Experimental investigation of pavement behavior after embankment widening using a fiber optic sensor network
Experimental investigation of pavement behavior after embankment widening using a fiber optic sensor network
复制标题
使用光纤传感器网络对路堤拓宽后的路面性能进行实验研究
DOI：
10.1177/1475921714548935
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发表时间：
2015-01-01
影响因子：
6.6
通讯作者：
Zhang, Cheng-Cheng
中科院分区：
文献类型：
--
作者：
Weng, Xiaolin;Zhu, Hong-Hu;Zhang, Cheng-Cheng
为了了解加宽路堤沥青混凝土路面的实际健康状况，进行了全尺寸模型试验研究。基于光纤布拉格光栅的传感器网络用于监测路面结构内部的应变分布，该结构受到不同的沉降。采用改进的准分布式传感器系统封装安装方法，既保证了传感器的高成活率，又实现了纵向和横向轴向应变的精确测量。根据监测结果，详细分析了不同沉降下路面结构的应变特征。研究发现，一般情况下，由于路堤的差异沉降，沥青路面结构的顶层受到拉应力的影响。当差沉降增加到22cm时，路面出现塑性变形。路面基层的响应比上层和中层的响应最显著。路堤土工格栅加固对缓解路面拉应力有积极作用。该实验研究还表明，光纤传感器网络具有高精度监测路面性能的能力。
In order to investigate the actual health condition of asphalt concrete pavements on widened road embankments, a full-scale model test study was conducted. A fiber Bragg grating-based sensor network was developed to monitor the strain distributions within the pavement structure, which was subjected to differential settlements. An improved packaging and installation method of the quasi-distributed sensor system was utilized, which not only ensured a high sensor survival rate but also achieved accurate measurement of axial strains in longitudinal and transverse directions. Based on the monitoring results, the strain characteristics of the pavement structure under different settlements were analyzed in detail. It is found that in general, the top layer of the asphalt pavement structure was subject to tension stress due to the differential settlement of the embankment. Plastic deformation of the pavement was observed when the differential settlement increased to 22cm. The base layer of the pavement had the most significant response in comparison with the top and middle layers. The geogrid reinforcement in the embankment had a positive effect to alleviate the tension stress in the pavement. This experimental study also indicates the capability of fiber optic sensor networks to monitor the performance of pavements with a high degree of accuracy.