Experimental Study on Static Load Bearing Capacity of Screw Piles in Collapsible Loess Area

Through the static load test of the bearing capacity of the screw piles of high-rise buildings in the collapsible loess area of Yan’an New Area,it is shown that the screw piles have the characteristics of friction-end bearing pile and the bearing capacity of single pile is higher.Under the same geological conditions,the increase of pile length after a certain depth has little effect on the bearing capacity of pile.As the screw pile in the loess area has a high bearing capacity,low pollution,economic and reasonable advantages,the process in Yan’an New Area of collapsible loess excavation area has a good prospect.However,there are few researches on application of screw pile technology in the excavated and filled areas of collapsible loess in Yan’an New Area.In the future application,it is suggested to analyze and study the influence factors of side resistance and end resistance of screw pile and the calculation method of bearing capacity.