砂质黄土大断面隧道施工方法优化研究

辛振省

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铁道工程学报 ›› 2011, Vol. 28 ›› Issue (1) : 58-61.

路网研究

砂质黄土大断面隧道施工方法优化研究

辛振省

作者信息 +

Research on Optimization of Construction Method for Sandy Loess Large Section Tunnel

XIN Zhen- sheng

Author information +

文章历史 +

摘要

研究目的：采用数值计算的方法, 对砂质黄土大断面开挖方法进行优化研究, 并对选择的方法进行仿真分析, 根据围岩力学行为及分布规律, 得到更为适合现场的施工方法。

研究结论: 以工程实例为对象, 以数值计算和工艺研究为手段, 对大断面隧道开挖方法进行优化研究, 研究结果表明: 砂质黄土大断面隧道施工中, 短台阶七步法在施工力学方面分布合理, 更有利于围岩稳定, 总体沉降较小, 相比CD和CRD方法具有较好的适应性。短台阶七步法在砂质黄土地层中施工作业面连续, 整体作业面大, 适于大型机械施工, 施工速度快, 效益明显。

Abstract

Research purposes: By m eans o f numericalmethods, the research is done on the optim ization o f excavation methods for the sandy loess large section tunne,l and the simu lation analysis w as made for the se lected methods.A ccording to the mechanical behav ior and distribu tion law of the w all rock, the more su itable construct ionm ethods for construction sitew ere obta ined.

Research conclusions: By means of numerica l calcu lation and techno logy research, the research w as done on opt im izat ion of excavation methods for the sandy loess large section tunne.l The resu lts showed that the short bench sevenstepm ethod used for construction of sandy loess large section tunnel w as reasonable in the construction m echanics and more conduc ive to the stab ility o f thew a ll rock o f tunne lw ith a little sett lem en.t Compared w ith the CD method and CRD method, this method has good adaptability. When the short bench seven - step method is used for construct ion sandy loess tunne,l the overall construct ion w ork surface is continuous and it is su itable for large- sizemachinery construction w ith the features o f faster construct ion and more benefits.

导出引用

辛振省. 砂质黄土大断面隧道施工方法优化研究[J]. 铁道工程学报, 2011, 28(1): 58-61

XIN Zhen- sheng. Research on Optimization of Construction Method for Sandy Loess Large Section Tunnel[J]. Journal of Railway Engineering Society, 2011, 28(1): 58-61

中图分类号： U25

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