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Field observation of the wave-induced pore pressure response in a silty soil seabed
Geo-Marine Letters ( IF 2.1 ) Pub Date : 2021-02-04 , DOI: 10.1007/s00367-020-00680-6
Xingbei Xu , Guohui Xu , Junjie Yang , Zhongqian Xu , Yupeng Ren

Liquefaction of seabed sediments under the action of storm waves is an important form of seabed instability, which may cause damage to submarine structures such as pipelines and cables. A commonly used parameter to identify sediment liquefaction is pore pressure. The pressure response of the pore water at different depths of a silty soil seabed under storm waves was monitored by a probe rod in the Yellow River delta. The probe is made of a steel pipe with a length of 8 m and an outer diameter of 10 cm, which is equipped with 10 pore pressure sensors. According to the collected data, under a water depth of 8 m, silty soil seabed liquefaction starts when the significant wave height reaches 0.5 m, and the liquefaction depth is between 3.3 and 3.8 m under waves with a significant wave height of 3.65 m. Seabed liquefaction develops in a top-down manner, and the average development rate of the liquefaction depth is approximately 0.17 m/min.



中文翻译:

粉质土海床中波浪引起的孔隙压力响应的现场观察

风暴波作用下的海底沉积物的液化是海底不稳定的一种重要形式,它可能会损坏海底结构,例如管道和电缆。识别沉积物液化的常用参数是孔隙压力。利用黄河三角洲的测杆监测了暴风浪作用下粉质土壤海床不同深度孔隙水的压力响应。该探头由长度为8 m,外径为10 cm的钢管制成,配有10个孔隙压力传感器。根据收集到的数据,在水深为8 m的情况下,当有效波高达到0.5 m时,粉质土海床液化开始,在有效波高为3.65 m的波下,液化深度在3.3至3.8 m之间。海底液化以自上而下的方式发展,

更新日期:2021-02-04
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