三维“大场景”遥感技术在西康高铁地质勘察中的应用

包家山越岭段地形地质条件复杂、岩石软硬不均、不良地质和断裂构造发育,为西康高铁地质选线带来较大的困难。为提高勘察效率和质量,根据区域地质资料、三维大场景遥感影像特征及野外调查,建立工作区地质构造解译标志,对其地质构造、地层岩性及不良地质体进行遥感判释。综合三维大场景立体遥感技术和野外调查手段,建立岩类基本的遥感影像解译标志,以便对岩性进行综合判释;调查验证测区的地质构造及不良地质体的分布状态及规模,分析滑坡等不良地质现象的分布、规模及其特征。取得了较高精度的遥感地质解译信息,判释准确率较高,为铁路选线方案提供重要依据。

Application of 3D Large-scale Scene Remote Sensing Technology in Geological Survey of Xi'an-Ankang High-speed Railway

The Baojia Mountain Section is characterized by complex terrain and geological conditions with soft and hard uneven rocks, and developed bad geology and fault structure, giving rise to great difficulties in railway geological route selection for Xi'an-Ankang High-speed Railway. In order to improve the efficiency and quality of exploration, basic remote sensing image interpretation marks are established based on geological data and image features obtained by three-dimensional large scene remote sensing and field survey. Comprehensive interpretation of lithology is fulfilled, and high precision and accuracy of interpretation information are obtained. The distribution and scale of geological structure and bad geological bodies in the survey area are investigated and verified. The distribution, scale and characteristics of adverse geological phenomena such as landslides are analyzed, which provides an important basis for railway line selection.