| 波浪作用下埕岛海域海底土液化分区 |
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| 引用本文： | 冯秀丽,刘晓瑜,董立峰.波浪作用下埕岛海域海底土液化分区[J].中国海洋大学学报(自然科学版),2007,37(5):815-818,846. |
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| 作者姓名： | 冯秀丽 刘晓瑜 董立峰 |
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| 作者单位： | 1. 中国海洋大学,山东,青岛,266100
2. 国家海洋局第一海洋研究所,山东,青岛,266061 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 根据埕岛海域表层沉积物特征,结合该区的波浪实测资料推算的波浪要素,利用动三轴实验得到研究区土体在循环荷载作用下孔隙水压力的增长与振动次数的关系,计算研究区内海底土层的液化可能性和液化所需的时间,并根据土体在不同水深情况下达到液化所需的时间对研究海域进行了液化分区。结果显示,7-8 m等深线之间的海底土体由于受到波浪破碎作用的影响,最易发生液化,液化影响深度也最深,自该海域向近岸和远海,液化可能性降低;土层埋深为2.5 m以浅时,研究区大部分区域液化可能性为高,而到埋深为4 m时土层液化可能性明显降低。
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| 关 键 词： | 埕岛海域 波浪作用 液化 分区 |
| 文章编号： | 1672-5174（2007）05-815-05 |
| 修稿时间： | 2007-04-232007-06-26 |
Liquefaction Regions of Seafloor Soil Under Wave Loading in the Chengdao Area |
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| FENG Xiu-Li,LIU Xiao-Yu,DONG Li-Feng.Liquefaction Regions of Seafloor Soil Under Wave Loading in the Chengdao Area[J].Periodical of Ocean University of China,2007,37(5):815-818,846. |
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| Authors: | FENG Xiu-Li LIU Xiao-Yu DONG Li-Feng |
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| Institution: | 1. Ocean University of China, Qingdao 266100, China; 2. First Institute of Oceangraphy, SOA, Qingdao 266061, China |
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| Abstract: | Based on sediment property, real-time wave parameters, and the relationship between pore water pressure and vibration time derived from dynamic triaxial test, the liquefaction time of the seafloor soil is calculated; furthermore, liquefaction potential regions in the study area are plotted according to the liquefaction time of each region. It turned out that the seabed between 7 m to 8 m bathymetric lines was the most probable liquefaction area and the liquefaction probability of the seabed appeared to decline from in shore areas to offshore eas. Meanwhile, the liquefaction probability of the study area is mostly high when the soil depth is no more than 2.5 m, while it is quite low when the soil depth is 4m. The conclusions reached in this study may provide a scientific basis for marine engineering design and construction. |
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| Keywords: | wave pore water pressure liquefaction liquefaction region |
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