基于敏感性分析的沥青心墙堆石坝渗流观测布置及其改进分析  

Observation Scheme Arrangement and Improvement in Asphalt Concrete Core Rockfill Dam Based on Seepage Sensitivity Analysis

作　　者：童广勤 张海龙 佘成学[2] 王静云[3] 汪昌港 TONG Guangqin;ZHANG Hailong;SHE Chengxue;WANG Jingyun;WANG Changgang(China Three Gorges Corporation,Yichang,Hubei 443133,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan,Hubei 430072,China;Sinohydro Engineering Bureau 8 Co.,Ltd.,Changsha,Hunan 410000,China)

机构地区：[1]中国长江三峡集团有限公司流域枢纽运行管理中心,湖北宜昌443133 [2]武汉大学水资源与水电工程国家重点实验室,湖北武汉430072 [3]中国水利水电第八工程局有限公司,湖南长沙410000

出　　处：《水利与建筑工程学报》2023年第5期99-104,共6页Journal of Water Resources and Architectural Engineering

基　　金：国家杰出青年基金资助项目(51925906)。

摘　　要：为了给沥青混凝土心墙堆石坝渗流观测设施升级改造提供参考依据,结合某已建沥青混凝土心墙堆石坝工程,对现有观测设施进行分析,并对渗流观测设施布置改进进行探讨。通过三维有限元渗流敏感性计算分析,论证实测渗流量与计算渗流量存在很大差异与上游坝壳料、心墙等的渗透性变异与否相关;分析现有渗流观测布置存在的不足。在此基础上,针对上游坝壳材料和沥青混凝土心墙,设计渗流观测布置改进方案,并通过敏感性计算分析,论证方案的可行性。该分析加深了对现有渗流观测设施监控功能的认识,同时为改进现有渗流观测设施提供了理论参考,也可为同类大坝渗流安全监控布置设计及安全管理提供参考。With respect to an asphalt core wall rockfill dam project,the existing observation facilities are analyzed,and the improvement of the arrangement of seepage observation facilities is discussed,so as to provide reference for the upgrading of the observation facilities.Through the three⁃dimensional finite element seepage sensitivity calculation,it is proved that the great difference between the measured seepage flow and the calculation has nothing to do with the permeability variation of the upstream dam shell material and core wall.The shortcomings of the existing seepage observation arrangement are analyzed.On this basis,the seepage observation arrangement of the upstream dam shell and the asphalt concrete core wall is proposed,and the feasibility of the scheme is demonstrated through sensitivity calculation.The research deepens the understanding of the monitoring function of the existing seepage observation facilities,provides a theoretical reference for improving the existing seepage observation facilities,and also provides a reference for the layout design and safety management of the seepage safety monitoring of similar dams.

关 键 词：堆石坝 渗透系数 有限元 敏感性 沥青混凝土心墙 

分 类 号：TV641.4[水利工程—水利水电工程]