高寒地区厂房基础无盖重固结灌浆施工技术  

Technology of Consolidation Grouting without Cover for Powerhouse Foundation in High and Cold Area

作　　者：杨大鸿 翁锐[1] 陈立成 YANG Dahong;WENG Rui;CHEN Licheng(Sinohydro Bureau 7 Co.,Ltd.,Chengdu 611130,China;DG Hydropower Branch,Huadian Xizang Energy Co.,Ltd.,Shannan 856000,China)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都611130 [2]华电西藏能源有限公司大古水电分公司,西藏山南856000

出　　处：《水电与新能源》2019年第12期68-71,共4页Hydropower and New Energy

摘　　要：某水电站厂房基础海拔3 340 m,受工期限制拟在冬季进行无盖重固结灌浆,因此处最低气温达-13℃,施工过程中一系列温控措施是本工程的难点。通过研究探索合理的措施,保证了浆液拌合水温、灌浆水管与水泵及施工场地的适宜温度等,并采用合理的灌浆流程与工艺,顺利完成了灌浆。经钻孔检查,岩芯采取率达到90%以上,物探测试均满足设计要求,灌浆效果良好。DG Hydropower Station is located in high and cold area with the altitude of 3340 m and the lowest temperature of-13 ℃. Due to the requirement of the construction schedule, it is planned to carry out the consolidation grouting of the powerhouse foundation without cover in winter. The temperature control of the whole grouting work is thus a difficult task. Through a field grouting test, proper temperature control measures, grouting process and detailed construction technology are proposed, which ensure the temperatures of the slurry mixing water, grouting pipe and pump, and the construction site are eligible. With these measures and technology, the grouting work is successfully completed and satisfactory grouting effect is achieved. Drilling inspection shows that the core extraction rate of the grouted foundation is over 90%. The geophysical testing results also meet the design requirements.

关 键 词：DG水电站 高寒地区 无盖重固结灌浆 工艺流程 灌浆效果 

分 类 号：TV543[水利工程—水利水电工程]