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海床土对波浪响应以及波致海床液化失稳的问题,已经有很多研究成果,而波浪作用海床液化土波动压力的研究还未见报道。采用波浪水槽实验,在未液化和液化两种情况下,分别施加不同波高的波浪,对底床各层位采集土体土压力,进行分析。实验结果表明,液化前后总土压力变化不明显,液化后的土动压力比液化前增大几倍到十几倍,且沿着深度的衰减速度更快。根据试验获得结果,进一步分析,提出了在水槽试验条件下的土动压力与波浪要素之间的经验公式。同时指出,在工程设计中应注意因底床液化引起的土动压力的增加的现象。
Many researches have been made on the response of seabed soil to wave and the instability of wave induced sea bed liquefaction. However, the study on wave pressure of seabed liquefied soil has not been reported yet. In the wave tank experiment, under different conditions of liquefaction and liquefaction, waves of different wave heights were applied respectively. The earth pressure of the soil was collected and analyzed. The experimental results show that before and after liquefaction, the total soil pressure does not change obviously. The dynamic pressure of soil after liquefaction increases several times to ten times than that before liquefaction, and decays more rapidly along the depth. According to the experimental results obtained, further analysis is made, and the empirical formula between soil dynamic pressure and wave elements under the test conditions of the flume is proposed. At the same time, it is pointed out that in the engineering design, the increase of soil dynamic pressure caused by liquefaction of the bed should be noticed.