摘要
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。
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 .
出处
《水利与建筑工程学报》
2014年第3期121-124,共4页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金资助(41262012)
新疆水利水电工程重点学科基金资助(xjzdsk-2002-10-05)
新疆水文学及水资源重点学科基金资助(xjswszyzdxk20101202)
关键词
天然盐渍土
冻融循环
内摩擦角
黏聚力
干密度
natural saline-soil
freeze-thaw cycles
internal friction angle
cohesion
dry density
