Abstract：
Some engineering characteristics of rigid pile composite-foundation that pile-soil-cushion combined action and the settlement varying regularities under all sorts of influence factors were discussed. The varying regularities of pile and soil’s displacement field under all sorts of different load have been analyzed. The settlement varying regularities and the influence degree under all sorts of influence factors were analyzed by FEM, the influence factors include the different cushion modulus, modulus of soil between piles, and pile spacing. The settlement of rigid pile composite-foundation is affected markedly by modulus of soil between piles. The pile spacing is the one of the main factors which affects the site settlement; and some measures of reducing settlement were putted forward.
