CAJ | 학술논문

通过波浪水槽试验,研究规则波在1：30斜坡砂质海床上破碎时海床超静孔隙水压力响应规律,观察波浪破碎处的地形变化,并分析其形成原因.试验结果表明,在波浪破碎前后超静孔隙水压力有着明显的不同变化,破碎点处距底床表面最近的超静孔隙水压力值在整个过程中达到最大,且破碎带处超静孔隙水压力竖向衰减幅度均比破碎前、后要大,破碎点的超静孔隙水压力有明显增大;破碎前后超静孔隙水压变化与浪高变化呈正相关趋势,且破碎后两者的相关性没破碎前好;波浪破碎处地形变化剧烈,超静孔隙水压力在沙床顶部的变化较底部变化明显.砂层掏刷时,超静孔隙水压振幅变大;砂层堆积时,超静孔隙水压振幅变小.
통과파랑수조시험,연구규칙파재1：30사파사질해상상파쇄시해상초정공극수압력향응규률,관찰파랑파쇄처적지형변화,병분석기형성원인.시험결과표명,재파랑파쇄전후초정공극수압력유착명현적불동변화,파쇄점처거저상표면최근적초정공극수압력치재정개과정중체도최대,차파쇄대처초정공극수압력수향쇠감폭도균비파쇄전、후요대,파쇄점적초정공극수압력유명현증대;파쇄전후초정공극수압변화여랑고변화정정상관추세,차파쇄후량자적상관성몰파쇄전호;파랑파쇄처지형변화극렬,초정공극수압력재사상정부적변화교저부변화명현.사층도쇄시,초정공극수압진폭변대;사층퇴적시,초정공극수압진폭변소.
Based on the wave flume experiments,the response pattern of excess pore water pressure is studied on a 1∶30 slope sandy seabed under the regular breaking wave action.The topographic change is observed and its causes are analyzed in the broken wave zone.The results show that the excess pore pressure changes significantly and differently before and after wave breaking.The excess pore water pressure reaches the maximum on the area away from the nearest bed surface of the breaking point in the whole process,and the vertical decay rate of excess pore water pressure is larger than the before and after wave breaking in the broken zone.The excess pore water pressure increases significantly at the breaking point.Before and after the wave breaking,the change between excess pore water pressure and wave height has positive correlation trend,and the correlation is not very well after the wave breaking.The topographic change is great in the wave breaking zone.Excess pore water pressures changing at the top are significantly higher than it is at the bottom.When the sand scours,the amplitude of the excess pore water pressure increases.And when the sand accumulates,the amplitude of the excess pore water pressure decreases.