The design of research experiment about cohesive soil piping failure under the action of unsteady head

Abstract

At present, many scholars at home and abroad having been studying the action of the unsteady under water head. For example, on the basis of the unsteady seepage piping test, Mao Chang xi conduct an experiment of the stable seepage piping according to the test of the sine type flood tidal flow and theoretical analysis. However, no significant achievements were obtained. On the one hand, the interaction between the unsteady head such as the flood and soil is more complex. On the other hand, because of the complexity of the development of the piping, pore filling of fine grained soil is taken away by the seepage force, which has great randomness in the coarse grained soil. Based on the research unsteady under the head piping, a suitable method for unsteady head under the action of sand piping test may be found through a variety of experimental scheme comparison. What’s more, under the action of the flood and other unstable head, sand damage characteristics of piping were analyzed.