摘要
研究目的:隧道衬砌缺陷是隧道检测的一个重要内容,探地雷达在隧道衬砌检测方面具有显著的效果和广泛的应用空间,分析总结典型衬砌缺陷的探地雷达波形特征,对于隧道衬砌检测具有参考意义。研究结论:通过研究可知,隧道围岩比衬砌雷达反射信号振幅大,且波形杂乱;衬砌钢结构的雷达反射信号外观上呈现双曲线特征,但钢筋的双曲线幅度窄,钢拱架的双曲线纵向延伸大,横向延伸小;衬砌空洞与围岩空洞的反射波同相轴错乱,有多次反射特征,反射波能量强,频率低。
Research purposes： Detecting the defect of tunnel lining is one important works in the detection of the railway tunnel. The ground penetrating radar has a significant effect and a wide applicable range in detecting the defect of the tunnel lining. The analysis and summary on the wave characteristics of the ground penetrating radar is crucial to detection of the defect of tunnel lining. Research conclusions：It can be seen from the study that the ground penetrating radar wave reflected by the rock around tunnel lining has a larger amplitude and stronger signal disorderly than the wave reflected by tunnel lining. The waveform reflected by the steel structure in tunnel lining looks like hyperbolic, but the amplitude of the hyperbolic of the reinforced bar is relatively narrow, and the hyperbolic of the of the steel arch frame extends much vertically with small lateral extension. phase axis of the The waveform reflected by the lining cave or surrounding rock cave has characteristics of the confused reflected wave with repeated and stronger reflections and low frequency.
出处
《铁道工程学报》
EI
北大核心
2012年第5期40-44,共5页
Journal of Railway Engineering Society
关键词
探地雷达
衬砌缺陷
波形特征
ground penetrating radar
lining defect
waveform characteristics
