珠江口外海沉积物(原状样)微结构特征及其物理性质  

Micro-structure features of sediment and its physical characteristics in off-sea of the Zhujiang River mouth

作　　者：卢博[1] 李传荣[2] 

机构地区：[1]中国科学院南海海洋研究所边缘海地质和古环境开放实验室,广州510301 [2]中国科学院南海海洋研究所海洋仪器中心,广州510301

出　　处：《海洋学报》2002年第2期94-100,共7页

基　　金：国家自然科学基金资助项目(4967628);中国科学院广州分院;广东省科学院分析测试基金资助项目.

摘　　要：以第四纪地质土质学的显微结构理论和技术方法,研究珠江口外海沉积物工程地质评价中存在的问题.利用电子探针等微区分析方法深入分析软土结构、微结构的组构和层理以及分类特征,结合原状样物理力学性质参数,研究颗粒接触、堆垒、孔隙等现象与物理性质之间的关系.分析研究表明,珠江口外海沉积物存在着6个微结构类型,其中混合接触结构的底质类具有较高的抗压强度.A micro-structural theory and a technical method of Quaternary geology are used to study engineering geological estimating problems of sediments in off-sea of the Zhujiang River mouth. Soft soil structures, micro-structure and classification characteristics are analysed by using method of electron microscope. On the basis of analysing physical - mechanical characteristic parameters, the relation among grain contact, grain accumultion and porosity with physical - mechanical characteristics of sediments are studied. The study result shows that there are 6 micro-structural types in sediments of off-sea of the Zhujiang River mouth, and among these, the mixed contact structural sediment has higher compressive strength than others.

关 键 词：珠江口 第四纪沉积物 微结构 土工学 土质学 电子探针 

分 类 号：P736.21[天文地球—海洋地质] P642.113[天文地球—海洋科学]