PHYSICAL AND MECHANICAL INDEXES AND CORRELATION ANALYSIS OF CLAY WITH NOTICEABLE STRUCTURES IN ZHANJIANG AREA

The Zhanjiang clay has noticeable structures of effect to the soil's mechanical characteristics can not be neglected.This paper presents the relevance and correlation analysis on the physical and mechanical indexs of Zhanjiang clay.Furthermore,empirical formula of indexes' relations are established.The results show that the basic reasons for poor physical properties and good mechanical properties of Zhanjiang clay are high clay content,clay minerals,gelatinous organic matter,strong adhesive bonded connection and flocculated structure of flaky grains.The spatial variability of clay mechanical index in different regions is substantial.But,the spatial variability of cla physical index is small.The e-、L-、L-e、a1-2-e relationship are linear correlations that are significantly different with other clays in China.Accordingly it can not use the empirical formula developed from other local clays for engineering design.The results presented in this paper provide the basis of reliable design parameter selection for the Zhanjiang area clay foundation.