| 波浪作用下黄河口粉土液化与振荡层形成试验研究 |
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| 引用本文： | 刘红军,刘莹,张民生.波浪作用下黄河口粉土液化与振荡层形成试验研究[J].中国海洋大学学报(自然科学版),2009,39(5). |
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| 作者姓名： | 刘红军 刘莹 张民生 |
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| 作者单位： | 1. 中国海洋大学海洋环境与生态教育部重点实验室,山东,青岛,266100;中国海洋大学环境科学与工程学院,山东,青岛,266100
2. 中国海洋大学环境科学与工程学院,山东,青岛,266100 |
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| 基金项目： | 山东省自然科学基金项目(Y2007E07);;国家自然科学基金项目(40606020)资助 |
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| 摘 要： | 通过室内水槽试验,观察波浪作用下土体产生的现象,分析了土体内孔隙水压力的变化及波浪作用后土体粒度组成变化特征,研究了波浪荷载作用下黄河口粉土液化和"振荡层"的形成过程。试验及讨论结果表明:在波浪作用下,上层粉土体大部分时间处于液化状态;由液化土形成的振荡土层与下部土层之间形成"W"形的滑动面,振荡土层的厚度随着波浪作用时间的增加而变小;在波浪的振动和孔隙流体的共同作用下,土颗粒重新排列,细粒物质向上迁移,土体底部土颗粒粒径较为粗大,振荡层范围内土颗粒粒径组成相似,粒径分布范围较小;其内部孔压比随深度和波浪作用次数的增加而较少,土体内部积累的超孔压逐渐消散,海床土体逐渐趋于稳定。
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| 关 键 词： | 振荡层 水槽试验 液化 孔压 液化比 |
Study on Liquefaction of Silty Soil and the Development of Surging Layer Under Wave Actions at Yellow River Estuary |
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| LIU Hong-Jun,LIU Ying,ZHANG Min-Sheng.Study on Liquefaction of Silty Soil and the Development of Surging Layer Under Wave Actions at Yellow River Estuary[J].Periodical of Ocean University of China,2009,39(5). |
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| Authors: | LIU Hong-Jun LIU Ying ZHANG Min-Sheng |
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| Institution: | Ocean University of China 1.Key Lab of Marine Environmental Science and Ecology;Ministry of Education;2.College of Environmental Science and Engineering;Qingdao 266100;China |
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| Abstract: | Experiments are conducted in a wave flume to study liquefaction of silty soil and development of "surging layer" under wave actions at the Yellow River Estuary,in addition the changes of pore pressure and granularity content are analyzed to help study the mechanisms.Results indicate that under wave actions superficial silty soil is in liquefaction for most of the times,which leads to a "W"-shaped sliding interface between the oscillatory layer and the underlying layer;thickness of the oscillatory layer decr... |
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| Keywords: | surging layer wave flume experiment liquefaction pore water pressure liquefied ratio |
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