摘要：本文首先基于CAPWAP_C法，针对现有高应变检测拟合方法的局限性，分别推导出传感器距桩顶4个单元内的力波与速度拟合公式。然后根据推导所得的公式编制计算程序，拟合出传感器在不同位置时的力波与Zv图，并分析传感器安装位置对最终拟合曲线的影响。最后将所得的力波与Zv图与原方法拟合所得到的力波与Zv图以及实测F-Zv图进行对比分析，论证改进方法的优异性，更符合工程实际。

Abstract: This research bases on CAPWAP_C method and in the light of the limitations of present PDA method to deduce fitting F and v formula of high-strain pile driving where the sensor is in 4 units. According to the deduced formula, the research braids analyzing program. Then, a fitting F and Zv figure is drawn for a certain position of sensor, and analyses the influence of PDA results by the place of sensors. Further, this paper demonstrates advantages of the new approach over the old by comparing new fitting F and Zv figure with the old one and actual one , confirms the new approach is more suitable for real engineer project.