天然结构性软粘土应力历史的确定  

Determination of Stress History of Natural Structural Soft Clay

作　　者：王国欣[1] 肖树芳[2] 黄宏伟[1] 

机构地区：[1]同济大学地下建筑与工程系,上海200092 [2]吉林大学建设工程学院,吉林长春130026

出　　处：《同济大学学报（自然科学版）》2005年第8期1007-1010,共4页Journal of Tongji University:Natural Science

基　　金：国家自然科学基金资助项目(40172092);国家博士后科学基金资助项目(2003034276)

摘　　要：土的天然结构性软粘土是一种具有较强结构性的土,通过传统的求取土先期固结压力的方法,是无法获得其真正先期固结压力的.所以为求得土真正先期固结压力,采用了重塑土样,用还原法确定出土在没有结构强度影响下的压缩曲线,并求得相应的先期固结压力.同时定性分析了杭州天然结构性软粘土的应力历史,与定量计算结果进行了比较,两者所得结果是一致的.由此为求取具有较强结构性的土的先期固结压力提供了一种新的思路和方法.Natural structural soft clay is a strong structural soil, therefore, the real preconsolidation pressure won＇ t be obtained by traditional method. Remoulded clay samples and reduced method are used in this paper to determine compression curves of clay without taking account of the effect of structural strength, and preconsolidation pressures are obtained. Meantime, according to qualitative analysis, stress history of natural structural soft clay in Hangzhou is analyzed and satisfactory results are achieved in comparison with the quatitative analysis. Thus it provides a new idea and method to determine preconsolidation pressure of strong structural soils.

关 键 词：软粘土 应力历史 先期固结压力 超固结比 

分 类 号：TU431[建筑科学—岩土工程]