摘要
用物理(声学的、工程地质的、扫描电子显微镜)等技术方法,综合分析了沉积物结构特征和工程力学性质,研究了颗粒接触、堆垒、孔隙等现象与物理性质之间的关系,得出了沉积物声学物理参数和应力-应变性质之间的关系。结果表明,南海北部大陆架海底沉积物有6种结构类型,其中混合接触结构类型的沉积物具有较高的抗压强度和声速,浅层海底存在着高、低声速分层的中尺度结构。
By using some physical methods (acoustical, geotechnical and electron microscopic), the authors have analysed the structural characteristics and mechanic propeties of sediment, the micro-structure and classification characteristics of sediment particles, and on the basis of physical-mechanical characteristic parameters, the relation among grain contact, grain accumulation, porosity and physical-mechanical characteristics of sediment, and obtained the sound physical properties and the stress-strain relationship of sediment. The study result shows that there are 6 structural types in the sediments on the shelf seabed of the northern South China Sea, and that the mixed contact structural sediment has a higher compressive strength and higher sound velocity than the others. Seabed surface sediment has the meso-scale structure with a high sound velocity layer and a low sound velocity layer.
出处
《海洋工程》
CSCD
北大核心
2004年第3期48-55,共8页
The Ocean Engineering
基金
国家自然科学基金资助项目(40176012)
关键词
南海北部大陆架
海底沉积物
结构特征
工程地质
声学物理
northern shelf of the South China Sea
seabed sediment
structural characteristics
soil mechanics
sound physical properties
