摘要
本文利用轻型动力触探实验对沙滩的板结程度进行了初步的测定,并在此基础上原位测定了三亚湾不同深度的海沙的粒径分布,利用线性回归方程初步探讨了不同粒度的海沙对轻型动力触探锤击数(N_(10))的贡献.结果表明:粗细不同的海沙在不同层位上有较大差异,表层0-30 cm大部分粒级的海沙均对N_(10)表现出正贡献,其中极细砂贡献最大;30-60cm粗砂和极细砂对N_(10)表现出正贡献,其余粒级的砂则为负贡献,而60-90 cm与30-60 cm刚好相反,粗砂和极细砂对N_(10)表现出负贡献,其余粒级的砂表现为正贡献.初步可以说明三亚湾表层海沙硬化的现象与极细沙增多有关.
Based on the light dynamic penetration test and the cone penetration test, three kinds of particle size distribution located in different depths were determined in the paper. According to the linear regression anal- ysis, different size characteristic contributions to blow count N10 were briefly discussed. The experimental results showed that blow count N10 makes difference between the coarse and fine particles. In the surface of 0 -30 cm depth, a majority of sands of granule size positively contribute to blow count N10, among which extremely fine particles make a greater contribution. In the surface of 30 -60 cm depth, the coarse and fine particles positively contribute to blow count N10, while particles of other sizes make a negative.contribution. In the surface of 60 -90 cm depth, the coarse and fine particles negatively contribute to blow count N10, while particles of other sizes make a positive contribution. The preliminary study indicated that sand hardening in superficial sediments of the Sanya Bay, Hainan Island correlates with the increase of special fine sand particles
出处
《海南热带海洋学院学报》
2017年第2期30-33,共4页
Journal of Hainan Tropical Ocean University
基金
海南省科技厅科技兴海专项(XH201419)
海南省大学生创新创业训练计划项目(20150130)
琼州学院青年基金项目(QYQN201231)
关键词
沙滩
动力触探
沙粒粒度
sand beach
light dynamic penetration test
grain diameter.
