In-situ Compressive Static Load Test Analysis of Super Long and Large Diameter Drilled Pile Foundation
Taking a bridge project as an example,the time-history response curve of settlement of different types of piles under static load and the mechanism of load transfer with depth are analyzed in this paper.The results show that the settlement of pile No.2 under the same load level is reduced by 55.3%～67.8%compared with pile No.1.Under all load levels,the axial force of bored pile decreases with increasing depth.Under the same load level,the axial force of bored pile is slightly higher than that of pile No.1,and the supporting percentage of pile end of pile No.2 is higher than that of pile No.1 under maximum load level.With the increase of applied load level,the lateral friction resist-ance of bored pile increases rapidly at first and then becomes stable.Under the same load level,the side friction resistance of pile No.2 is greater than that of pile No.1.In short,the longer the pile,the stronger the bearing capacity of the bored pile.
Foundation pit engineeringLarge diameter drilled pileField compressionStatic load testSettlement amountAxial force
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