山区管线滑坡风险评价中斜坡单元划分方法改进
Improvement of Slope Unit Division Method in Risk Assessment of Pipeline Landslides in Mountainous Areas

随着长距离输油输气管道不断建设，管道不可避免地需穿越山区地段，而管道沿线山体容易发生滑坡，尤其在降雨工况下。山体滑坡时管道在滑坡体拉伸和挤压作用下发生变形，轻则导致管道变形，影响正常运行，重则直接导致管道断裂输送介质泄露，故对管道沿线山区地段进行风险评价，预测易发生滑坡的高风险区域，但是在预测前需要制作评价单元，其中斜坡单元是山体滑坡预测中常用的评价单元，根据文献调研斜坡单元的划分方式有两种即水文法和曲率法，但两种方法划分的斜坡单元均存在与实际地形不匹配的情况，而斜坡单元划分方法直接影响预测准确性。故本文结合水文法和曲率法的优势划分斜坡单元，最大限度地使斜坡单元与地形匹配。
With the continuous construction of long-distance oil and gas pipelines, the pipelines inevitably need to pass through mountainous areas, and the mountains along the pipelines are prone to landslides, especially under rainfall conditions. When a landslide occurs, the pipeline is deformed under the action of stretching and extrusion of the landslide body, which may cause deformation of the pipeline and affect normal operation, or directly lead to pipeline fracture and leakage of the conveying medium. The high-risk areas of landslides, but the evaluation unit needs to be made before the prediction. The slope unit is the commonly used evaluation unit in landslide prediction. All the divided slope units do not match the actual terrain, and the division method of the slope unit directly affects the prediction accuracy. Therefore, this paper combines the advantages of the hydrological method and the curvature method to divide the slope units to maximize the matching of the slope units with the terrain.