桂林理工大学学报2012，Vol.32Issue(1)：77-81,5.DOI:10.3969/j.issn.1674-9057.2012.01.012
浅埋偏压段大断面隧道施工方案及施工工序优化
Construction Scheme and Procedure Optimization of Large-Section Tunnel in Shallow and Unsymmetrical Pressure
摘要
Abstract
Dongziyan Tunnel of Baotou-Xi'an railway is a complicated tunnel which contains large sections, soft rock, shallow and eccentric compression sections. The construction mechanical behavior of this tunnel is analyzed by simulating tri-bench excavation method, CRD method and double-side-drift method with FLAC 5. 0 finite different calculation software. The double-side-drift method is determined as the tunnel construction program. The displacement of surrounding rocks, internal forces of supporting, surface settlement and plastic zones caused by different construction scheme are analyzed by double-side-drift method. The optimized construction procedure is excavating the shallow firstly and then the deep one. It can effectively control the peripheral displacement of tunnel cave. The numerical simulation is consistent with on-site monitoring results.关键词
浅埋偏压/大断面隧道/数值模拟/双侧壁导坑法/围岩/支护Key words
large section tunnel/ shallow and unsymmetrical pressure/ numerical simulation/ double-side-drift method/ construction scheme/ construction procedure/ optimization分类
交通工程引用本文复制引用
柳墩利..浅埋偏压段大断面隧道施工方案及施工工序优化[J].桂林理工大学学报,2012,32(1):77-81,5.基金项目
铁道部科技开发计划项目(2005K001-B-2) （2005K001-B-2）
