MECHANISM OF WAVE-INDUCED LIQUEFACTION AND DENSIFICATION IN SEABED
MECHANISM OF WAVE-INDUCED LIQUEFACTION AND DENSIFICATION IN SEABED
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DOI：
10.3208/sandf1972.30.4_90
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发表时间：
1990-12
影响因子：
3.7
通讯作者：
K. Zen;H. Yamazaki
中科院分区：
文献类型：
--
作者：
K. Zen;H. Yamazaki
本文从超静孔隙水压力的角度探讨了波浪作用下透水海床液化和密实化的机理。本文提出了“振荡”超静孔隙水压力的概念，并利用新研制的装置进行了模型试验。研究得出以下主要结论：1）在海床中激发振荡超孔隙水压力，波浪引起的海底压力以一定的阻尼和相位滞后传播到海床中，2）有效应力的变化幅度与振荡超孔隙水压力的变化幅度相同，3）海床中液化和密实交替发生，4）波致液化与地震液化在超静孔隙水压力产生机理上有很大不同。
ABSTRACT The mechanism of the wave-induced liquefaction and densification in permeable seabed is examined with particular reference to the excess pore pressure. A concept of the ‘oscillatory’ excess pore pressure has been introduced and verified by model experiments using a newly developed apparatus. The following main conclusions are drawn from the study; 1) the oscillatory excess pore pressure is excited in the seabed where the wave-associated bottom pressure is propagated into the seabed with some damping and phase lag, 2) the magnitude of the change in the effective stress is identical with the oscillatory excess pore pressure, 3) the liquefaction and the densification occur alternately in the seabed, even in one period of the wave loading, and 4) the wave-induced liquefaction is quite different from the earthquake-induced liquefaction in the mechanism of the generation of excess pore pressures.