Study on excess pore water pressures of sands mixed with clays under cyclic loading

Dynamic cyclic loading tests of the soils with va rious fine content are carried out with different strain level from low to high. Based on t he viewpoint of total energy dissipation, the effects of the following factors o n the excess pore water p ressure are studied:fine content,confining pressure, loading frequency, loading s tep and irregularity of loading. A normalization method is put forward for the e xc ess pore water pressure and total energy dissipation. An excess pore water p ressure rising model is established for the sandy clay. Relationships between mo del parameters and fine content of soil are discussed finally.