| XU Yuanqin,LI Ping,LI Peiying,DU Jun,LIU Lejun,GAO Wei,LIU Jie. 2017. The difference analysis of physical-mechanical properties of sediments in the central South Yellow Sea and Zhe-Min coastal area in China. Acta Oceanologica Sinica, 36(7):77－85 |
| The difference analysis of physical-mechanical properties of sediments in the central South Yellow Sea and Zhe-Min coastal area in China |
| 浙闽近岸与南黄海中部沉积物物理力学性质的差异性分析 |
| Received:May 31, 2016 Revised:October 08, 2016 |
| DOI：10.1007/s13131-017-1000-8 |
| Key words:sediment Zhe-Min coastal area central South Yellow Sea physical-mechanical properties difference analysis |
| 中文关键词: 沉积物 浙闽近岸 南黄海中部 物理力学性质 差异性分析 |
| 基金项目:The NSFC-Shandong Joint Fund for Marine Science Research Centers under contract No. U150640007; the Natural Science Foundation of Shandong Province of China under contract No. BS2015HZ009; the National Natural Science Foundation of China under contract No. 41506071. |
| Author Name | Affiliation | E-mail | | XU Yuanqin | Key Laboratory of Marine Sedimentology and Environmental Geology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China | | | LI Ping | Key Laboratory of Marine Sedimentology and Environmental Geology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China | | | LI Peiying | Key Laboratory of Marine Sedimentology and Environmental Geology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China | | | DU Jun | Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
Research Center for Islands and Coastal Zones, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | dujun@fio.org.cn | | LIU Lejun | Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China
Marine Engineering Environment and Geomatic Center, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | | GAO Wei | Key Laboratory of Marine Sedimentology and Environmental Geology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China | | | LIU Jie | Key Laboratory of Marine Sedimentology and Environmental Geology, The First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China
Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China | |
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| Abstract: |
| The difference analysis of physical-mechanical properties of muddy sediments is made in the central South Yellow Sea and the Zhe-Min (Zhejiang Province to Fujian Province of China) coastal area. The results show that sediments in the two regions are both dominated by mud. There are perfect negative power function correlations between the water content and the density, the compression coefficient and the compression modulus; a good positive power function correlation between the liquid limit and the plastic limit, a perfect positive linear correlation between the water content and the void ratio, and a perfect polynomial function correlation between the miniature vane shear strength and the pocket penetration resistance. In general, compared with sediments in the Zhe-Min coastal area, sediments in the central South Yellow Sea possess high water content, high void ratio, low density, high plasticity, high compressibility, low shear strength. The causes of the differences between physical-mechanical properties of sediments are analyzed from the topographic features, material sources, hydrodynamic conditions, deposition rate, and material composition. Compared with the Zhe-Min coastal area, the central South Yellow Sea is far from the Mainland and low-lying; has poor hydrodynamic condition; the materials diffused to the area are less and dominated by fine clay, have the high content of smectite and organic matters. These factors lead to sediments of the central South Yellow Sea has the higher water content, the higher plasticity, the lower density, and the lower strength than sediments in the Zhe-Min coastal area. |
| 中文摘要: |
本文对浙闽近岸和南黄海中部泥质区沉积物的物理力学性质，分别从基本物理性质、水理性质及力学性质进行对比分析，发现两个区域沉积物均以淤泥为主，含水率与密度、压缩系数与压缩模量均呈良好的幂函数负相关性，液限与塑限呈良好的幂函数正相关性，含水率与孔隙比呈较好的线性正相关，十字板剪切强度与微型贯入阻力呈较好的多项式函数关系。总体来说，南黄海中部泥质区沉积物相对于浙闽近岸泥质区沉积物具有含水率高、孔隙比大、密度小、塑性高，压缩性大，抗剪强度低等特征。
从地形特征、物质来源、水动力条件、沉积速率和物质组成等方面进行两个区域沉积物物理力学性质差异性的成因分析。结果显示，与浙闽近岸相比，南黄海中部离陆较远、地势低洼、水动力条件较弱，能够扩散至此的物质较少并以极细的粘粒物质为主，沉积物中的蒙脱石和有机质含量高。这些因素使得南黄海中部沉积物的含水率高，塑性大，密度低，强度低。 |
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