Coupled unsaturated flow in claystone has high effect on strength and stability of underground engineering.
非饱和渗流、应力耦合行为是影响粘土类工程岩体的强度和稳定性的重要因素。
There exists boundary claystone near the boundary between both the Marine and terrestrial Permian and Triassic in the eastern Yunnan-western Guizhou area.