河床地形对面板堆石坝应力变形影响分析  

Analysis on Stress-deformation Effect of Riverbed Topography on Concrete Faced Rockfill Dam

作　　者：梁勐 孙屹 吴平 刘斯宏[1] 朱安龙 LIANG Meng;SUN Yi;WU Ping;LIU Sihong;ZHU Anlong(College of Water Conservancy&Hydropower Engineering,Hohai Univ.,Nanjing 210098,China;Jiangxi Hydraulic Structure Engineering Technology Research Center,China Railway Water Conservancy&Hydropower Planning and Design Group Co.,Ltd.,Nanchang 330029,China;Power China Huadong Engineering Co.,Ltd.,Hangzhou 311122,China;Pumped Storage Engineering Branch of National Ener-gy and Hydropower Engineering Technology Research&Development Center,Hangzhou 311122,China)

机构地区：[1]河海大学水利水电学院,南京210098 [2]中铁水利水电规划设计集团有限公司江西省水工结构工程技术研究中心,南昌330029 [3]中国电建集团华东勘测设计研究院有限公司,杭州311122 [4]国家能源水电工程技术研发中心抽水蓄能工程分中心,杭州311122

出　　处：《三峡大学学报（自然科学版）》2022年第2期24-29,共6页Journal of China Three Gorges University：Natural Sciences

基　　金：江西省水利科技项目重点课题(201921ZDKT13)。

摘　　要：河床地形是影响面板堆石坝应力变形特性的重要因素.应用非线性有限元方法,对坝基倾向下游及河床中部存在凸起的某在建面板堆石坝进行研究,得出存在该地形的面板堆石坝的应力变形规律.结果表明:坝基倾向下游地形会扩大坝体向下游位移区域、增大向下游位移数值并使最大沉降位置向下游偏移;同时会使面板靠近趾板附近产生拉应力;河床中部凸起地形会将坝体位移分布规律在此处分为对称的两个区域,且凸起附近坝体应力等值线较密集,应力数值较大.面板在凸起两侧轴向位移相反,该处面板出现拉应力的同时,垂直缝张开,对止水系统不利.Riverbed topography is an important factor affecting the stress-deformation characteristics of concrete faced rockfill dam(CFRD). The non-linear finite element method was used to study a concrete faced rockfill dam under construction which is protruding downstream of dam foundation tendency and middle of riverbed. The stress and deformation law of concrete faced rockfill dam with this terrain were obtained. The results show that: The downstream topography of dam foundation inclination will enlarge the area of dam body displacement downstream, increase the value of displacement downstream, and shift the maximum settlement position downstream. At the same time, the tensile stress will occur near the toe plate;The convex terrain in the middle of the riverbed will divide the displacement distribution law of the dam into two symmetrical regions, and the stress contour of the dam near the convex is dense and the stress value is large. The axial displacement of the panel on both sides of the bulge is opposite. When tensile stress occurs on the panel, the vertical seam is opened, which is unfavorable to the water sealing system.

关 键 词：面板堆石坝 地形 应力变形 有限元 

分 类 号：TV641.4[水利工程—水利水电工程]