基于FLAC3D的某赛车场PHC管桩参数优化研究

Research on PHC Pipe Pile Parameters Optimization of Circuit Based on FLAC3D

以现场单桩静载试验为依据,利用FLAC3D数值模拟软件,对武汉国际赛车场PHC管桩的承载力进行数值模拟研究。在设计单桩极限承载力的情况下,现场静载试验结果和数值模拟结果相吻合,证明建立的数值模型适合该工程的研究,进一步利用数值模拟研究桩长对单桩承载力的影响。研究结果表明:现场静载试验加压至设计极限承载力时,管桩沉降量为30.08 mm,小于规范要求值40 mm,且留有富余值。利用数值模拟研究桩长对管桩承载力的影响,当桩长减小3 m,管桩沉降为39.37 mm,仍满足规范要求。

Based on the static load test of single piles on site, the bearing capacity of PHC pipe piles in Wuhan International Circuit is studied by FLAC3 D numerical simulation software. In the case of designing the ultimate bearing capacity of single pile, the results of on-site static load test are consistent with the results of numerical simulation, which proves that the numerical model is suitable for the study of this project. The numerical simulation is further used to study the influence of pile length on the bearing capacity of single pile. The research results show that, when the on-site static load test is pressurized to the design ultimate bearing capacity, the settlement of the pile is 30.08 mm, which is less than 40 mm required by the code, and the reserved value is adequate. The numerical simulation is used to study the influence of pile length on the bearing capacity of the pipe pile. When the pile length is reduced by 3 m, the settlement of the pipe pile is 39.37 mm, which still meets the requirements of the code.