摘要
水利工程中,坝上游的河床变化会破坏坝的防渗铺盖,致使工程出现险情。处理中经方案选择比较,最后选定为复合式土工薄膜防渗进行修复加固。土工薄膜设计选用150m/m^2 聚氯乙烯无纺土工织物,上热喷 0.3mm聚乙烯薄膜做成单面复合式土工薄膜,要求幅宽1.5m,喷膜均匀。无孔洞,粘合率50％以上。防渗体的结构设计充分考虑满足坝的防渗要求,严格施工。
The front seepage control bedding of a dam can be damaged by the upstream bed changing and caused the emergency danger in water projects. The complex geomembranes for seepage control can be chosen for repairing and solidifying the broken bedding by comparison of different alternatives. The single side complex geomembranes can be made by the 150g/m^2 polyvinyl chloride non-fabric geomembrane and adding hot spray of 0. 3mm polyvinyl film. The standard geomembrane should be 1. 5m in width, uniform spray film, non-holes and over 50 % of bond force. The de- sign of seepage control structure should sufficiently consider. The demand of seepage control of the dam and strict con- struction. The treatment affect of the Changshui diversion project was pretty satisfactory.
