碾压砼坝上游面防渗湿喷工艺改进  

Improvement of shotcreting technique for anti-seepage coating of roller compacted concrete dam

作　　者：蔡跃波[1] 林宝玉[1] 单国良[1] 

机构地区：[1]南京水利科学研究院材料结构研究所

出　　处：《水利水运科学研究》1997年第2期171-176,共6页

基　　金："八五"国家重点科技攻关项目

摘　　要：针对碾压砼坝上游面的防渗，提出了湿法喷涂丙乳砂浆集中防渗的新方案。增设了喷粉辅助机械系统，改进了辅料系统及喷枪结构。改进后的湿喷工艺能缓解稠浆易增，稀浆易淌的缺陷。并已成功地应用于福建省山仔碾压砼坝上游面的防渗等工程。A new method for anti - seepage coating of roller compacted concrete dam by using wet - mix shotcreting polyacrylate emulsion cement mortar(PAE mortar) is presented in this paper. A series of experiments are carried out for improving wet - mix shotcrete from technology and facilities to mixture of mortar. A fume - spray machine system is designed, the delivery system and the structure of spray gun are improved. The shortcoming on pipe - blocking by thick mortar and flow away of thin fluidity mortar from substrate is mitigated significantly. The improved shotcrete technique had been successfully applied in anti - seepage coating of Shanzai roller compacted concrete dam etc.

关 键 词：丙乳砂浆 防渗 碾压混凝土坝 挡水坝 湿法喷涂 

分 类 号：TV642.2[水利工程—水利水电工程] TV698.233