| 辽河三角洲潮道软土及其工程灾害研究 |
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| 引用本文： | 魏宏伟.辽河三角洲潮道软土及其工程灾害研究[J].海岸工程,2003,22(2):97-103. |
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| 作者姓名： | 魏宏伟 |
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| 作者单位： | 中国石油辽河油田浅海石油开发公司,辽宁,盘锦,124010 |
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| 摘 要： | 辽河三角洲潮道沉积物为软弱淤泥质土，管桩在波流荷载作用下的弹性变形或振动，可以导致潮道软土强度衰减并发生变形位移，随着悬臂段加长和波流荷载振动作用，下部扮土会自上而下发生液化。简单管桩的抗倾验算可以按照波流力与被动土压力的作用力矩分析，并考虑到海底的冲刷淘空深度。管桩打入下卧高强度粉土时，在保证打入深度的同时，应适当增大管桩的强度，加大管桩自振周期与波浪周期的差值。
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| 关 键 词： | 辽河三角洲 潮道软土 工程灾害 潮道沉积物 抗倾验算 管桩 变形 位移 土压力 自振周期 |
| 文章编号： | 1002-3682(2003)02-0097-07 |
Study on Weak Soil in Tidal Channel of the Liaohe River Delta and Its Engineering Hazard |
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| WEI Hong,wei.Study on Weak Soil in Tidal Channel of the Liaohe River Delta and Its Engineering Hazard[J].Coastal Engineering,2003,22(2):97-103. |
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| Authors: | WEI Hong wei |
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| Abstract: | The sediments in tidal channel of the Liaohe River delta are weak muddy soil, the elastic deformation or vibration of pipe pile under the actions of wave and current loads may result in the strength attenuation and deformation displacement of the weak soil, and the lower part of silty soil can be liquefied from above to below due to the lengthening of pile cantilever section and the vibration effect of wave and current loads. The anti toppling checking computation of simple pipe pile can be made by using the applied moment analysis of wave and current force and passive soil pressure, and the hollowing depth of seabed scour shall be taken into consideration. When the pipe pile is driven into the high strength underlying silty soil, the driving depth shall be ensured, and the strength of pipe pile and the difference between wave period and natural vibration period of pipe pile shall be increased as well. |
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| Keywords: | Liaohe River delta weak soil in tidal channel engineering hazard anti toppling checking computations |
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