Based on the long-term settlement monitoring data of driven piles in twenty-five high-rise buildings in Shanghai,the effects of the type of pile toe bearing strata,sand layer depth ratio in compressible layers under pile tip,properties of soil round the pile shaft and construction speed rate on the long-term settlement characteristics are analyzed.

Permanent deformation prediction model of sandy soil under repeated load;

Test research on internal friction coefficient of sandy soil tunnel surrounding rock;

Mesomechanical simulation of seepage flow in sandy soil;

Progressive failure of sand and its numerical simulation;

Compression-dilatancy coupling effect and asymptotic state criterion of sand;

Numerical simulation of stress path tests on sand;