地质灾害作用下埋地管道力学响应数值分析进展及问题探讨

Progress and Prospects of the Research on Mechanical Properties of Buried Pipelines under the Geological Disaster

断层、滑坡、泥石流、局部沉陷、隧道开挖等引起的管周土体失稳严重威胁埋地管道的稳定性,避免因为地质灾害的影响而造成管道破坏,是城市和油气田地下生命线工程急需解决的问题。数值模拟作为埋地管道与管周土相互作用分析的主要技术手段,可为埋地管道的全寿命设计提供更为快捷准确的指导。该文简述了地质灾害作用下埋地管道力学响应数值分析的研究进展,主要包括埋地管道典型地质灾害特点、管土相互作用单元及管道穿越地质灾害区有限元模型,并针对地质灾害作用下管道力学行为研究中所存在的问题,提出今后应开展基于壳式模型的管土相互作用、多种地质灾害耦合作用下管道力学行为和基于应变设计与评估准则的研究。

Fault movement,landslide,mining subsidence and tunnel excavation are the main reasons for buried pipeline damage.The main problem of lifeline engineering is to avoid the damage of buried pipelines caused by geological disasters.In this paper,the state-of-the-art of numerical study on the mechanical properties of buried pipelines under the geological disaster is summarized,including the typical geological disaster of buried pipeline,and the finite element model between buried pipeline and surrounding soil.In the meantime,future research on the mechanical response of the buried pipeline under geological disasters is proposed aiming at the existing problem,including the characteristics of buried pipeline-permafrost interaction,mechanics behaviors of pipeline under the coupling effects of geological disaster and strain-based design criteria of the pipeline.