富水砂卵石地层盾构端头井加固技术研究  

Study on Reinforcement of Shield End Well in Saturated Sandy Pebble Stratum

作　　者：龚振宇 程盼盼[2] 徐前卫[2] 

机构地区：[1]中铁五局电务城通公司,湖南长沙410205 [2]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《华东交通大学学报》2016年第3期40-46,共7页Journal of East China Jiaotong University

摘　　要：北京地铁8号线天桥—永定门外区间盾构接收端头处隧道埋深较大,且含有富水砂卵石地层,盾构到达时发生涌砂涌水的风险较大,因此对此端头井进行了加固方案设计。首先通过比选确定了加固方法;然后按照理论计算和经验类比确定了加固范围;最后通过理论计算和数值模拟对降水方案进行了设计,可为今后同类工程的设计和施工起到一定的借鉴作用。The tunnel section of shield end from Tianqiao-Yongdingmenwai of Beijing Metro Line 8 is deeply buried and contains water-rich sandy cobble stratum. In order to reduce the risk of gushing water and sandstone when the shield arrives, a soil reinforcement scheme is designed. Firstly, the way to reinforce is determined by comparing different methods; then according to theoretical calculation and experience analogy, the scope of soil reinforcement is obtained; finally, precipitation scheme is presented through theoretical calculation and numerical simulation. The results can provide reference for future design and construction of similar projects.

关 键 词：砂卵石地层 端头加固 旋喷桩 加固范围 降水方案 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]