The soil bed formation is a complex process which involves sedimentation and dead-weight consolidation. However

there isn’t a simple and feasible method for measuring the water content

density

grain size

pore water pressure and total stress during its physical model test now. An improved laboratory testing method has been carried out. Compared with the available testing methods

the surface settlement

water content (density) distribution

dissipation profiles of excess pore water pressure

and grain size distribution variation of deposition at different depths and times in the process can be obtained by using the improved method. The experimental results show that the measured data are reasonable; and error of consistency test is small; and the improved laboratory testing method is feasible