Silt soil sediment in theYellow River subaqueous delta

and its permeability is one of important geotechnical parameters of marine engineering design and seabed stability evaluation. The variation of coefficient of permeability of the Yellow River estuary seabed under cyclic loading

for example

wave

is not clarified now. Vibrant experiments in situ and in the laboratory are carried out to study the variation of coefficient of permeability along with the variation of vibration energy. It is found that the coefficient of permeability of the seabed under cyclic loading declines firstly and then increases continuously; and the extent of the variation is more than 4 times. The variation of bulk density etc. of the soil under cyclic loading is tested at the same time. Combining the observation of experimental phenomenon

the mechanism of variation of coefficient of permeability under cyclic loading is further analyzed.