EFFECTS ON DYNAMIC CHARACTERISTICS AND RESPONSE OF RAMMED SOIL-CEMENT PILE COMPOSITE FOUNDATION

Dynamic property experiments of full scale rammed soil-cement pile composite foundation are conducted by means of simulating natural earthquake through blast earthquake. With no load applied, the dynamic characteristics and time-history responses of natural foundation and rammed soil-cement pile composite foundation are analyzed firstly. Then the dynamic characteristics and time-history responses of single pile and group-piles rammed soil-cement pile composite foundation are analyzed under static load and explosions respectively. The horizontal displacement and the peak acceleration of single-pile and group-piles composite foundation under blast earthquake action are studied, as well as the variation frequencies under different load conditions. This research provides references for the later study of bearing capacity and deformation characteristics of rammed soil-cement pile under dynamic load.