Study on Characteristics of Bearing Capacities of Different Offshore Test Piles
The proposed site for a piled wharf in Tianjin South Port is covered with thick dense sand layer.Therefore,test piles can used to measure the penetration of the designed piles into the sand layer as well as the bearing capacities of different pile foundations.The test results show that either precast concrete pile or steel pipe pile has better penetration performance.The high strain detection for the axial ultimate bearing capacity of the foundation pile leads to a smaller result than that of the static load test,and the deviations are within the range of 5%.The bearing capacity of the precast concrete pile end shall not be less than 44.6%of the total bearing capacity,and the bearing capacity of the steel pipe pile end shall not be less than 21.9%of the total bearing capacity.The settlement ratio of the precast concrete square pile under same static and dynamic load is 1.40,and that of the steel pipe pile is only 0.90.After the extreme bearing capacity of the foundation pile is reached,its lateral friction shall be significantly greater than the extreme value specified in the code,namely,the latter one is conservative.
offshore test pilestatic load testinternal force of pilelateral frictioncharacteristics of bearing capacity
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