三向位移作用下面板堆石坝周边缝“W”型铜止水变形特性研究  

Research on the Deformation Characteristics of“W”Type Copper Water Stop at Peripheral Joints of CFRD under Three-dimensional Displacement

作　　者：曹利军 马超 彭文哲[1] 王伟 熊国文 CAO Li-jun;MA Chao;PENG Wen-zhe;WANG Wei;XIONG Guo-wen(Shuifa Planning and Design Co.Ltd.,Jinan 250014,China;Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]水发规划设计有限公司,济南250014 [2]南京水利科学研究院,南京210029

出　　处：《中国农村水利水电》2021年第4期177-181,187,共6页China Rural Water and Hydropower

摘　　要：为提高面板堆石坝周边缝的防渗性能、探究“W”型铜止水的变形规律,采用自制的加载平台,对“W”型铜止水分别进行了不同张开、沉降位移下的剪切试验,拟合得到了铜止水变形量与剪切失效位移间的关系式,揭示了施加张开、沉降位移越大铜止水越早出现屈曲失稳现象的基本变形规律;同时结合有限元分析深入探讨了铜止水在不同位移下的变形特点,研究了止水结构长度对铜止水剪切失效位移的影响,得出在张开位移和沉降位移较小时铜止水鼻子折曲长度越长铜止水适应变形能力越强的结论。In order to improve the anti-seepage performance of peripheral joints of concrete faced rockfill dam and explore the deformation law of“W”type copper water stop,the shear tests of“W”type copper water stop under different expand and settlement displacements are carried out by using self-made loading platforms,and the relationship between deformation and shear failure displacement of copper water stop is obtained by fitting.It is also revealed that the greater the expand and settlement displacement is,the earlier the copper water stop produces buckling instability.What’s more,combined with the finite element analysis,the deformation characteristics of copper water stop under different displacements are discussed,and the influence of structural length of water stop on shear failure displacement is also studied.Based on the results,it is concluded that under small expand and settlement displacements,the longer the bending length of copper water stop nose is,the stronger the ability of copper water stop to adapt to deformation is.

关 键 词：面板堆石坝 周边缝 铜止水 允许变形 

分 类 号：TV321[水利工程—水工结构工程]