摘要
雷达波频率反映了组成地层的岩性变化,有助于识别地层,当电磁波通过不同介质界面时,电磁波频率将发生明显变化。为研究区域地质情况与地质雷达波频率的关系,在大量地质雷达隧道超前预报报告和实测数据的基础上,通过对不同围岩类型雷达波频率的统计,按照围岩等级、岩性、水文情况3个方面进行了分析。通过分析得出地质雷达波频率与围岩等级相关关系的统计分析结果:不同等级围岩的雷达波频率范围有明显差异,围岩工程性质差,频率变低;不同水文状况的同等级围岩,波形频率分布无明显变化。
The GPR wave frequency can reflect the lithology of the strata. The frequency of the electromagnetic wave va- ries obviously when the electromagnetic wave penetrates through different media. The relationship between the GPR wave frequency and the grade of rock mass is analyzed in terms of rock mass grade, lithology and hydrology condition. Con- clusions drawn are as follows： For different grades of rock mass, there are different GPR wave frequencies; The worse the lithology of the rock mass, the lower the frequency ; For rock mass of the same grade, the frequency has no obvious variations when the hydrology Changes.
出处
《隧道建设》
2012年第1期61-65,共5页
Tunnel Construction
关键词
地质雷达
雷达波频率
围岩等级
ground penetrating radar （GPR）
radar wave frequency
rock mass grade
