岩石冻胀力研究综述

    Review on research of rock frost heaving force

    • 摘要: 岩石冻胀过程中的水分迁移研究是冻岩力学研究的核心。首先阐释了薄膜水迁移理论、毛细理论、分凝冰理论3种主流的水分迁移理论,对3种理论的应用情况进行了介绍。从原位冻结、水分迁移冻结产生冻胀力的角度入手,对冻胀力解析模型研究、试验研究、数值模拟研究3个方面的研究进展进行概述。分别就解析模型中单一椭圆形裂隙冻胀力及寒区隧道3类典型冻胀力的计算、试验研究中冻胀力量值的影响因素及冻融循环中冻胀力的演化特征、数值模拟中单裂隙冻胀力及寒区隧道冻胀力模拟问题,展开了分析并指出了存在的不足之处。提出在冻胀力的解析模型研究和数值模拟研究中应充分考虑多种情况的耦合作用和水分迁移过程,以及在试验研究中开展测量方法的改进等研究建议。

       

      Abstract: The theoretical study on water migration during a frost heaving process of rock is a core technical problem in the study of frost rock mechanics.Firstly we explain three mainstream water transfer theories: film water migration theory, capillary water migration theory and segregated ice theory, and demonstrate the application of the three water transfer theories.Then from the perspective of frost heaving force caused by in-situ freezing and water migration freezing, we analyzed the research progress and shortcomings of analytical model, experimental research and numerical simulation of frost heaving force.For analytical research, we discuss the calculation models of single elliptical crack frost heaving force and calculation of three kinds of typical frost heaving forces of tunnels in cold area.For experimental research, we discuss the influencing factors of frost heaving force value and the evolution characteristics of frost heaving force in freeze-thaw cycle.For numerical research, we discuss the numerical simulation of single crack frost heaving force and tunnel frost heaving force simulation in cold area.For all the three fields we point out the shortcomings in current research.It is proposed that the coupling effect and water migration process of various cases should be fully considered in the study of analytical model and numerical simulation, and the improvement of measurement method in the experimental study of frost heaving force should be strengthened.

       

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