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《Journal of Glaciology and Geocryology》 2018-02
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Study on the frost heaving characteristics of fine sand with high salinity in northern Qinghai

WU Yaping;WANG Ning;PAN Gaofeng;LI Tao;School of Civil Engineering,Lanzhou Jiaotong University;China Railway Liuyuan Group Co.,Ltd.;School of Civil Engineering,Southwest Jiaotong University;Qinghai Local Railway Construction Investment Co .,Ltd.;  
In order to investigate the influence of salt content and water content on the frost heaving properties of saturated fine sand with high salinity,to provide theoretical basis and reference for the design and construction of roads in the high salt content areas,an experimental study on the frost heaving properties of high salt saturated fine sand was carried out by applying frost heaving test under conditions of different water contents and different salt contents. Analyzing the influences of water content and salt content on frost heaving properties of sand specimens,it was found that the water content has little influence on the frost heave starting temperature of the salt sand,and the frost heave starting temperature mainly depends on salt content. When the salt content is 5%,the frost heave starting temperature is the highest,and then decreases with the increase of salt content. The frost heave rate increases with decreasing of temperature. Under the same salt content,the frost heaving ratio increases with increasing of water content in "S"type. When the salt content is less than 5%,the frost heaving ratio will increase with the increase of salt content. When the salt content is more than 5%,the frost heave rate will decrease slowly with the increase of salt content. Frost heave rate varying with water content and salt content can be described by a polynomial.
【Fund】: 青海省交通建设科技项目(512287);; 国家科技支撑计划课题(2014BAG05B05)资助
【CateGory Index】: TU41
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