摘要
滑坡是我国的主要地质灾害之一,微动探测技术凭借其野外采集的灵活性、高分辨率及环境适应性强的特点,在边坡地质工程探测中展现出显著优势。通过分析岩土体的微动信号,可精准获取边坡的地层速度结构与岩土分层信息,为滑坡预测、防治工程设计及监测网点布设提供关键地质依据。以重庆某高陡倾顺向岩质边坡治理为例,本研究采用高分辨率频率-波数算法,结合H/V谱比分析,合理、有效地推断该边坡岩体破碎区域及潜在深部滑动面。微动探测结果与钻孔数据高度吻合,验证了该方法的可靠性。相较于传统钻探,该技术可大范围探测隐伏断裂与低速异常区,且不受地形限制。通过微动数据分析,揭示了滑动面与软弱结构带的关联性,为分析成灾机理、进行灾情评估提供科学支撑。该案例表明,微动探测技术能够动态监测边坡变形趋势,结合长期数据,可为地质灾害预警与风险评估提供实时依据。
Landslide is one of the major geological disasters in China.Microtremor survey technology has demonstrated significant advantages in slope geological engineering investigations due to its flexibility in field data collection,high resolution,and strong environmental adaptability.By analyzing microtremor signals of rock and soil masses,this technology can accurately obtain stratigraphic velocity structures and rock-mass layering information of slopes,providing acritical geological basis for landslide prediction,prevention engineering design,and monitoring network layout.Through a case study on the remediation of a high-steep dipping consequent rock slope in Chongqing,this study utilizes a high-resolution frequencywavenumber(F-K)algorithm integrated with H/V spectral ratio analysis to reasonably and effectively infer the fracture zones and potential deep-seated sliding surfaces within the rock mass.The microtremor detection results show high consistency with the borehole data,verifying the method’s reliability.Compared with traditional drilling methods,this technology enables large-scale detection of concealed fractures and low-velocity anomaly zones without topographic constraints.Microtremor data analysis reveals the correlation between sliding surfaces and weak structural zones,providing scientific support for the analysis of disaster mechanism and the assessment of disaster.The case shows that microtremor survey technology can dynamically monitor slope deformation trends,and can provide real-time evidence for geological disaster early warning and risk assessment when combined with long-term monitoring data.
作者
张红梅
黄佳坤
殷勇
Zhang Hongmei;Huang Jiakun;Yin Yong(Fujian Provincial Institute of Architectural Design and Research Co.,Ltd.,Fuzhou Fujian 350001,China;Opening Fund of Key Laboratory of Geohazard Prevention of Hilly Mountains,Ministry of Natural Resources(Fujian Key Laboratory of Geohazard Prevention),Fuzhou Fujian 350001,China)
出处
《工程地球物理学报》
2025年第3期362-371,共10页
Chinese Journal of Engineering Geophysics
基金
自然资源部丘陵山地地质灾害防治重点实验室(福建省地质灾害重点实验室)开放基金(编号:FJKLGH2021K001)。
关键词
微动探测
滑坡
地质灾害
频散曲线
H/V谱比曲线
microtremor survey
landslide
geological disaster
dispersion curve
H/V spectral ratio curve
