滑坡带埋地管道力学强度分析

Analysis of Mechanical Strength of Buried Pipelines in Landslide Areas

针对西部某滑坡段埋地管道的实际工况环境,开展了滑坡段埋地管道受力的理论分析,由于滑坡带的埋地管道受力非常复杂,因此,用有限元法建立了滑坡段埋地管道与土壤互作用的有限元力学模型,该模型可以方便和准确地模拟埋地管道与土壤的相互作用以及管道不同工况和不同边界条件下的应力和变形。根据该模型,详细地分析和研究了不同斜坡角度和不同滑坡长度下管道内的最大应力、应变的变化,重点分析了西部某段埋地管道的斜坡角度为20?时,管道内的最大应力随滑坡段长度的变化关系,为安全滑坡段长度的设计提供了理论依据,该方法可以在类似的斜坡地段埋地管道中推广应用。

Aiming at the actual work environment of buried pipeline in a certain landslide areas in the west,we carried the theoretical analysis of the forces of buried pipeline. Because the forces of buried pipeline in landslide areas are very complicate, the finite element mechanical model between the earth and the buried pipeline was constructed with finite element method （FEA）. The model can simulate conveniently and accurately the stress and strain of the pipeline under different work conditions and different mechanical boundary conditions as well as the interactions between the buried pipeline and the earth. Based on the model,the changes of the maximum stress and strain of the pipe under the different angles of slope and different lengths of the landslide were analyzed and studied in detail. When the buried pipeline is with 20？ angle of landslide,the relationship of the maximum stress of the buried pipe varies with the length of the landslide. The research provides the theoretical supports for the safety length of the landslide segment. The results of the research can be applied in the analogous buried pipeline.