摘要
以神府高速墩梁大跨度黄土隧道工程为依托,总结了三台阶七步开挖法和双侧壁导坑法的施工工序,并结合有限元数值模拟分析,对两种方法进行研究。结果表明:双侧壁导坑法可有效控制围岩变形和沉降,但工序繁杂,施工进度慢;三台阶七步开挖法可有效提高施工效率,加快施工进度,但不能有效控制沉降。
Based on the project of long-span loess tunnel on Shenmu-Fugu Expressway, the construction processes of three-stair seven-step method and two side-wall pilot tunnel method were summarized, and studied with finite element method. The results indicate that two side-wall pilot tunnel method can effectively control the deformation of surrounding rocks and settlement, however it has disadvantages of complicated procedures and low efficiency; three-stair seven-step method can boost the progress, but fail to control the settlement.
出处
《筑路机械与施工机械化》
2013年第8期89-92,共4页
Road Machinery & Construction Mechanization
关键词
黄土隧道
数值模拟
沉降
变形
loess tunnel
numeric simulation
settlement
deformation
