南海北陆架坡表面沉积物的物理力学性质初探

发布时间：2018-04-28 02:29

本文选题：南海北陆架坡 + 沉积物　；参考：《工程地质学报》2017年06期

【摘要】：南海北部陆坡工程地质环境复杂,并分布有大量油气资源,对该区海底沉积物的物理力学性质的研究是不可缺少的研究工作。本文利用2015年6月于"实验3"号科考船南海北部航次获得的箱式样和柱状样样品,在室内进行了含水率、天然密度、比重、微型扭力十字板以及微型贯入试验和压缩试验,获得了该处沉积物的粒度分布特征及物理力学性质参数。研究表明,南海北陆坡架表层沉积物类型以粉砂质黏土和黏土质粉砂为主,具有较高的含水率和较低的湿密度,抗剪强度、贯入阻力、压缩性等力学性质较差。沉积物的各项土工参数随深度呈现一定规律性的变化,且沉积环境、粒度成分和沉积年代等因素对其存在一定影响。
[Abstract]:The engineering geological environment of the northern slope of the South China Sea is complex and has a large amount of oil and gas resources. The study of the physical and mechanical properties of the seafloor sediments in this area is an indispensable research work. In this paper, the water content and natural density of the box and columnar samples obtained in the northern South China Sea of the "Experiment 3" of the South China Sea were made in this paper. Degree, gravity, micro torsion cross plate, micro penetration test and compression test, the particle size distribution characteristics and physical and mechanical properties of the sediments are obtained. The study shows that the surface sediments of the South China Sea north continental slope are mainly silty clay and clay silt, with high moisture content and lower wet density and shear strength. The mechanical properties such as penetration resistance and compressibility are poor. The various geotechnical parameters of the sediments vary regularly with depth, and the sedimentary environment, grain size composition and deposition age have some influence on it.

【作者单位】：中国海洋大学环境科学与工程学院山东省海洋环境地质工程重点实验室;海洋国家实验室海洋地质过程与环境功能实验室;
【基金】：国家自然科学基金(41427803,41502265) 山东省重点研发计划(2016ZDJS09A03)资助
【分类号】：P736.21;P744.4

【相似文献】