【摘要】 利用有限差分程序FLAC2D对某地铁冻结法施工的过程进行数值模拟,对冻土壁温度场的扩展、冻结引起的地表隆起及开挖造成的地表沉降等问题进行了分析研究,为预测土层的膨胀、确定合理的冻结圈厚度及温度,了解冻结法施工过程中隧道周边位移和应力场的变化提供了有效依据,并得出了一些有益的结论以用于同类工程的参考。更多还原

【Abstract】 Using the finite differential program FLAC^2D,the numerical simulation on the freezing process of a metro is progressed.The spreading of the temperature field of frozen soil wall,the rising of the ground surface that induced by freezing and the settlement that caused by excavation are analyzed and researched respectively.The results provide effective supports to forecast the expansion of soil layer,confirm reasonable thickness and temperature of the freeze ringing and know the transformation of the displacement field and the stress field during the freezing process.Of course,some useful conclusions are gained to be references of similar projects.更多还原