富水卵石层基坑注浆封底隔水处理及参数优化探讨  

Discussion on Grouting Bottom-sealing Water-repellent Treatment and Parameter Optimization for Foundation Pit of Water-rich Pebble Stratum

作　　者：李世明 罗安民 刘光彬 骆俊晖 LI Shi-ming;LUO An-min;LIU Guang-bin;LUO Jun-hui(Guangxi Communications Design Group Co.,Ltd.,Nanning,Guangxi,530029)

机构地区：[1]广西交通设计集团有限公司,广西南宁530029

出　　处：《西部交通科技》2019年第4期7-9,62,共4页Western China Communications Science & Technology

摘　　要：在富水卵石层地区进行堵水防渗,注浆法是一种既经济又有效的方法。文章以荔浦至玉林高速公路平南连接线平南三桥北主墩基坑底卵石层注浆为例,对浆液类型的选择、浆液配比、注浆压力、注浆工艺等方面进行探讨,并结合施工开挖实际,验证采用水泥-水玻璃双液注浆可保证堵水防渗的效果,为今后富水卵石地区堵水防渗工程提供工程经验。Water-blocking and seepage prevention is carried out in the water-rich pebble stratum area,the grouting method is an economical and effective method.With the grouting of pebble stratum at the bottom of North Main Pier foundation pit of Pingnan Third Bridge in Pingnan connecting line of Lipu-Yulin Expressway as the example,this article discusses the selection of slurry type,slurry mix ratio,grouting pressure and grouting technology,then,combined with the actual construction excavation,it verifies that the cement-sodium silicate dual-liquid grouting can ensure the effect of water blocking and seepage prevention,thus providing the engineering experience for the water blocking and seepage prevention project in water-rich pebble area in the future.

关 键 词：基坑 富水卵石地层 水泥-水玻璃双液注浆 袖阀管 堵水防渗 

分 类 号：U416[交通运输工程—道路与铁道工程]