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通过分析双列双边授流情况下杂散电流的分布和杂散电流对金属管道的腐蚀模型,得出杂散电流对金属管道的腐蚀模型。在分析拱顶混凝土开裂过程的基础上,研究了杂散电流对隧道拱顶沉降的影响。为了实现对隧道拱顶沉降的实时监测,提出了一种新的基于光纤光栅传感器的监测方法。采用匹配光栅解调,实现了拱顶沉降的辨识,进而建立了拱顶沉降模型,最后通过仿真检测沉降模型的正确性。
By analyzing the distribution of stray current and the corrosion model of stray current to metal pipe under double-row double-flow, we get the corrosion model of stray current to metal pipe. Based on the analysis of cracking process of vault concrete, the influence of stray current on settlement of tunnel vault was studied. In order to realize the real-time monitoring of tunnel dome settlement, a new monitoring method based on FBG sensor was proposed. The matched raster demodulation is used to realize the identification of vault settlement, and then the vault settlement model is established. Finally, the correctness of the settlement model is tested by simulation.