坝体稳定性计算中替代重度法适用情形对比分析  

Comparison and analysis on applicable cases of alternative gravity method in dam stability calculation

作　　者：黄海斌 李一平 陆德鸿 苏蛰乐 刘一凡 梁杰 HUANG Haibin;LI Yiping;LU Dehong;SU Zhele;LIU Yifan;LIANG Jie(Sichuan Zhide Geotechnical Engineering Co.,Ltd.,Chengdu 610031,China;Guangxi Yuanhong Engineering Consulting Co.,Ltd.,Nanning 530000,China)

机构地区：[1]四川志德岩土工程有限责任公司,四川成都610031 [2]广西渊虹工程咨询有限公司,广西南宁530000

出　　处：《水利水电快报》2025年第3期102-108,共7页Express Water Resources & Hydropower Information

摘　　要：在稳定渗流作用下,坝体稳定性分析普遍采用的替代重度法存在边界条件限制,但目前对该方法边界条件的研究仍不够充分,在工程应用中计算结果会出现较大偏差。对瑞典条分法两类计算模式中替代重度法和考虑渗透力作用的有效应力法进行了对比,对各计算公式抗滑稳定计算结果进行分析。结果表明:在坝体其他各类参数固定的情况下,随着坝体内平均水力坡降的增大,下游坝体坡比减小;随着下游水位增大,替代重度法的抗滑稳定系数会愈加偏离实际情况。通过大量计算提供了可用于工程参考并兼顾安全性和经济便捷性的土坝稳定性分析中替代重度法适用情形建议。The alternative gravity method commonly used for dam stability analysis under steady seepage flow has boundary condition limitations,but the current research on the boundary conditions of this method was still insufficient,resulting in significant deviations in the calculation results in engineering applications.The alternative gravity method and the effective stress method considering the effect of seepage were compared between the two types of calculation models of Swedish slice method,and the calculation results of anti-sliding stability for each calculation formula were analyzed.The results showed that with other parameters of dam body were fixed,the increase in the average hydraulic gradient within the dam body,the decrease in the downstream slope ratio of the dam body,and the increase in the downstream water level,the anti-sliding stability coefficient calculated by alternative gravity method would deviate further from the actual situation.Through a large number of calculations,the applicable situations of alternative gravity method were provided,enabling the engineering application of the method to take into account both safety and economic convenience.

关 键 词：替代重度法 有效应力法 瑞典条分法 抗滑稳定 渗流计算 

分 类 号：TV64[水利工程—水利水电工程]