摘要
土中水是土体的重要组成部分,其与土颗粒的结合形态也是影响土体物理力学性质的重要因素。通过不同含水率下土体的收缩试验和袖珍贯入试验,研究了土中水的形态对土体收缩性及贯入强度的影响规律。结果表明:土中水的结合形态对土体收缩性及贯入强度有显著影响,最大吸着水含量是一个临界点。土体初始含水量高于临界值时,随含水量的增加,土体收缩变形急剧递增,贯入强度递减;土体初始含水量低于临界值时,随含水量的减少,土体收缩变形变化微小,贯入强度递减。
Water is an important component of soil, and its formation is also a significant factor for the influence on physical and mechanical properties of soil. The influence rule of water formation on mechanical properties of soil is studied by shrinkage test and miniature penetration test with soils of different water content. The results show that the water formation has remarkable influence to the mechanical properties of soil, and the largest content of hygroscopic water is a critical point. When the initial water content is higher than the largest content of hygroscopic water, the shrinkage strain increases remarkably and penetration intensity decreases progressively along with the increasing of water content. When the initial water content is lower than the largest content of hygroscopic water, the shrinkage strain has subtle change and penetration intensity decreases progressively along with the decreasing of water content.
引文
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