埕岛油田海域沉积物沉积分类向工程分类的转化研究  

Study on the Conversion From Sediment Classification to Engineering Classification for Sediments Collected in the Chengdao Oilfield Sea Area

作　　者：杜星[1] 孙永福[1] 胡光海[1] 宋玉鹏[1] 董立峰[1] 刘晓瑜[1] 周其坤[1] 马彬彬[1] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061

出　　处：《海洋科学进展》2016年第1期121-128,共8页Advances in Marine Science

基　　金：海洋公益性行业科研专项--近海海底地质灾害预测评价及防控关键技术研究(201005005)

摘　　要：通过对埕岛海域长期以来的海洋沉积物工程分类样品进行分析,发现并总结了黏粒质量分数与塑性指数之间存在的关系。在一定程度下,只利用沉积物的粒级组分就可进行工程分类。研究发现:粉土与粉质黏土的黏粒质量分数界限为20%,粉质黏土与黏土的黏粒质量分数界限35%。使用该分类界限,在研究区只使用粒度对沉积物的工程分类命名准确率可达90%以上,做出沉积物分布图准确率在80%以上。This study carried out engineering classification of sediment samples from the Chengdao Oilfield sea area, discovered and summarized the relationship between clay contents and the plasticity index. We further suggested that under certain extent, engineering classification can be achieved by analyzing grain sizes of sediments only. Analysis results showed that the boundary of clay content between silt and silty clay is 20%, and that between silty clay and clay is 35%. By using this method, the accuracy rate for engi- neering classification of sediments can be up to 90%, and that for making the sediment-type distribution map is over 80%.

关 键 词：埕岛油田 工程分类 沉积分类 黏粒质量分数 塑性指数 

分 类 号：P736.21[天文地球—海洋地质]