湛江强结构性黏土的物理力学性质指标及相关性分析
PHYSICAL AND MECHANICAL INDEXES AND CORRELATION ANALYSIS OF CLAY WITH NOTICEABLE STRUCTURES IN ZHANJIANG AREA
-
摘要: 湛江黏土具有较强的结构性,结构性对土的力学特性影响不容忽视。对湛江黏土的物理力学指标的相关性和变异性进行统计分析,建立重要指标间的关系经验公式,这可为湛江地区地基基础可靠性设计的参数选取提供依据。结果表明,湛江黏土富含黏粒、黏土矿物含量高、含胶凝状的有机质成分、强胶结特性以及片状颗粒为主的絮凝结构是导致其具有不良物理性质和良好力学特性指标的根本原因。不同区域黏土的力学指标空间变异性较大,但物理指标变异性较小。e-、L-、 L-e、a1-2-e关系具有线性相关性,但相互关系明显不同于其他地区黏土特征,因此,工程设计中不能简单借鉴其他地区黏土经验公式。Abstract: 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.
下载:
