Interaction between tall superstructure,pile-raft foundation and soil in loess area

According to the analysis of the results for static loading test of single pile and measurements of engineering pile and raft for a tall building in loess area,this paper indicats the characteristics of the load carried by the bored cast in place pile in loess and the distribution of the load on the pile tops and the earth pressure under raft.The interaction between superstructure,pile raft foundation and soil is described.The results of the in situ test indicate that there is substantial contact pressure between the raft and the loess,and the gross load of building is shared by pile group and raft together.In this project,the load shared by raft is up to 28.6%.The distribution of the earth pressure under raft is studied and discussed.In addition,the characteristics of the tension pile under the podium of the tall building is analysed.