季冻区客运专线隧道局部存水冻胀对衬砌力学性能的影响分析

Analysis of Influence of Local Storage Water Frost Heave in Tunnel on Passenger Dedicated Line in Seasonal Frozen Zone on Mechanical Properties of Tunnel Lining

本文依托吉图珲客运专线五峰山隧道,运用局部存水冻胀模型,采用有限元数值模拟技术,对不同积冰位置情况下,局部存水冻胀力对隧道衬砌力学性能的影响进行了分析。研究结果表明:(1)局部存水冻胀将对隧道结构安全造成一定的不利影响,存水位置不同,影响程度有所差别;(2)积冰位置处弯矩值较未积冰时显著提高,当隧道拱顶、拱肩、拱腰处积冰时,隧道安全系数相较于无冻胀力作用时都会降低,且当拱顶处积冰时,安全系数降低更为显著。研究成果可为季冻区隧道抗冻设计及冻害整治提供参考。

Through reconnaissance of 10th of ramadan project and freight railway in Egypt,abundant site and laboratory data are collected,the method to determine the basic physical and mechanical parameters of soil in accordance with Egyptian codes is summarized systematically and fully.In addition,comparison is made between Egyptian codes and Chinese ones,which could provide references for other projects in Egypt.