公路工程地质灾害遥感图像识别及解译方法

在地处南迦巴瓦峰地区的西藏墨脱公路工程地质遥感勘察中, 以L andsat27 ETM + 卫星影像为信息源, 运用彩色合成、数据融合、主成分分析等数字图像处理方法, 结合基于地学知识的图像识别及解译技术, 对墨脱公路沿线的泥石流、滑坡、活动断裂等地质灾害进行全面解译分析及专题制图, 查明了公路方案线区域内活动断裂发育特征, 其中, 帕隆藏布断裂带、岗日嘎布断裂带等对错拉隧道将产生较大影响, 大型滑坡主要有5 个, 沿南峰南坡的雅鲁藏布江河谷两岸发育, 分布在仓孔、墨脱和洒拉库等地, 泥石流、崩塌广泛发育, 主要分布在雅鲁藏布江河谷、帕隆藏布河谷沿线的派、拉格-汗密、岗乡-波密一带, 其勘察和解译结果为墨脱公路工程线路方案选择、工程地质条件评价提供了充分的科学的依据。

The Way of Image Recognizing and Interpreting with Remote Sensing for Geological Disasters of Highway Engineering

By means of digital image processing techniques of color image composing ,image fusion, principal component analysis with landsat-7 ETM image, combined with image recognizing and interpreting technologies based on geology knowledge, geological disasters along Motuo highway, including debris flow, landslide, active structure, etc., have been completely analyzed, interpreted and mapped by themes in surveying of highway engineering geology with Remote sensing in Motuo of Tibet lied in Namjagbarwa region. The features of active faults along schedule route have been found out, both Palongzhangbu fault zone and Gangrigabu fault zone have a great influence on Cuola tunnel, five big landslides are distributed at both sides of Yaluzhangbu valley which lies in north slope of Namjagbarwa, there arc plentiful of debris flow and rockfall at Pai, Lage-Hanmi, Gangxiang-Bomi along Palongzhangbu and Yaluzhangbu valley, the result has provided enough scientific evidence for selecting highway route , evaluating engineering geology conditions.