A certain depth of the natural soline-soil in a building of Lop Nur was applied for the indoor routine tests ,and the variation laws of the natural soline-soil under repeated freeze-thaw cycles with a certain density and water content were found and studied .The test results suggest that after the repeated freeze-thaw cycles of the soil specimen ,its cohesion in-creases first and then decreases ,and its internal friction angle shows the continuously increasing trend ;With the increase of freeze-thaw cycles ,the dry density of the natural saline-soil deereases continuously ,and its void ration increases .%取罗布泊镇某建筑一定深度天然盐渍土进行室内常规试验，控制天然盐渍土在一定密度和一定含水率状态下进行多次冻融循环，找寻多次冻融循环条件下天然盐渍土强度变化规律。试验结果表明：无论采用击样法还是击实法制备的土样在经历多次冻融循环后，其黏聚力呈现先增大后降低的趋势，而内摩擦角呈现不断增大的趋势；随着冻融循环次数的增加天然盐渍土的干密度不断减小，孔隙比不断增大。
展开▼
