Application of Fiber Bragg Grating Strain Sensors to a Centrifuge Model of a Jacked Pile in Collapsible Loess
Application of Fiber Bragg Grating Strain Sensors to a Centrifuge Model of a Jacked Pile in Collapsible Loess
复制标题
光纤布拉格光栅应变传感器在湿陷性黄土静压桩离心模型中的应用
DOI：
10.1520/gtj20150076
复制
发表时间：
2016-05-01
影响因子：
1.6
通讯作者：
Zhan, J.
中科院分区：
文献类型：
--
作者：
Weng, X.;Zhao, Y.;Zhan, J.
在土工离心模型试验中，使用传统的传感器往往会造成监测数据的偏差。这是由于独立的传输线引起的离心场电磁波之间的相互干扰。近年来，光纤布拉格光栅（FBG）传感技术的发展大大提高了土工离心模型试验中应变和温度监测的准确性和可靠性。本研究遵循一系列的离心模型试验进行了60克吨土工格栅，与光纤光栅传感技术用于监测上的静压桩应变，应变是由周围的土壤塌陷桩。采用改进的准分布式光纤光栅传感器系统的封装和安装方法，对黄土场地中具有浸水湿陷性的静压桩进行了应变监测。模型试验结果表明，所提出的光纤光栅传感器组件能够有效地监测静压桩的应变分布，是土工离心试验中应变监测的一种很有前途的解决方案。
The use of traditional sensors in a geotechnical centrifuge model test usually causes deviations in the monitoring data. This is because of the mutual interference among centrifugal field electromagnetic waves that is caused by the independent transmission lines. In recent years, the development of fiber Bragg grating (FBG) sensing technology has substantially improved the accuracy and reliability of monitoring the strain and temperature in geotechnical centrifuge model tests. This study follows a series of centrifuge model tests carried out on a 60 g-ton geocentrifuge, with FBG sensing technology used for monitoring the strain on a static pressed pile; the strain is caused by soil collapse around the pile. During the test, an improved packaging and installation method of the quasi-distributed FBG sensor system was employed to monitor the strain of a jacked pile in a loess field with immersion collapse. The model test results show that the proposed FBG-based sensor assembly monitored the strain distribution of the jacked piles effectively, proving that it is a promising solution for strain monitoring in a geotechnical centrifuge test.