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力学与实践 ›› 2008, Vol. 30 ›› Issue (2): 78-82.doi: 10.6052/1000-0992-2006-493

• 应用研究 • 上一篇    下一篇

隧道冻结法施工引起地表沉降的数值分析

张向东 孙国志   

  1. 辽宁工程技术大学 土木建筑工程学院 辽宁阜新 123000 辽宁工程技术大学 土木建筑工程学院 辽宁阜新 123000
  • 收稿日期:2007-01-04 修回日期:2007-09-18 出版日期:2008-04-08 发布日期:2008-04-08

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

  • Received:2007-01-04 Revised:2007-09-18 Online:2008-04-08 Published:2008-04-08

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 of a metro tunnel, the surface subsidence in the procedure of tunnel excavation is forecasted and the fields of stress and strain in tunnel frozen soil wall is analyzed, the results and the survey of project are equally. Based on this model, The correlative factors of surface distortion induced by local horizontal freezing method construction are analyzed. Finally, the results can indicate: increasing the thickness of frozen soil wall has a little influence on surface subsidence, but through the method of expanding the area of frozen soil wall or decreasing tunnel's radius and depth can control surface subsidence effectively. The results can provides reference to similar construction methods.