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《Chinese Journal of Underground Space and Engineering》 2011-06
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The Experimental Study on Coefficient of Lateral Earth Pressure at Rest for Frozen Soil

Yao Xiaoliang,Qi Jilin,Yu Fan(State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences,Lanzhou 730000,China)  
The coefficient of lateral earth pressure at rest(K0)is an important parameter in soil mechanics.For unfrozen soils,K0 is closely related to dry density,grain size distribution and stress history;for frozen soils,K0 has a close relationship with temperature due to the existence of ice.This paper carried out K0 tests for two kinds of frozen soils with the different conditions of temperature,fine grain size distribution,loading times and dry density.According to the results,K0 is proportional to temperature,fine grains content and loading times and inversely proportional to dry density.Meanwhile,the K0 difference caused by those factors will decrease when the axial pressure increases.In addition,the pressure history effect on K0 will be strengthened as temperature decreases.Hence,in the calculation of frozen ground engineering,the effects of temperature,dry density,grain size distribution and pressure history on K0 must be taken into consideration.
【Fund】: 冻土工程国家重点实验室自主立项课题(O9SF102005);; 国家自然基金项目(40871039);; 中国科学院寒区旱区环境与工程研究所青年基金(Y184B51001)
【CateGory Index】: P642.14
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