张向东, 孙国志. 隧道冻结法施工引起地表沉降的数值分析[J]. 力学与实践, 2008, 30(2): 78-82. DOI: 10.6052/1000-0992-2006-493
引用本文: 张向东, 孙国志. 隧道冻结法施工引起地表沉降的数值分析[J]. 力学与实践, 2008, 30(2): 78-82. DOI: 10.6052/1000-0992-2006-493
NUMERICAL SIMULATION OF SURFACE SUBSIDENCE CAUSED BY FREEZING METHOD CONSTRUCTION IN TUNNEL[J]. MECHANICS IN ENGINEERING, 2008, 30(2): 78-82. DOI: 10.6052/1000-0992-2006-493
Citation: NUMERICAL SIMULATION OF SURFACE SUBSIDENCE CAUSED BY FREEZING METHOD CONSTRUCTION IN TUNNEL[J]. MECHANICS IN ENGINEERING, 2008, 30(2): 78-82. DOI: 10.6052/1000-0992-2006-493

隧道冻结法施工引起地表沉降的数值分析

NUMERICAL SIMULATION OF SURFACE SUBSIDENCE CAUSED BY FREEZING METHOD CONSTRUCTION IN TUNNEL

  • 摘要: 利用ADINA软件针对某工程实例隧道建立了有限元模型,然后对其开挖过程中地表沉降进行了预测并分析了隧道及冻结壁的应力与位移场,其结果与工程实测值相符;在此模型基础上,对隧道水平局部冻结法施工引起地表变形的相关因素进行了模拟分析,结果表明:冻结法施工时,增加冻结壁厚度对地表沉降影响并不大,而采用扩大冻结壁的范围或减小隧道半径及埋深的方法可有效地控制地表沉降,这对今后的冻结法施工设计有借鉴意义.

     

    Abstract: According to the local horizontal freeing construction ofa metro tunnel, the surface subsidence in the procedure of tunnel excavationis forecasted and the fields of stress and strain in tunnel frozen soil wallis analyzed, the results and the survey of project are equally. Based onthis model, The correlative factors of surface distortion induced by localhorizontal freezing method construction are analyzed. Finally, the resultscan indicate: increasing the thickness of frozen soil wall has a littleinfluence on surface subsidence, but through the method of expanding thearea of frozen soil wall or decreasing tunnel's radius and depth can controlsurface subsidence effectively. The results can provides reference tosimilar construction methods.

     

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