Abstract
This paper reports a numerical simulations about the pile-ground interaction behavior. The analysis code is the soil-water coupled finite deformation analysis (GEOASIA), which is capable of expressing the behavior of soils ranging from sand up to clay within the same theoretical framework. The elasto-plastic equation of the soil skeleton mounted on this code is the SYS Cam-clay model, which describes the soil skeleton structure (structure, overconsolidation and anisotropy) at work.
Analysis result shows comparatively good agreement with model test result. Moreover, further conclusion as follows can be derived with systematically conducted analyses. 1) With the movement of the pile, ground deformation occurs widely especially around the front of pile. 2) If loading speed is slow, density increases with ongoing migration of the excess pore water at the pile front which makes subgrade reaction force grows large. On the other hand, if loading speed is rapid, migration of pore water cannot be occurred which means that subgrade reaction force is smaller than that of slowly loaded case. 3) Virtually-imaged highly structured ground showed localized deformation with ongoing destruction of the structure which leads to non-smooth load displacement curve.
