长江江源高寒地区气候变化对水文环境的影响研究综述

建基面呈复杂折面阶梯状的重力坝抗滑稳定分析,目前尚没有统一和完善的方法。基于三维刚体极限平衡理论以及条分法,将坝体看作由若干刚性滑动体组成的重力坝,提出了一种抗滑稳定分析方法——三维抗滑稳定条块法,并设计编制了相应的计算程序。采用ANSYS前处理模块的荷载计算方法,以某重力坝7号岸坡坝段为例进行了分析计算,结果表明:不同工况下该重力坝7号岸坡坝段抗滑稳定安全系数均能满足规范要求。该法计算理论较严谨,且与现行规范匹配性好,可供类似工程参考。

Analysis of Climate Change Impact on the Hydrological Environment in the High and Cold Source Region of the Yangtze River

At present there is no common and perfect method for anti-sliding stability analysis of gravity dam with complex multi-zigzag plane base surface. Based on 3-D rigid body limit equilibrium theory and slice method, a method named 3-D anti-sliding stability slice method, which takes the dam body as many sliding rigid bodies, is put forward and the calculation program is developed. Combined with the preprocess module of ANSYS for load calculation, this method is used to analyze the anti-sliding stability of NO.7 bank dam of a hydropower station. The results show that the anti-sliding safety factor of this dam section can reach the requirement of standard. This method has strict computational theory and is easy to use, which can also be used with the current standard with reliable results and can be used for a reference in similar projects.