摘要
以新建京张铁路草帽山隧道为工程背景,针对隧道洞身上半断面为低含水率粉细砂地层的段落,开挖后拱顶漏砂、掌子面流沙、隧道成洞能力极差的难题,展开粉细砂地层隧道化学注浆超前支护技术研究。
Taking the Caomaoshan tunnel of the newly built Beijing to Zhangjiakou Railway as the engineering background, aiming at the section with the upper half section of the tunnel body in the low water content silty sand stratum, the problems of sand leakage on the arch crown, quicksand on the face of the tunnel and the poor ability of the tunnel to form the tunnel after excavation, the advance support technology of chemical grouting for the tunnel in the silty fine sand stratum is studied.
作者
周云定
程坤
ZHOU Yun-ding;CHENG Kun(Sinohydro Bureau 7 Co.Ltd.,Chengdu 611730,China)
出处
《工程建设与设计》
2020年第5期120-121,145,共3页
Construction & Design for Engineering
关键词
低含水率
粉细砂地层
化学注浆
low moisture content
silty sand layer
chemical grouting
