预应力高强混凝土管桩极限承载力的试验研究

On ultimate capacity of prestressed high strength concrete pipe piles

预应力高强混凝土管桩试验研究结果证明:预应力高强混凝土管桩极限端阻力标准值和桩端阻力修正系数取值偏低,管桩的承载力未能得到充分发挥。作者对单桩竖向极限承载力计算公式中的设计参数的取值问题进行了探讨,建议在大量试验研究的基础上,对管桩极限端阻力标准值或者桩端阻力修正系数取值进行调整。

This paper discusses the evaluation of the design parameter in the calculation formula of the single pile vertical ultimate capacity. According to the test results, the ultimate bottom resistance characteristic value qpk and the bottom resistance amending coefficient ξp of PHC(prestressed high strength concrete) pipe piles are less evaluated, so that the ultimate capacity of PHC pipe piles are not put into full play. The author proposes that the ultimate bottom resistance characteristic value and the bottom resistance amending coefficient of PHC pipe piles should be adjusted based on a great deal of test research.