粉质土海岸微地貌形成及泥沙问题的工程地质分析

许国辉; 王欣; 刘会欣; 杨俊杰; 刘红军

doi:10.3724/SP.J.1140.2010.02043

粉质土海岸微地貌形成及泥沙问题的工程地质分析

许国辉^1,2,
王欣¹,
刘会欣¹,
杨俊杰^1,2,
刘红军^1,2

1 中国海洋大学环境科学与工程学院, 青岛 266100;
2 中国海洋大学海洋环境与生态教育部重点实验室, 青岛 266100

基金项目:

国家自然科学基金项目(40606020)

山东省自然科学基金项目(Y2007E08)

详细信息

作者简介:
许国辉(1972-),男,博士,研究方向为海洋工程地质、海岸工程环境,E-mail:xuguohui@ouc.edu.cn

中图分类号: P736.2
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- 文章访问数: 1808
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出版历程
- 收稿日期: 2009-07-12
- 修回日期: 2009-09-24

ENGINEERING GEOLOGY ANALYSIS ON FORMATION OF MICRO-TOPOGRAPHY AND PROBLEMS OF SEDIMENT MOVEMENT AT SILTY COAST AREAS

1 College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China;
2 Ministry of Education Key Lab of Marine Environmental Science and Ecology, Ocean University of China, Qingdao 266100, China

摘要

摘要: 通过对渤海湾粉质土海岸中的黄河水下三角洲的塌陷凹坑地貌形成、埕岛海域海底电缆中断、黄骅港外航道泥沙骤淤、东营港航道开挖试验段淤积等问题进行原因分析,结合该类海岸粉质土在波浪作用下的动力特性,认为风暴期间在强烈的波浪循环荷载作用下,粉质土在趋于液状化过程中强度降低,被波浪剪切形成振荡滑动,导致运动泥沙的异常增量。因此,在研究粉质土海岸泥沙运动问题中,应注意考虑由于海底粉质土的工程地质特性而造成的泥沙侵蚀或淤积量的异常变化。
- 粉质土海岸 /
- 泥沙运动 /
- 土体强度弱化 /
- 工程地质
Abstract: There are many engineering problems at silty coast areas in the Bohai Sea,such as the formation of collapse depressions at the Yellow River subaqueous delta, the breaks of marine cables at the Chengdao sea area, the drastic sand siltation of the open channel of Huanghua harbor, and the sand siltation of the Dongying harbor experimental channel. Based on the cause analysis of these problems and the dynamic characteristics of silty soil under storm waves, we propose that the strength of silty seabed deceases while it is approaching liquefaction due to storm waves, and the seabed is sheared and oscillated under waves, resulting in drastic increase of the mobile sediment. As a result, the influence of engineering geology characteristics of silty soil should be taken into account when we research the problems of sediment movement of silty coast areas.
- silty coast /
- sediment movement /
- soil strength decrease /
- engineering geology

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参考文献(46)

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