小規模建築物に用いる回転貫入杭の支持力特性に関する統計的検討

抄録

For estimating the bearing capacity of screw piles which are used for the small building foundations, we collected the loading test data and statistically examined the relations between the ultimate bearing capacity and the conversion N-value by the SWS tests. Correlation is comparatively high in the ultimate end bearing capacity with the average conversion N-value within above and below 1D_w (D_w : tip wing diameter) of pile tip. However, the ultimate end bearing capacity and the ultimate frictional resistance of screw pile were smaller than those of straight pile because of disturbance of the surrounding ground by the tip wing in the penetration.