Open AccessWave-induced stability of gassy seabed with different gas existing forms
Author(s) -
Zhongyi Wu,
Xiaoli Liu
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/546/2/022049
Subject(s) - seabed , bubble , liquefaction , geology , geotechnical engineering , ocean bottom , pore water pressure , mechanics , seismology , oceanography , physics
For highly saturated seabed soils, gas mainly exists in two forms: one is in the form of discrete small bubbles in pore water (referred to as “small bubble seabed”); the other is independent of the pore water, in the form of large bubbles surrounded by saturated soil matrix (referred to as “large bubble seabed”). For the two different kinds of gassy soil, based on different theoretical models, the wave-induced stability of gassy seabed has been investigated using finite element method. It has been shown that the wave-induced momentary liquefaction depth of the large bubble seabed is less than that of the small bubble seabed. However, the shear failure depth of the large bubble seabed is greater than that of the small bubble seabed, and the difference could be up to about 80%.