Field Test Study on Compressive Capacity of Cast-in-place Piles With Rotary Dug Holes
In order to improve the construction quality of rotary hole-dug cast-in-place pile in soft soil layer,the lateral resistance and axial force of rotary hole-dug cast-in-place pile were analyzed through field tests in a construction project.The results show that the greater the load,the greater the displacement of pile top;After unloading,the displacement of pile top does not decrease but does not decrease to the ini-tial state.The ultimate pile top load is 8 797.21 kN,corresponding to the pile top displacement is 45.14 mm,and the pile top displacement after unloading is 32.8 mm.At the same time,the displacement is not related to the observation time,and the curve remains stable.The axial force of pile body with load level of 9 000 kN is reduced by 2 times compared with load level of 8 000 kN.The relationship between pile side friction and depth increases first,then decreases and then stabilizes,and increases with the increase of loading level.
Rotary hole cast-in-place pileField testCompressive capacityPile axial forcePile side resistance
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