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油气管道沿线的地质滑坡会对管道安全运行造成极大威胁,管道一旦发生过量位移或受到过量应力,将产生屈曲变形甚至断裂。采用人工堆土的方法,建立了实体滑坡模型,整个模型平面形态采用圈椅形,将埋地管道当作埋地长梁,主要监测滑坡体自身表面变形、管道变形与应力、管土之间的相互作用力以及滑坡体内部力的分布形式。依据实体模型试验结果,结合弹性地基梁理论构建了横向管道滑坡的有限元模型,结果表明:在横向管道滑坡中,管道应力较大处位于滑坡宽度中央和滑坡两侧边界处。将有限元分析结果与试验监测结果进行对比,从而验证了所建模型的有效性。该模型可以用来进一步探讨滑坡对管道的力学作用。
Geological landslides along the oil and gas pipelines will pose a great threat to the safe operation of pipelines. Once an excessive displacement or excessive stress is exerted on the pipelines, buckling or even rupture will occur. The artificial landslide method is used to establish the physical landslide model. The plane shape of the whole model adopts the shape of a circle chair and the buried pipe as the buried long girder, which mainly monitors the deformation of the landslide itself, the deformation and stress of the pipeline, Interaction forces and the distribution of forces within the landslide body. According to the result of solid model test and the theory of elastic foundation beam, the finite element model of lateral pipeline landslide is established. The results show that in the lateral pipeline landslide, the stress of pipeline is located at the center of the landslide width and at both sides of the landslide. The finite element analysis results are compared with the test results to verify the validity of the model. The model can be used to further explore the mechanical effects of landslides on the pipeline.