施工技术 2014年10月上 94 CONSTRUCTION TECHNOLOGY 第43卷第19期 D0I:10.7672/5js2014190094 光纤光栅传感器在FRP土钉现场拉拔试验中的应用* 金清平，郑祖嘉，雷学文 (武汉科技大学城市建设学院，湖北武汉430065) [摘要]FRP不同于钢筋材料特性，FRP土钉与灌浆材料的黏结力分布与发展规律等作用机理一直是研究的难题 和急需解决的问题.通过在FRP土钉中埋设光纤光栅传感器，并将FRP土钉用于实际边坡支护，在施工完成后进 行现场拉拔力测试试验，测定短期拉拔力作用下FRP土钉的受力特性，分析表明：FRP土钉承担了支护作用；受力 初期钉体近端先承力；随着拉拔力增大，钉体各点受力增长率不一致，近端初期增长较快，到一定拉拔力后，钉体各 点拉拔力增长率趋于常数；钉体各位置承载力的变化趋势最后均呈现一致性，但大小不均匀. [关键词]边坡防护：光纤光栅；FRP土钉；支护；拉拔试验 [中图分类号]TU413.4 [文献标识码]A [文章编号]1002-8498(2014)19-0094-04 Application of FBG Sensor in FRP Soil Nailing Pull-out Tests Jin Qingping Zheng Zujia Lei Xuewen (School of Urban Construction Wuhan University of Science and Technology Wuhan Hubei 430065 China) Abstract:Different from reinforcement material properties adhesion distribution and development law between FRP (fiber reinforced plastics)soil nailing and the grout have been urgent research problems. FBG sensors were embedded in FRP soil nailing and used for the actual slope support.After pletion of the construction field pull-out force tests were done to measure force characteristies of FRP soil nailing.The analysis shows that FRP soil nailing assumed the supporting function.At the beginning the proximal soil nailing withstand pull-out force.With the pull-out force increasing the force growth is inconsistent in different points of soil nailing proximal soil nailing has more rapid growth early after a certain pulling force points tested of soil nailing tend to a constant growth in pull-out force.The force on soi...
光纤光栅传感器在FRP土钉现场拉拔试验中的应用.pdf
