Based on the API code, the double-parameter modified method and the revised computational formula for lateral dynamic p–y curves of pile foundation in liquefiable soil layers are presented by using pile-soil shaking table tests, and as a result, the unacceptable problem of the current coefficients for calculating the dynamic p-y curves by the API code in engineering practice can be solved.

This paper introduces the main mechanic process and new technology of excessively wet soil treatment technology,and introduces excessively wet soil treatment technology in low plasticity index liquefied silt area combining with engineering practice.

Based on the foundation "Liquefaction Test Study On The Rapid Railroad Bed" supported by the Railway Department, some works on the liquefaction of silty soils have been carried out.

Numerical Simulation and Laboratory Research of Liquefiable Soils Deformations during the Earthquake;

The paper introduces the theoretic basis of application of ramming expanded pile in practical project and the design process,highlighting the cause why the ramming expanded pile is difficult to drive into liquid soil layer and the technical measures that should be taken in its design and construction.