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为系统揭示滑坡体蠕动变形的演化规律及其形成机理,本文以某典型工程区为研究对象,综合运用地质调查、合成孔径雷达干涉技术(Interferometric Synthetic Aperture Radar, In SAR)、地球物理探测、钻探以及监测等多源技术手段,对蠕动变形特征进行了全方位分析。通过遥感数据实现了对大范围地表形变的高效识别与定量监测,结合18个月累积形变量数据,分析了形变与气象因子之间的动态关系,随后通过瞬变电磁法与钻探验证,查明了坡体深部“硬-软-硬”的垂向地质结构特征,地表与孔内监测数据亦显示,变形量随时间持续累加,一年期中最高达到3.6mm。研究结论认为,坡体特有的“硬-软-硬”岩土结构是蠕动变形发生的内在结构基础,其中厚度最高达到100m的软弱夹层的空间展布与性状对变形范围和速率起决定性作用;而降雨入渗引发的地下水动力条件变化,则是驱动坡体变形加速和呈现阶段性演化的主要外在诱因。本研究提出的多技术融合方法为精准评价类似复杂地质条件下的蠕动型地质灾害提供了有力的技术支撑。
Abstract：To systematically reveal the evolutionary pattern and formation mechanism of landslide creep deformation, this study conducts a comprehensive analysis of creep characteristics at a typical engineering site by integrating multi-source techniques, including geological survey, remote sensing, geophysical exploration, drilling, and monitoring. The In SAR technique was utilized to efficiently identify and quantitatively monitor large-scale surface deformation. The dynamic relationship between deformation and meteorological factors was analyzed based on 18 months of cumulative deformation data. Subsequently, the transient electromagnetic method(TEM) and borehole data were used to ascertain the deep “hard-soft-hard”vertical geological structure within the slope. Surface and in-situ monitoring data also showed that deformation accumulated continuously over time, reaching a maximum of 3.6 mm within a one-year period. The study concludes that the unique “hard-soft-hard” geotechnical structure serves as the intrinsic structural basis for the creep deformation, wherein the weak interlayer, with a maximum thickness of 100 m, plays a decisive role in controlling the extent and rate of deformation thanks to its the spatial distribution and properties of. Furthermore, changes in groundwater dynamics induced by rainfall infiltration act as the primary external trigger driving the acceleration and phased evolution of the deformation. The proposed multi-technique integration approach provides robust technical support for the accurate assessment of creep-type geological hazards in similarly complex geological settings.
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基本信息:
中图分类号:P642.22;P237
引用信息:
[1]唐宇豪,唐林,刘康,等.基于综合方法的蠕动滑坡体变形特征研究[J].工程地球物理学报,2025,22(05):401-408.
基金信息:
西藏自治区科技计划项目资助（编号：XZ202402ZD0003）
2025-09-30
2025-09-30