CAJ | 학술논문

为掌握上海洋山深水港四期工程底质泥沙的分布与变化特征，对四期工程近海区开展了柱状取样工作。沉积物柱状取样工作分析结果表明，四期工程水域共有4种沉积类型，即砂质粉砂、砂-粉砂-粘土、粉砂和粘土质粉砂，其中粉砂占全部样品的66%，其次是砂质粉砂占21.74%。工程水域沉积物中值粒径在0.085~0.0491 mm变化，平均为0.028 mm；柱状样各层粒径比较，表层物质最细，平均中值为0.026 mm，自上而下依次增大；与已建成的港区水域相比，四期工程水域底质表层泥沙略粗于大、小洋山通道水域，分选程度略好于大、小洋山通道水域，物质组成基本相同，仅粉砂含量增高。
위장악상해양산심수항사기공정저질니사적분포여변화특정，대사기공정근해구개전료주상취양공작。침적물주상취양공작분석결과표명，사기공정수역공유4충침적류형，즉사질분사、사-분사-점토、분사화점토질분사，기중분사점전부양품적66%，기차시사질분사점21.74%。공정수역침적물중치립경재0.085~0.0491 mm변화，평균위0.028 mm；주상양각층립경비교，표층물질최세，평균중치위0.026 mm，자상이하의차증대；여이건성적항구수역상비，사기공정수역저질표층니사략조우대、소양산통도수역，분선정도략호우대、소양산통도수역，물질조성기본상동，부분사함량증고。
In order to master the distribution and change characteristics of the seabed sediment of the 4th phase project area in Shanghai Yangshan Deepwater Port, columnar sampling was carried out. The analysis results of columnar samples demonstrate that:there are four sedimentary types in the 4th phase project area, such as sandy silt, sand-silt-clay, silt and clayey silt. About 66%of all samples is silt, and 21.74%of all samples is sandy silt. The median size of sediment is 0.085~0.049 1 mm, and the average value is 0.028 mm. In comparison of each layer of columnar samples, the surface layer material is the finest. Average value of median size is 0.026 mm, and it increas-es from upper layer to lower layer gradually. Compared with water area of the completed port district, the surface lay-er material of the 4th phase project area is coarser than that in channel between Dayangshan and Xiaoyangshan is-lands, and the sorting degree is slightly better. Component of sedimentary type is basically the same, however, the content of silt is higher.