【摘要】 土层沉降是埋地管道面临的常见地质灾害之一，严重影响管道安全运行。为研究管道在土层沉降作用下的形变及力学行为，建立了管土耦合模型，分析沉降深度、地层弹性模量、沉降区长度、沉降过渡区长度及工作内压对管道形变及力学行为的影响。结果表明，沉降深度增加会增加管道的应力应变；地层弹性模量与管道最大应力成负相关，对应变影响较小；沉降区长度变化对管道应力应变值无明显影响，会使管道应力应变分布沿轴向移动；沉降过渡区长度对管道沉降处及非沉降处影响较大，增加沉降过渡区长度可减小应力应变。内压增加可使管道最大应力应变值减小。更多还原

【Abstract】 Land Subsidence is one of the common geological hazards faced by buried pipelines, which can severely affect the safe operation of pipelines. To study the deformation and mechanical behavior of pipelines under land subsidence, the influences of settlement depth, formation elastic modulus, settlement zone length, settlement transition zone length and working internal pressure on the deformation and mechanical behavior of pipelines were investigated.The results show that an increase in settlement depth will increase the stress and strain of the pipeline. The elastic modulus of the formation is negatively correlated with the maximum stress of the pipeline and has a relatively small influence on the strain. The change in the length of the subsidence zone has no significant effect on the stress and strain values of the pipeline, but it will cause the stress and strain distribution of the pipeline to shift along the axial direction. The length of the subsidence transition zone has a significant impact on the both the subsidence and non-subsidence areas of the pipeline. Increasing the length of the subsidence transition zone can reduce the stress and strain. An increase in internal pressure can reduce the value at the maximum stress-strain point of the pipeline.更多还原