摘要
以兰渝铁路关子岭隧道工程为依托,针对大断面隧道的施工方法进行数值模拟,分别对台阶式、双侧壁导洞式、全断面开挖,以及导洞超前扩挖四种开挖方式进行计算,对比应力、位移和塑性区,得到较优的开挖方案。计算结果表明,双侧壁导洞式与导洞扩挖式开挖位移变化幅度较小,没有出现拉应力,塑性区对称分布,施工难度较小,且面积较小,优于其他方案。
Taking Guanziling tunnel on Lanzhou-Chongqing railway as the background,numerical simulation was carried out for the construction of large-section tunnel,calculations were performed for the bench method,double side-headings,full-face excavation and enlarged excavation with advanace heading respectively.Better excavation options were obtained after the comparison of stresses,displacements and plastic zons from all options.Calculated results indicated that the options of double side-headings and enlarged excavation with advance heading were better and easier for construction,with small variation amplitude of displacemens and without tensile streses,with symmetrical plastic zones and with smaller working area.
出处
《现代隧道技术》
EI
北大核心
2011年第2期37-43,共7页
Modern Tunnelling Technology
基金
铁道部科技研究开发计划项目(2009G009-B-06)
关键词
铁路隧道
数值模拟
有限元分析
Railway tunnel
Numerical simulation
Finite element analysis
