温降时之盐分重分布及盐胀试验研究  

Salt Redistribution and Heave of Saline Soil During Cooling

作　　者：陈肖柏[1] 邱国庆[1] 王雅卿[1] 盛文坤[1] 

机构地区：[1]中国科学院兰州冰川冻土研究所

出　　处：《冰川冻土》1989年第3期231-238,共8页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金;甘肃省交通厅的部分资助

摘　　要：盐渍土广泛分布于西北、内蒙、东北及山东等地区,由于温差变化与蒸发作用,土壤水溶液中的盐分将部分离析出并结晶,同时部分盐分将从暖区向冷区、自湿区向干区迁移、聚集且结晶,导致土体积膨胀,即盐胀(亦称松胀)。土的盐胀作用给土木、水利、道路、机场等工程带来特殊的工程地质问题。本文通过试验研究,讨论了降温时土中盐分的重分布及盐胀现象,盐胀的不可逆性及激烈盐胀温度区,期望对工程防治盐胀病害有所见益。Heavy saline soil is widely distributed in the Northwest, Inner Mongolia, North-east and Shandong provience in China. Salt will be crystallized from soil solution and migrated from warm side to cold side or from wet side to dry side during cooling or vaporizing processes respectively. Consquently, salt heave will be. occured while cooling, resulting in the damage of! road, runway, buildings and hydraulic structures. In common case, crystal susceptibility of saline loam in much stronger than that of saline c...

关 键 词：盐渍土 盐分重分布 盐胀 

分 类 号：P642[天文地球—工程地质学]