基于三维激光扫描的多营滑坡监测及稳定性分析

发布时间：2018-01-20 14:11

本文关键词： 多营滑坡三维激光扫描数值模拟　出处：《中国地质大学（北京）》2014年硕士论文　论文类型：学位论文

【摘要】：多营滑坡位于四川省雅安市雨城区中部青衣江东岸，根据现有的资料，在多营滑坡形成后，近些年都有变形迹象，居民居住区域和农田处有时会有地面裂缝出现，滑坡一旦滑动，会产生较大危害。论文对三维激光扫描仪应用于滑坡稳定性研究进行了探讨取得的主要成果如下：（1）使用Leica HDS8800三维激光扫描仪在多营滑坡现场采集三维激光扫描数据，并使用Cyclone软件对获取的点云数据进行了后续数据拼接、点云去噪等数据处理，建立了mesh模型，对输出的点云数据格式转换后在CASS软件中进行二维地形图的制作，绘制出多营滑坡的立面图、剖面图和平面图。（2）采用FLAD3D软件进行数值分析，建立三维模型对多营滑坡进行数值模拟，通过收集野外地质钻探资料获取多营滑坡的岩层特性、物质组成，选取岩土力学参数，计算出出滑坡的应力应变状态，，计算安全系数进行稳定性评价。结合三维激光扫描精确复现滑坡区域的宏观视图观测和数值分析的方法对滑坡的稳定性分析是有效防止滑坡灾害的方式，对多营滑坡的预防和治理有着重要意义。
[Abstract]:Duoying landslide is located in the east bank of Qingyi River in the middle of Yucheng District of Ya'an City, Sichuan Province. According to the existing data, after the formation of Duoying landslide, there have been signs of deformation in recent years. There are sometimes cracks in the ground where residents live and farmland, and landslides slide. This paper discusses the application of 3D laser scanner in landslide stability research, and the main results are as follows: 1) using Leica HDS8800 3D laser scanner to collect 3D laser scanning data at the site of multi-camp landslide. Cyclone software is used to deal with the data such as point cloud data splicing, point cloud denoising and so on, and the mesh model is established. After the point cloud data format is converted, the 2D topographic map is made in the CASS software, and the elevation, section and plane map of the multi-camp landslide are drawn. FLAD3D software is used to carry out numerical analysis, and a three-dimensional model is established for numerical simulation of Duoying landslide. Through collecting field geological drilling data, the rock characteristics and material composition of Duoying landslide are obtained. The stress and strain state of landslide is calculated by selecting the mechanical parameters of rock and soil, and the stability of landslide is evaluated by calculating safety factor. The stability analysis of landslide is an effective way to prevent landslide disaster by using 3D laser scanning to accurately reproduce the macroscopic view observation and numerical analysis of landslide area. It is of great significance for the prevention and treatment of multi-camp landslide.
【学位授予单位】：中国地质大学（北京）
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：P642.22;P225.2

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