Research and application of single pile ultimate bearing capacity of screwed filling pile

Screwed filling pile is a new kind of pile which has advantages of high bearing capacity, low construction cost, convenient construction and non-environmental pollution. But this technique is at the early stage of development, research work is not systematic. In order to promote engineering application of screwed filling pill, this paper analyzed its failure mechanism, introduced three computation methods of single pile ultimate bearing capacity and put forward an empirical formula which was applied in an actual engineering example. Compared with the static load experiment results and the predicted results with hyperbola method of three piles, the empirical formula of single pile ultimate bearing capacity is feasible and practical.