膨胀土判别与分类方法探讨  

Study on approach to identification and classification of expansive soils

作　　者：陈善雄[1] 余颂[2] 孔令伟[2] 郭爱国[2] 刘观仕[2] 

机构地区：[1]华中科技大学土木工程与力学学院,武汉430072 [2]中国科学院武汉岩土力学研究所,武汉430071

出　　处：《岩土力学》2005年第12期1895-1900,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.50279050)

摘　　要：膨胀土的胀缩等级评判是进行膨胀土处治的首要任务,开展膨胀土的判别与分类方法探讨具有重要意义。对现有膨胀土判别与分类方法进行了评价,对反映和表征膨胀土胀缩机理和特性的指标进行了深入探讨,提出了以能充分反映和表征膨胀土胀缩机理和特性的液限、塑性指数、自由膨胀率、小于0.005mm颗粒含量、胀缩总率等5个指标作为膨胀土的判别指标,建立了一种新的膨胀土判别与分类方法,并通过试验进行了验证。新的膨胀土判别与分类方法具有准确度高、易操作的优点。The identification and classification of expansive soils is the problems that should be firstly solved in construction in expansive soil region. The existing approach to identification and classification of expansive soils has been evaluated. The indices that can reflect and characterize swell-shrink mechanism and property were analyzed. The analysis indicates that 5 indices such as liquid limit, plastic limit, clay particles, free swell ratio, swell-shrink total ratio can reflect and characterize swell-shrink mechanism and property; hereby these 5 indices have been suggested as identification and classification indices of expansive soils; and a new approach of 5- indices including liquid limit, plastic limit, clay particles, free swell ratio, swell-shrink total ratio, for identification and classification of expansive soils has been established. The new approach to identification and classification of expansive soils has been validated and it has been shown that the new approach is easy and reliable.

关 键 词：膨胀土 判别与分类 膨胀潜势 

分 类 号：TU443[建筑科学—岩土工程]