Centrifuge investigation on seismic response of single pile in liquefiable soil

作者：Su Dong; Li Xiang-Song

来源：Chinese Journal of Geotechnical Engineering, 2006, 28(4): 423-427.

Seismic response of soil-pile-superstructure system was a very complicated issue, especially when liquefiable soil is involved. Centrifuge dynamic model tests were performed, with response of single-pile foundation under strong shaking being observed and recorded. By some numerical approaches, evolutions of soil-pile relative lateral displacement and lateral soil resistance were derived from the experimental data. It was shown that the excess pore pressure increased at a fast rate under strong earthquake. As the excess pore pressure increased, the lateral soil resistances and bending moments along the pile tended to decrease;the bearing capacity of pile foundation reduced as well. When sand was approaching to the liquefaction, the pile foundation lost most of its bearing capacity, which resulted in a severe settlement of the superstructure. The research has furthered our understanding on the mechanism of dynamic soil-pile interaction during the development of liquefaction, and would be helpful for establishing a guideline for aseismatic design of pile foundation in liquefiable soil.

• 出版日期2006