中文摘要：

压缩指数Cc是土体变形特征的一个重要指标,一般通过固结试验获得,需要耗费较长的时间以及大量人力物力,因此通过其他基本物理指标（天然含水率wn、初始孔隙比e0、液限wL）来推算压缩指数Cc是一个快捷有效的方法。从上海地区钻孔得到第2~6层土的原状土样进行固结试验,并结合多个地点的勘察报告数据,发现wn和e0具有较高的线性相关性,但wn与wL间的相关性不明显。考虑到wn相比e0更容易得到,选用wn来建立与Cc的关系式。研究认为,常用的线性关系不适用于上海黏土中含水率wn大于45%的情况,提出了指数函数式（8）。该函数还可适用于中国东部沿海其他地区的黏土。

英文摘要：

Compression index obtained from the oedometer test is required for calculation of ground settlements. However, oedometer test is very time consuming and expensive, and requires a lot of experience for obtaining undisturbed soil samples from the field. Equation needs to be developed in order to predict compression index using index properties of soil which are relatively easier to obtain. Intact samples are taken in Shanghai area using thin-wall samplers, and are conducted by oedometer tests. The data used for the study consist of current and existing laboratory results from several geotechnical investigation reports. Natural water content has good linear correlation with initial void ratio, but not obvious with liquid limit. Since water content is more easier to obtain than initial void ratio, it is used to predict compression index. Commonly used linear equation is not suitable for Shanghai clay, especially when water content is higher than 45%. Finally, an exponential function involving the water content is recommended to predict compression index of upper Shanghai clay for preliminary engineering design. The function is also verified by compression index of clays at other places in coastal area of eastern China.