水布垭大坝心墙防渗料现场碾压试验研究

Field Compaction Test on Seepage Proof Materials for Core Wall of Shuibuya Dam

心墙堆石坝是清江水布垭水利枢纽的代表性坝型之一。为深入了解认识风化料和碎石土作为心墙防渗料的可靠性，开展了现场碾压试验研究。结果表明：页岩风化料作为心墙防渗料是可行的，特别是全、强上混合料，更具有可靠的防渗性能；但应注意强风化上带料的不均匀性，控制好全风化料的掺入量、级配、含水量，并充分压实以保证其满足防渗要求。庙王沟碎石土料具有良好的压实性，是一种理想的心墙防渗料。

Core wall rockfill dam is one of the representative types of the Shuibuya Project on the Qingjiang River .For deeply recognizing the reliability of the weathered rock and crushed rock soil used as seepage proof material for the core wall,the field compaction test was conducted.The test results indicated that the weathered shale rock soil core wall seepage proof is feasible;especially,the seepage proof properties of the mixed material composed of fully weathered rock and strong weathered rock of the upper zones are more reliable.To fulfill the seepage proof demand,the non uniformity for the upper zone material of strong weathered rock and the mixed quantities,gradations and moisture contents for fully weathered rock should be well controlled ,and be fully compacted.The crushed rock soil possessing good compacting properties in Miaowanggou storage yard is one kind of ideal seepage proof material for core wall.