国内学者对我国沿海各地区软土的压缩指数与物理指标的相关性进行了详细的研究，但针对这些统计关系的整体分析以及与国外研究成果的对比仍然比较缺乏。通过对比国外不同地区的压缩指数与液限（8个）、压缩指数与初始孔隙比（7个）、压缩指数与天然含水率（6个）的关系式，发现压缩指数与天然含水率之间的相关性较好，并给出了一个适用范围更广的统计关系。收集我国沿海多个地区的压缩指数与天然含水率统计关系式以及试验数据，对比发现压缩指数与天然含水率的线性关系整体上可以分为两类：南方地区（深圳、广州）具有较低的斜率，约为0.008，与国外的0.01较为接近；而北方地区（天津、连云港、上海）具有较大斜率，约为0.02。这可能与土的结构性有关。还就土样质量对压缩指数与天然含水率统计关系的影响以及Lambe和Whitman提出压缩比与天然含水率统计关系的适用性进行了评价。

The relationships between compression index Cc and physical parameters of soft soil have been studied by many researchers. However, a comprehensive summarization of all these empirical relationships is missing. Eight Empirical relationships of Cc with liquid limit, seven relationships of void ratio e0 and six relationships of natural water content wn from different regions in the world are summairized in this paper. It is found that these Cc-wn relationshps have very similair slopes (about 0.01). Therefore, a general relationship is proposed. The Cc-wn empirical relationships from different Chinese costal areas are compared, and some test data are also collected. It is shown that these Cc-wn relationships can be divided into two categories and their empirical relationships are presented repectively. Southern areas such as Guangzhou, Shenzhen have soils with smaller slope (about 0.008) which is close to the value of 0.01 of soils from foreign regions. Northern areas such as Tianjin, Shanghai, Lianyungang have soils with much larger slope (about 0.02). This difference may relate to the soil structure. This article also evaluates the influence of the soil disturbance on the Cc-wn statistical relationship and discusses the applicability of compression ratio CR with wn relationship provided by Lambe and Whitman for soft soils.