激光与光电子学进展, 2018, 55 (5): 050606, 网络出版: 2018-09-11
增敏微型FBG应变传感器在预制桩模型实验中的应用 下载: 1096次
Application of Enhancement Micro FBG Strain Sensor in Model Experiment of Static Pressure Precast Pile
传感器 增敏 光纤布拉格光栅 应变传感器 静压预制桩 模型实验 sensors enhancement fiber Bragg grating strain sensors static pressure precast pile model experiment
摘要
在静压预制桩沉桩过程中,采用一种增敏微型光纤布拉格光栅(FBG)应变传感器测试桩身的受力情况。利用在模型桩桩身表面开槽埋设FBG传感器的方式,通过压桩贯入模型实验,实时测试了模型桩桩身在贯入过程中的受力状态,分析了桩身轴力和桩侧摩阻力随贯入深度变化的规律。实验结果表明:该传感器预埋到模型桩桩身表面能很好地与桩体结合,可以精确测试模型桩桩身的受力变化,并且在模型实验中预制成功率高、安装灵活。
Abstract
A kind of enhancement micro fiber Bragg grating (FBG) strain sensor is used to test static pressure precast pile force during precast pile driving. We make a groove on the surface of the model pile body to bury FBG strain sensor, use static pressure precast pile penetration model experiment to test stress states in real time, and analysis profiles of axial force of pile shaft and side friction of pile with embedded depth. Experiment results show that the enhancement micro FBG strain sensor can be embedded well with model pile and can test stress states of model pile exactly. In addition, this kind of FBG sensor shows advantages of high prefabricated success rate and easy installation.
王永洪, 张明义, 张春巍, 白晓宇. 增敏微型FBG应变传感器在预制桩模型实验中的应用[J]. 激光与光电子学进展, 2018, 55(5): 050606. Yonghong Wang, Mingyi Zhang, Chunwei Zhang, Xiaoyu Bai. Application of Enhancement Micro FBG Strain Sensor in Model Experiment of Static Pressure Precast Pile[J]. Laser & Optoelectronics Progress, 2018, 55(5): 050606.