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花岗岩在我国有广阔的分布,对花岗岩的雷达波的研究可以为在花岗岩地区的工程建设施工提供有力的指导意义。通过对某隧道不同风化程度花岗岩进行地质雷达的测试,选取典型的雷达波进行频谱分析,探讨了不同风化程度花岗岩的地质雷达波的频谱特征。结果显示,全风化与强风化花岗岩的频谱能量均比较集中,但强风化花岗岩比全风化的花岗岩的频谱谱峰尖锐,强风化花岗岩的频率幅度主要分布的范围比全风化的要大,主频率亦大,而主频最大幅值变化不大。弱～微风化花岗岩则呈现多峰频谱,能量较分散,主频不突出,且最大幅值要小很多,仅为全风化花岗岩最大幅值的49.5%。根据以上结果,本文为隧道超前地质预报中对花岗岩的风化程度的判别提供参考。
Granite in our country has a broad distribution, the study of the radar wave of granite can provide a strong guiding significance for the construction of the granite project construction. By testing the geologic radar of granite with different degree of weathering in a certain tunnel, the typical radar wave is selected for spectrum analysis, and the spectral characteristics of the geologic radar wave of granite with different degree of weathering are discussed. The results show that the spectral energy of the fully weathered and strongly weathered granite is relatively concentrated. However, the frequency spectrum peaks of the strongly weathered granite are weaker than those of the fully weathered granite. The frequency range of the strongly weathered granite is mainly distributed in a wider range than that of the fully weathered granite. The main frequency Also large, but the maximum frequency change is not big. Weak ~ slightly weathered granite shows multimodal spectrum, the energy is more dispersed, the dominant frequency is not prominent, and the maximum amplitude is much smaller, only the weathered granite 49.5% of the maximum amplitude. Based on the above results, this paper provides a reference for judging the degree of granite weathering in the advanced geological prediction of tunnels.