横向冻融滑坡对埋地管道应力影响的数值模拟

摘要

由于冻土的性质与结构复杂，对温度的影响较为敏感，因此，冻土区埋地管道极容易受到冻土变化的影响。冻融循环对冻土区埋地管道的安全有很大的影响，对地形结构特殊的区域，冻融循环会改变原有的地质特性，在特定的条件下造成地质灾害的发生。研究了由于冻土融化沉积产生的横向冻融滑坡给管道带来的应力影响，并对不同位置的横向滑坡及对管道的影响程度进行了分析。通过研究发现，不同位置的横向滑坡对管道产生的应力影响差异很大。对受横向冻融滑坡影响的管道进行模拟分析，可很好地反映应力的变化情况，为冻土区埋地管道的施工建设提供理论依据。%Because of the complex of nature and structure of permafrost,it was more sensitive to the effects of temperature. Therefore buried pipelines were extremely vulnerable to change in permafrost zone.For the regional with the special structure of topographic,the freezing-thawing circulation would change the original geological characteristics,and caused geological disasters under certain conditions.A systematic study of the stress impact of the pipeline was generated by lateral landslide because of the melting permafrost.The degree of influence of lateral landslide with different positions on the pipeline was analyzed.Through simulation analysis showed that lateral landslide with different positions generated a great impact on the pipeline.The influence on pipeline generated by the freezing-thawing landslide was simulated and analyzed and could well reflect the changes in stress and provided a theoretical basis for building construction of buried pipelines in the permafrost regions.