某特高心墙堆石坝防渗砾石土料级配改良现场试验  

Field Test on Grading Improvement of Anti-seepage Gravel Soil for An Extra-high Core Rockfill Dam

作　　者：郑星 魏伟琼 张建博 杨文超 毛华 段兴林 ZHENG Xing;WEI Wei-qiong;ZHANG Jian-bo;YANG Wen-chao;MAO Hua;DUAN Xing-lin(Power China Guiyang Engineering Corporation Limited,Guiyang 550081,China;Guizhou Province Key Laboratory of Geomechanics and Engineering Safety,Guiyang 550081,China;Huaneng Lancang River Hydropower Inc.,Kunming 650214,China)

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081 [2]贵州省岩土力学与工程安全重点实验室,贵州贵阳550081 [3]华能澜沧江水电股份有限公司,云南昆明650214

出　　处：《云南水力发电》2023年第1期55-61,共7页Yunnan Water Power

摘　　要：针对某特高砾石土心墙堆石坝天然防渗土料粗粒含量偏高、细粒及黏粒含量偏低的缺陷,设计了级配筛分改良工艺。现场开展了大量级配改良试验,获得大量试验数据,通过分析成品土料获得率、对比天然土料与改良后成品土料级配,证明了筛分改良工艺对该工程防渗土料的级配缺陷改良效果是显著的,经过改良后的土料可以满足300m级特高土石坝设计要求。In view of the defects of high coarse-grained and low fine-grained and clay-grained natural impervious soil materials of an extra-high gravel earth core rockfill dam, this paper designs a graded screening improvement process. A large number of gradation improvement tests were carried out on site and a large number of test data were obtained. By analyzing the yield of finished soil material and comparing the gradation of natural soil material with that of improved soil material, it is proved that the sieving improvement process can significantly improve the grading defects of impervious soil material in this project. The improved soil material can meet the design requirements of 300m grade extra-high earth-rock dam.

关 键 词：特高土石坝 防渗土料 级配改良 试验研究 

分 类 号：TV41[水利工程—水工结构工程]