横向滑坡作用下埋地管道静力学与数值模拟对比分析

长距离输油管道周围环境复杂,灾害频发,其中滑坡地质灾害对埋地管道的长期安全运行构成了极大威胁.因此,研究滑坡作用下埋地管道的力学特性就极为重要.基于Winkler弹性地基梁模型和滑坡推力横向分布模型,考虑温差、内压及推力等因素引起的当量轴力的作用,建立横向滑坡作用下埋地管道受力变形的简化力学模型,根据对称条件、边界条件...

Comparative Analysis of Statics and Numerical Simulation of Buried Pipeline under the Action of Transverse Landslide

The surrounding environment of long-distance oil-transporting pipeline is complex and disasters occur frequently. Landslides pose a great threat to the long-term safe operation of buried steel pipelines. Therefore, it is extremely important to research the mechanical properties of buried steel pipelines. Based on transverse distribution model of Winkler Beam model of elastic foundation and landslide thrust while in the consideration of the function of equivalent axial force which is aroused by temperature difference, internal pressure and thrust factors, a simplified mechanical model of stress and deformation of buried pipeline under lateral landslide is built. According to symmetry conditions, boundary conditions, and deformation compatibility conditions of pipeline and landslide external pipeline in landslide, the differential equation of pipeline deformation and computational expressions of pipe deflection, angle, bending moment and shear force can be solved. The algorithm is used to evaluate the safety of the engineering case. Based on the ABAQUS software, the numerical simulation of the pipeline stress is carried out. The results of the two methods are basically the same. The results show that under the action of lateral landslide, the pipeline stress at the boundary of the landslide is the largest, the most likely to occur, and the deformation of the pipeline in the middle of the landslide is the largest.