Test of Foundation Pile Selection in New Weinan Railway Station of Zhengzhou-Xi'an Railway Passenger Dedicated Line

Research purposes:The researches are just used for testing the mechanical responses of the pile foundation for bridge according to the typical project,and also expecting to get involved in soil pile length range of resistance and the difference on the response.According to the test results,the suggestive values of the tip resistance and the pile side resistance for the Elevated bridge foundation piles in the New Weinan Railway Station are given.Research conclusions:Based on the static load test of Viaduct Pile Foundation,the bearing capacity of post grouting pile and pile with conventional process are analyzed.Measured by the static load test of embedded load box method and the internal force of pile reinforcement stress meter,the bearing properties of the two piles are analyzed comparatively.The results show that the side of two test pile play differences,and the post-grouting technology of spinning drill pile has good effect of reinforcement and improvement on the foundation.The ultimate bearing capacity of single pile is about2.8 times that of the conventional process test pile.It can improve the characteristics of the interface between pile and soil,which increase the bearing capacity and decreases the settlement of pile effectively.The post grouting technique is useful for improving the behavior of pile bearing significantly.The research results could be used for the pile selection design guide and construction in the Zhengzhou-Xi'an Railway Passenger Dedicated Line,and also for the similar project referencing.