高黏粒含量防渗土料的反滤排水优化研究  

Study on Filter Drainage Optimization of Anti-seepage Earth Material with High Clay Content

作　　者：符锋 章魏 田辉 FU Feng;ZHANG Wei;TIAN Hui(Yunnan Institute of Water&Hydropower Engineering Investigation,Design and Research,Kunming 650021,China)

机构地区：[1]云南省水利水电勘测设计研究院

出　　处：《中国水能及电气化》2019年第8期29-35,共7页China Water Power & Electrification

摘　　要：德厚水库是一座建设于岩溶区的大型水利工程,大坝采用黏土心墙堆石坝,防渗心墙采用南方红黏土填筑,防渗性能好,但高黏粒含量带来反滤保护设计要求高、颗粒细、带宽较窄、加工难度大的问题。文章通过对单独心墙料及在4组不同颗粒组成的Ⅰ反料保护下的渗透破坏试验研究,找到渗透破坏临界比降,为设计对反滤料进行优化调整提供了技术支撑,解决了工程实际困难,可为类似以典型南方红黏土筑坝的工程提供借鉴。Dehou Reservoir is a large-scale water conservancy project built in karst area.Clay core-wall rock-fill dam is adopted.The impervious core wall is filled with southern red clay.The seepage prevention performance is excellent.However,high clay contents lead to high requirements on filtering protection design,fine particles,narrow band width and processing difficulty.The seepage failure critical gradient is discovered in the paper through seepage failure test research undersingle core wall material the protection of I reversed filter composed of four groups of different particles,thereby providing technical support for optimization and adjustment of filter materials in the design.Engineering practical difficulty is solved on the one hand.Meanwhile,reference is provided for similar typical southern red clay dam construction project on the other hand.

关 键 词：德厚水库 红黏土 反滤 

分 类 号：TV41[水利工程—水工结构工程]