基于Midas的不同土石坝防渗体系效果分析  

Analysis of the Effect of Different Anti-Seepage Systems for the Earth-Rock Dam

作　　者：彭昆 马雅丽 PENG Kun;MA Ya-li(Wuhan Luojia Landscape Design Consulting Co.Ltd.,Wuhan 430000,China)

机构地区：[1]武汉珞珈山水设计咨询有限公司,武汉430000

出　　处：《水利科技与经济》2020年第1期43-47,共5页Water Conservancy Science and Technology and Economy

摘　　要：采用有限元软件Midas gts nx对斜心墙+水平铺盖和心墙+混凝土防渗墙两种土石坝常用的防渗体系进行渗流计算,分析两种防渗体系下土石坝的渗流压力水头、渗径、浸润线和渗流量。结果表明,斜心墙+水平铺盖防渗体系能有效延长渗径,降低坝体内部的浸润线高度;心墙+混凝土防渗墙能有效阻断渗径,减小坝体和地基中的渗流量,防渗效果较斜心墙+水平铺盖防渗体系更显著。因此,在覆盖层不深厚时,建议优先选用心墙+混凝土防渗墙体系对土石坝进行防渗处理。The seepage calculation of sloping core wall+horizontal bedding and core wall+concrete cut-off wall are carried out by using finite element software Midas gts nx.The seepage pressure head,seepage paths,saturation line and seepage flow of earth-rock dam under the two kinds of seepage control systems are analyzed.The results show that the seepage paths can be effectively prolonged and the height of the infiltration line in the dam body can be reduced by the diaphragm core wall+horizontal bedding anti-seepage system.The seepage paths can be effectively blocked by the core wall+concrete anti-seepage wall,and the seepage flow in the dam body and foundation can be reduced.The anti-seepage effect is more remarkable than that of the diaphragm core wall+horizontal bedding anti-seepage system.Therefore,when the overburden is not deep,it is suggested that the core wall+concrete cut-off wall system should be used as the priority for seepage control of earth-rock dams.

关 键 词：土石坝 心墙 斜心墙 防渗墙 水平铺盖 渗流 

分 类 号：TV543[水利工程—水利水电工程]