液化后土体的流态化特性研究进展

State of Art of Fluidization Behavior of Postliquefied Soils

摘要:

简述近年来对液化后土体流体性质的认识过程,分析液化后土体的流态化现象及其发生机制,重点介绍目前常用于液化变形分析的宾汉姆模型和假塑性模型的相关研究成果.指出应结合工程实践,开展针对液化土体的流体动力学特征的研究,修正相关流体模型;提出在液化变形研究中,未来发展应该考虑建立基于固液气多相流理论的综合分析模型.

Abstract:

The paper presents a review of the research developments of fluidization behavior of postliquefied soils and a discussion on the phenomenon and mechanism of fluidization.Then,two constitutive models adopted in liquefaction analysis,the pseudoplastic and the Bingham models,are introduced.Also,a further study is made on hydrodynamical characteristics of liquefied soils to modify the fluidmodels on the basis of the engineering practice.Finally,a solidliquidair multiphase flow model is proposed to be developed in a future unified analysis of liquefied soils.