光纤光栅传感技术在土工格栅加筋土坡稳定性分析中的应用

Application of FBG Sensing Technology in Stability Analysis of Geogrid-Reinforced Slope.

作者信息

Sun Yijie, Xu Hongzhong, Gu Peng, Hu Wenjie

机构信息

College of Transportation Science & Engineering, Nanjing Tech University, Nanjing 210009, China.

出版信息

Sensors (Basel). 2017 Mar 15;17(3):597. doi: 10.3390/s17030597.

DOI:10.3390/s17030597

PMID:28294995

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5375883/

Abstract

By installing FBG sensors on the geogrids, smart geogrids can both reinforce and monitor the stability for geogrid-reinforced slopes. In this paper, a geogrid-reinforced sand slope model test is conducted in the laboratory and fiber Bragg grating (FBG) sensing technology is used to measure the strain distribution of the geogrid. Based on the model test, the performance of the reinforced soil slope is simulated by finite element software Midas-GTS, and the stability of the reinforced soil slope is analyzed by strength reduction method. The relationship between the geogrid strain and the factor of safety is set up. The results indicate that the measured strain and calculated results agree very well. The geogrid strain measured by FBG sensor can be applied to evaluate the stability of geogrid-reinforced sand slopes.

摘要

通过在土工格栅上安装光纤光栅（FBG）传感器，智能土工格栅既能增强土工格栅加筋土坡的稳定性，又能对其进行监测。本文在实验室进行了土工格栅加筋砂土坡模型试验，并采用光纤布拉格光栅（FBG）传感技术测量土工格栅的应变分布。基于该模型试验，利用有限元软件Midas-GTS模拟加筋土坡的性能，并采用强度折减法分析加筋土坡的稳定性。建立了土工格栅应变与安全系数之间的关系。结果表明，实测应变与计算结果吻合良好。光纤光栅传感器测得的土工格栅应变可用于评估土工格栅加筋砂土坡的稳定性。