与普通光纤布拉格光栅(FBG)应变传感器相比,低温敏FBG应变传感器对温度灵敏性低、对应变灵敏性高。故将低温敏FBG应变传感器应用于静压PHC管桩贯入过程中,监测了PHC管桩静压贯入过程中的桩身应力、桩端阻力和桩侧摩阻力的变化。实验结果表明:低温敏FBG应变传感器可以较好地对静压PHC管桩贯入过程进行监测,为静压PHC管桩贯入过程监测及分析提供了新的测试器件。

Compared to common fiber Bragg grating (FBG) strain sensor, the FBG strain sensor with low temperature sensitivity has low sensitivity to temperature and high sensitivity to strain. We apply the FBG strain sensors with low temperature sensitivity to static pressure PHC pipe pile penetration test, and monitor the variations of force of pile shaft, toe resistance of pile, and side resistance of pile during the static pressure penetration of the PHC pipe pile. The experimental results indicate that application of FBG sensor with low temperature sensitivity on monitoring static pressure PHC pipe pile during penetration process is suitable, which provides a new testing device for monitoring and analyzing on static pressure PHC pipe pile during penetration process.