the method in the code is of no physical significance, hence could not really meet the bal-ance of internal force vectors. In this paper, we demonstrates that the theoretical system of the method in the code is not rigorous, which might give rise to wrong result when the values of φi are not equal. In view of this, we opti-mized the method by replacing ΔQi with shear force Qi between blocks, and proposed an iterative solution based on single variable η. Through typical examples and engineering applications, we further verified that the imprecision of the standard method may lead to unacceptable calculation errors; and at the same time, we proved the accuracy and practicability of the proposed method in this paper.关键词
重力坝/多滑面/深层抗滑稳定/迭代求解/刚体极限平衡/优化方法Key words
gravity dam/ multiple sliding surface/ deep slide-resistant stability/ iterative solution/ rigid-body limit equilibrium/ optimization method分类
建筑与水利
