基于地脉动的花岗岩风化壳滑坡浅层结构与易发性指标研究

doi:10.3799/dqkx.2026.176

基于地脉动的花岗岩风化壳滑坡浅层结构与易发性指标研究

doi: 10.3799/dqkx.2026.176

1. 同济大学土木工程学院地质与水利工程系, 上海 200092;
2. 同济大学岩土及地下工程教育部重点实验室, 上海 200092;
3. 中国地质大学(武汉）工程学院, 湖北武汉 430074;
4. 福建省地质科学研究院, 福建福州 350013;
5. 中国地质大学(武汉）湖北巴东地质灾害国家野外科学观测研究站, 湖北武汉 430074

基金项目:

国家重点研发计划项目(2024YFC3012601)。

详细信息

作者简介:
秦林鹏(1999-),男,博士研究生,主要从事基于地球物理方法的地质灾害过程研究。Email:qinlp@tongji.edu.cn,ORCID:0000-0003-2251-3811

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出版历程
- 收稿日期: 2026-02-06
- 网络出版日期: 2026-06-29

Study on the Susceptibility Index of the Rainfall-Induced Landslides in Granite Weathering Crust Using Seismic Ambient Noise Recordings

1. Department of Geological and Hydraulic Engineering, Tongji University, Shanghai 200092;
2. Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092;
3. Faculty of Engineering, China University of Geosciences, Wuhan 430074;
4. Fujian Institute of Geological Sciences, Fuzhou 350013;
5. Badong National Observation and Research Station of Geohazards, China University of Geosciences, Wuhan 430074

摘要

摘要: 东南地区花岗岩风化壳边坡广布，在梅雨或台风暴雨作用下易发生群发性滑坡。本文以2024年6月福建武平下坝乡四处典型降雨型滑坡为例，结合高密度地脉动观测、无人机LiDAR和野外地质调查，采用水平-垂直谱比（HVSR）法反演边坡二维横波速度结构。结果表明，花岗岩风化壳可划分为低速残积土层、全风化层、强风化层和中风化层，其中残积土层为主要滑体，滑动面多发育于全风化层内。滑坡后缘普遍发育沿坡向展布的低速异常带，并与径流路径和渗流点对应，表明地下水弱化全风化层是重要控制因素。当残积土厚度大于约0.8 m且浅层平均横波速度低于约400 m/s时，坡体滑坡易发性较高。研究为花岗岩风化壳边坡的快速调查与滑坡易发性评估提供地球物理参考。
- 降雨型滑坡 /
- 花岗岩风化壳 /
- 地脉动 /
- 滑坡结构 /
- 易发性评估
Abstract: Granite weathering crust slopes are widely distributed in southeastern China and are prone to clustered landslides under prolonged Meiyu rainfall or typhoon-induced rainstorms. Characterizing shallow structural properties and their role in slope instability is essential for disaster prevention and risk assessment. Taking four typical rainfall-induced landslides in Xiaba Township, Wuping County, Fujian Province, in June 2024 as examples, this study integrates high-density ambient-noise measurements, UAV-based LiDAR surveys, and field geological investigations. The horizontal-to-vertical spectral ratio (HVSR) method was used to invert the two-dimensional shear-wave velocity structure of the slopes. The results show that the granite weathering crust can be divided into a low-velocity residual layer, completely weathered granite, highly weathered granite, and moderately weathered granite The residual layer constitutes the main sliding mass, while sliding surfaces are mostly developed within the completely weathered layer. Low-velocity anomalies are commonly developed near the landslide head scarps and extend downslope, spatially corresponding to surface runoff paths and seepage points. This indicates that groundwater-induced weakening of the completely weathered layer is an important controlling factor. Comparative analysis of typical cases further suggests that slopes with a residual soil thickness greater than approximately 0.8 m and a shallow average shear-wave velocity lower than approximately 400 m/s exhibit relatively high landslide susceptibility. This study provides a geophysical reference for rapid investigation and landslide susceptibility assessment of granite weathering crust slopes.
- Granite weathering crust /
- Rainfall-induced landslides /
- Ambient noise /
- Structure of landslides /
- Landslide susceptibility

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参考文献(46)

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基于地脉动的花岗岩风化壳滑坡浅层结构与易发性指标研究

doi: 10.3799/dqkx.2026.176

作者简介:
秦林鹏(1999-),男,博士研究生,主要从事基于地球物理方法的地质灾害过程研究。Email:qinlp@tongji.edu.cn,ORCID:0000-0003-2251-3811

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Study on the Susceptibility Index of the Rainfall-Induced Landslides in Granite Weathering Crust Using Seismic Ambient Noise Recordings

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留言板

基于地脉动的花岗岩风化壳滑坡浅层结构与易发性指标研究

doi: 10.3799/dqkx.2026.176

作者简介: 秦林鹏(1999-),男,博士研究生,主要从事基于地球物理方法的地质灾害过程研究。Email:qinlp@tongji.edu.cn,ORCID:0000-0003-2251-3811

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出版历程

Study on the Susceptibility Index of the Rainfall-Induced Landslides in Granite Weathering Crust Using Seismic Ambient Noise Recordings

计量

出版历程

目录

作者简介:
秦林鹏(1999-),男,博士研究生,主要从事基于地球物理方法的地质灾害过程研究。Email:qinlp@tongji.edu.cn,ORCID:0000-0003-2251-3811