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某浅埋偏压连拱隧道二衬开裂原因分析
Reasons why the second lining of one shallow asymmetry doublearch tunnel cracks
【摘要】 某浅埋偏压连拱隧道中导洞开挖中隔墙浇筑后,对靠近山体内侧的右洞先行开挖和支护,再进行靠近山体外侧的左洞的开挖,右洞二衬出现部分地段纵向开裂.针对该隧道实际情况,建立数值分析模型,分析了现有地质和施工条件下该隧道二衬开裂的主要原因,提出了类似条件下合理的连拱隧道施工工序.
【Abstract】 During the construction of a shallow asymmetry double-arch tunnel,the right tunnel near the inner of mountain has been excavated firstly,and then the left tunnel near the exterior of mountain excavated.However,some cracks occurred in the second lining of the right tunnel.Based on the field geological conditions and construction circumstances,an analytical model was created to analyze the reasons of the cracks.A reasonable construction procedure of shallow asymmetry double-arch tunnel was put forward in this paper.
【关键词】 连拱隧道；
浅埋；
偏压；
二衬开裂；
【Key words】 double-arch tunnel； shallow； asymmetry pressure； lining crack；
【Key words】 double-arch tunnel； shallow； asymmetry pressure； lining crack；
【基金】 国家自然科学基金资助项目(50308029)
- 【文献出处】 长沙理工大学学报(自然科学版) ,Journal of Changsha University of Science & Technology(Natural Science) , 编辑部邮箱 ,2007年03期
- 【分类号】U455.91
- 【被引频次】12
- 【下载频次】241