Abstract: The experimental verification is conducted to verify the suitability of pore diameter method used to distinguish the seepage deformation types of various cohesionless coarse-gained soils. The statistical analysis is conducted based on seepage deformation testing results taken with 145sand samples from 27 projects. The results are as follows:(1)For the crushed gravels with continuous gradation, the coincidence rate is 80.0. (2)For the crushed gravels with discontinuous gradation, the coincidence rate is 55.0. (3)For the sands with different types, the coincidence rate is 22.0. Thus, the pore diameter method is applicable to the distinguishing of seepage deformation types of crushed gravels with continuous gradation. However, for the crushed gravels with discontinuous gradation and sands with different types, the suitability is poor.