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
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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.Abstract: 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,microstructure 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.
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Key words:
- Zhujiang River mouth /
- Quaternary geological sediments /
- micro-structure /
- soil mechanics
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