特高心墙堆石坝蓄水工况非稳定渗流分析  

Unsteady Seepage Analysis of Extra-high Core-wall Rockfill Dam During Impoundment

作　　者：杨会刚 刘得潭 商永喜 王峻峰 徐力群[3] 黄章鑫 YANG Huigang;LIU Detan;SHANG Yongxi;WANG Junfeng;XU Liqun;HUANG Zhangxin(Datang Sichuan Power Generation Co.,Ltd.,Chengdu 610083,China;Datang Hydropower Science&Technology Research Institute Co.,Ltd.,Chengdu 610074,China;College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]大唐四川发电有限公司,四川成都610083 [2]大唐水电科学技术研究院有限公司,四川成都610074 [3]河海大学水利水电学院,江苏南京210098

出　　处：《人民珠江》2023年第6期70-76,共7页Pearl River

基　　金：大唐集团公司科研项目(CHB-FW170-2021)。

摘　　要：某特高心墙堆石坝库水位在蓄水期上升较快,为保证心墙等关键部位的渗透稳定性,根据实际监测资料确定计算工况,基于非稳定饱和-非饱和渗流理论,采用有限元法计算坝体非稳定渗流场。计算结果表明:蓄水过程中,心墙防渗效果较好,坝体内等势线向心墙上游侧表面集中,渗透坡降最大达到11.52,此值超过了心墙现场检测的平均破坏坡降,但并未达到反滤层保护下的允许渗透坡降,渗透稳定满足要求。计算成果可为此工程后续蓄水以及类似工程提供参考。The water level of an extra-high core-wall rockfill dam rises rapidly during the impoundment period.To ensure the seepage stability of key parts such as the core wall,this study determines the calculation conditions according to the actual monitoring data.Based on the unstable saturated-unsaturated seepage theory,the finite element method is applied to calculate the unsteady seepage field of the dam.The calculation results show that the anti-seepage effect of the core wall is good during impoundment.The equipotential lines in the dam body are concentrated on the upstream side surface of the core wall,and the maximum seepage gradient reaches 11.52.The value exceeds the average failure gradient of the core wall in the field test but does not reach the allowable seepage gradient under the protection of the filter layer.Therefore,the seepage stability meets the requirements.The calculation results can provide a reference for the subsequent impoundment of this project and other similar projects.

关 键 词：砾石土心墙堆石坝 蓄水工况 非稳定渗流场 渗透稳定性 

分 类 号：TV139.14[水利工程—水力学及河流动力学]