考虑土工复合材料衬垫系统的尾矿库稳定性分析  

Stability analysis of tailings dam considering geocomposite liner system

作　　者：吴焕新[1] 张峰 WU Huanxin;ZHANG Feng(Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan,China;College of Mechanics and Materials,Hohai University,Nanjing 210000,Jiangsu,China)

机构地区：[1]中冶长天国际工程有限责任公司,湖南长沙410205 [2]河海大学力学与材料学院,江苏南京210098

出　　处：《工程建设》2024年第6期9-14,共6页Engineering Construction

摘　　要：尾矿库库底铺膜层构成的土工复合材料衬垫系统往往形成薄弱层面威胁坝体的稳定性,在分析中需要重点关注。文章基于水工分析系统Autobank对铺膜面形成的衬垫薄弱层进行标记,在最危险滑动面的搜索中若搜索圆弧与衬垫薄弱层相交,则增加考虑该薄弱层与部分圆弧构成的复合滑动面,计算方法采用适用各种形状滑面的摩根斯顿法,以得到库身的最小抗滑稳定安全系数。算例分析结果表明:部分通过土工衬垫薄弱层的复合滑动面安全系数较小,且该平移滑动是完全可能发生的,为该剖面的最危险滑动面。本文结果可为尾矿库设计和运行提供科学依据,并为同类工程提供参考。The geosynthetic composite lining system composed of a membrane layer at the bottom of a tailings pond often forms a weak layer that threatens the stability of the dam body,thus requires special attention in the analysis.This article is based on the hydraulic analysis system Autobank to mark the weak layer of the lining formed by the film laying surface.If the search for the most dangerous sliding surface intersects with the weak layer of the lining,a composite sliding surface composed of the weak layer of the lining and some arcs is added.The calculation method adopts the Morgenston method applicable to various shapes of sliding surfaces to obtain the minimum anti sliding stability safety factor of the storage body.The analysis of calculation examples considering different positions of membrane laying shows that the safety factor of the composite sliding surface partially passing through the weak layer of the geotechnical lining is relatively small,and this translational sliding is completely possible,making it the most dangerous sliding surface in this section.The results of this article can provide scientific basis for the design and operation of tailings ponds,and provide references for similar projects.

关 键 词：土工复合材料衬垫系统 刚体极限平衡法 薄弱层 Autobank 

分 类 号：TU926.4[建筑科学—建筑设计及理论]