深厚覆盖层土石围堰悬挂式防渗墙参数优化设计  

Design Optimization of Suspended Cut-off Wall Parameter of a Rockfill Cofferdam on Deep Overburden Layer

作　　者：马发明 卢泽 陶芳煜 周鑫 白玉莲 MA Faming;LU Ze;TAO Fangyu;ZHOU Xin;BAI Yulian(Chengdu Branch of China Anneng Group Third Engineering Bureau Co.,Ltd.,Chengdu 611135,Sichuan,China;National Engineering Research Center for Inland Waterway Regulation,Chongqing Jiaotong University,Chongqing 400074,China)

机构地区：[1]中国安能集团第三工程局有限公司成都分公司,四川成都611135 [2]重庆交通大学水利水运工程教育部重点实验室,重庆400074

出　　处：《水力发电》2023年第9期35-40,共6页Water Power

基　　金：重庆市自然科学基金项目(cstc2021jcyj-msxmX0869);重庆市教委科学技术研究项目(KJ202200709);水利水运工程教育部重点实验室开放基金资助项目(SLK2021B09);重庆市级大学生创新创业训练计划资助项目(S202310618010)。

摘　　要：深厚覆盖层中的悬挂式防渗墙高度对土石围堰渗流特征起到重要作用。综合考虑围堰施工工期、经济性及安全性,借助有限元法对深厚覆盖层土石围堰悬挂式防渗墙的合理设计高度进行了探讨,系统分析了不同工况下悬挂式防渗墙高度对围堰渗流特征的影响规律,在此基础上探讨了上游不同水位高程对围堰渗流特征的影响。结果表明,悬挂式防渗墙设计高度50 m时渗流参数最优,具有可行性,但随着上游水位升高,应注意采取适当措施进行渗流控制。The height of suspended cut-off wall in deep overburden layer plays an important role in controlling the seepage stability of rockfill cofferdam.Considering the construction period,economy and safety of the cofferdam,the reasonable design height of the suspended cut-off wall is discussed based on finite element numerical simulation,and the influences of cut-off wall height on seepage stability of cofferdam under different operation conditions are analyzed.In addition,the influence of different upstream water levels on cofferdam seepage characteristics is further discussed.The results show that,when the design height of the suspended cut-off wall is 50 m,the seepage characteristics are optimal,but with the rise of upstream water level,appropriate measures should be taken to control the seepage.

关 键 词：深厚覆盖层 土石围堰 悬挂式防渗墙 高度 渗流特征 影响 有限元分析 

分 类 号：TV223.4[水利工程—水工结构工程]