探地雷达在隧道衬砌缺陷检测中的应用

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Abstract 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． The waveform reflected by the lining cave or surrounding rock cave has characteristics of the confused phase axis of the reflected wave with repeated and stronger reflections and low frequency．

Key words： ground penetrating radar lining defect waveform characteristics

Received: 19 September 2011

PACS:

P631． 3

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2012/V29/I5/40

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