冻土抗拉强度与冻温及含水率关系的试验研究

通过用CBR-l型承载比试验仪实测不同冻结温度和不同含水率下冻土的强度，建立了抗拉强度与冻结温度和含水率关系的数学模型，并进行了科学的分析，找出之间变化的规律：含水率在14％-25％且一定时，温度在0℃— -20℃内抗拉强度随着冻结温度的降低而逐渐增加，在-20℃达到抗拉强度最大值；而冻结温度在-20℃以下，抗拉强度随...

An Experimental Study on the Relationship between Tensile Strength and Temperature and Water Ratio of Frozen Soil

Abstract:With the practical measurement of frozen soil strength under different frozen temperatures and water ratios by the CBR-1 bearing ratio tester,the relationship between tensile strength and frozen temperature and water ratio is built,and their regularities are developed. When the water ratio lies between fourteen and twenty-five percent,the tensile strength is gradually increased accompanied with the reduction of temperature when between zero and twenty degrees below zero,the strength reaches its maximum. When the temperature is below twenty degrees below zero,the tensile strength is lowered with the reduction of frozen temperature. When the temperature is between one degree below zero and twenty-four degrees below zero,it is also lowered with the increasing water ratio;when the temperature is below five degrees below zero and the water ratio is more than seventeen percent,the strength is slowly reduced with the increase of water ratio. This conclusion will provide more accurate design and construction basis for the engineering construction in the cold area.