土体沉降位置对管道跨越结构应力影响的数值计算

Numerical Calculation of the Effect of Soil Settlement Position on Stress of Aerial Crossing Pipeline Structure

当土体发生沉降时会使管道产生额外应力,给埋地管道带来安全隐患。埋地管道跨越结构的受力较为复杂,因此建立了跨越段埋地管道与土壤相互作用的有限元力学模型,分析了采用不同角度跨越结构时,管道跨越结构的应力变化情况。此外,根据该模型,详细分析了跨越段附近不同位置土体发生沉降时管道应力的变化情况,重点研究了当跨越结构中斜管段与水平方向夹角为50°时管道内的最大应力随土体沉降位置的变化情况,可为埋地管道的施工建设提供理论依据。

The earth＇s settlement would generate additional stress on pipeline,which was common security problems of buried pipelines.Because of the force of aerial crossing pipeline structure was more complicated,therefore a finite element mechanical model of interactions between the pipeline and soil in acrossing segments of buried pipelines was established,to analysis the changes of the stress in aerial crossing pipeline structure,when aerial crossing pipeline structure used different angles.Further,based on the model,a detailed analysis of the stress changes in the pipeline was obtained,when soil settlement occurred at different locations nearby the acrossing segments.The variation was studied on the relationships of the maximum stress within the pipeline with the position of soil settlement,when the angle between the oblique pipeline of crossing structure and the horizontal direction was 50°,provide a theoretical basis for building construction of buried pipelines.