海陆交互相下粘性土的性状研究

长江口北侧海陆交互相沉积粘性土具有粘粒与粉粒交替形成的互层层理结构特征及粉粒含量高的粒度成分特征。且表现出物理性质指标与力学性质指标互不吻合的工程特性。运用多元统计理论中主成分分析原理，分析了海陆交互相沉积粘性土常规物理性质指标反映其工程特性的能力。研究结果表明：将亚砂土隶属于粘性土范畴是不科学的，同时运用液性指数判别其物理稠度状态及推断其工程特性的方法存在不尽合理之处。

Research of characteristics of the sedimentary clay in the alternate marine and terrigenous environment

The sedimentary clay in the alternate marine and terrigenous environment of the north side of the Yangtze River estuary is possessed of the interbedded structure by interlacing the clay and silt, as well as the granular composition of high silt content. And its physical property indexes are in-consistent with its mechanical property indexes. The principal component analysis of multi-statistic theory is applied to analyze the potential of engineering characteristics through the routine physical indexes. The results indicate that it is not scientific that sandy loam is subjected to clay category; and the methods is not all reasonable estimating physical consistency state of sandy loam with relative water content and inferring its engineering characteristic.