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输油气管道通过山区时不可避免地会受到滑坡灾害的威胁。为了分析管道在滑坡作用下的应变响应特点,利用ANSYS有限元分析软件建立了管道横向通过滑坡的模型,并考虑了管道与土体的相互作用。在此基础上,通过算例分析了管道轴向应变的分布特点,并分析了滑坡宽度、管道壁厚以及管道埋深对管道轴向应变的影响规律。结果表明:(1)横向滑坡作用下,管道轴向应变有沿滑坡作用中心位置呈对称分布的特点;(2)在滑坡作用中心位置、滑动区与非滑动区交界处附近的管道将会产生最大的轴向应变,是管道最为危险的截面;(3)适当增加管道壁厚和减小管道埋深可以达到降低管道应变的目的。
As the pipeline passes through mountains, it is inevitable that it will be threatened by landslide hazards. In order to analyze the response characteristics of the pipeline under the action of landslide, ANSYS finite element analysis software was used to establish the model of the pipeline crossing landslide, and the interaction between pipeline and soil was considered. On this basis, the distribution characteristics of the axial strain of the pipeline are analyzed by an example. The influence of landslide width, pipe wall thickness and pipeline depth on the axial strain of the pipeline is analyzed. The results show that: (1) Under axial landslide, the axial strain of the pipeline is distributed symmetrically along the center of the landslide; (2) In the center of the landslide, the pipe near the junction of the sliding area and the non-sliding area will be produced The maximum axial strain is the most dangerous section of the pipeline. (3) The purpose of reducing the pipeline strain can be achieved by appropriately increasing the wall thickness of the pipeline and reducing the depth of the pipeline.