非饱和黏土的冻胀融沉过程分析  

Analysis of freezing-thawing test process of unsaturated clay

作　　者：吴礼舟[1] 许强[1] 黄润秋[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《岩土力学》2011年第4期1025-1028,共4页Rock and Soil Mechanics

基　　金：国家科技支撑计划项目(No.2008BAC47B01);教育部创新团队(No.IRT0812);地质灾害防治与地质环境保护国家重点实验室自主研究课题(No.SKLGP2009Z011);留学人员择优资助项目资助

摘　　要：通过非饱和黏土的冻胀融沉试验,分析了非饱和黏土在不同含水率(饱和度)和密度情况下冻胀融沉变化特征,探讨了非饱和状态下不同含水率对热传导的影响规律,重点研究了冻胀过程中冻结锋面的移动规律。在一定冻结条件下,冻结锋面移动速度与干密度和含水率有关,尤其是含水率对冻结锋面移动速度产生较大的影响。含水率越大,冻结锋面移动越快。根据该非饱和冻土的试验与分析,旨在为理论研究与工程应用提供参考。The characteristics of unsaturated clay under different water contents and densities are analyzed based on the frost heaving and thawing settlement experiments. Influence of water content on frozen soil thermal conductivity is concerned; and attentions are particularly paid to the movement of freezing front. Moving speed of freezing front is connected with dry density and water content; water content has a significant effect on freezing front movement. Higher water content means faster movement for freezing front. The experiment and analysis of unsaturated frozen soil can provide references for the theoretical study and engineering application.

关 键 词：非饱和冻土 冻胀 融沉 含水率 冻结锋面 

分 类 号：TU445[建筑科学—岩土工程]