土体冻融过程中渗流场应力场温度场耦合作用机理研究

Coupled mechanism for seepage,stress,temperature field of permafrost during freezing-thawing process

摘要: 土体冻融过程中的耦合作用机理研究是求解冻土工程问题的基础。为了全面了解冻土体中水、热、力耦合作用行为,本文从各自耦合过程特征出发,从数学建模和数值求解的角度对渗流场、应力场、温度场耦合作用机理进行了探讨,确定了土体冻融过程中三场之间的耦合作用关系和求解冻土工程问题的计算方法,为冻土边坡工程稳定性评价和寒区防灾、减灾工作提出了一个新的研究课题。

Abstract: Coupled mechanism for permafrost is a basis for solving permafrost engineering problems.To understand thoroughly this behavior of coupled seepage,stress and temperature field,from respectively coupled process characteristics and mathematic model building point,coupled mechanism is discussed in the paper. Coupled relationship among three fields and solving method for permafrost engineering problems are determined.This is a new task for evaluating permafrost slope stability and preventing disaster in cold regions.