摘要
以东莞市轨道交通R2线2309标盾构区间为依托,分析了盾构在孤石及上软下硬地层中掘进的施工风险;通过采用提前破碎基岩、预设好换刀加固点和合理的掘进模式及参数等,妥善解决了该地层中的施工难题。
Based on the example of Bid 2309 of R2 line of Dongguan City Rail Line,the paper analyzes the construction risk of shielding in solitary stone and soft under the hard strata excavation.It properly solves the construction difficulties by advanced rock crushing,presetting blade change point and reasonable tunneling model and parameters.
出处
《铁道建筑技术》
2014年第9期18-20,共3页
Railway Construction Technology
关键词
上软下硬地层
盾构掘进
风险对策
孤石
soft under hard formation
shield tunneling
risk countermeasures
boulder
