【摘要】 基于Winker地基模型,采用Abaqus有限元软件建立二维管土相互作用模型,以最大土体侧移为输入条件,管线本身的弯曲应变和接头转角为衡量指标,分析了管径,土体密度,管线接头相对刚度等因素对开挖扰动下管线变形的影响,建立了管线变形和最大土体侧移之间的直接联系,并将这种联系结合管线安全标准绘制成图直观地评价管线的安全性。分析结果表明:管段弯曲应变和接头转角具有反相关性;小管径管线的安全性主要受弯曲应变控制,大管径管线主要受接头转角控制;同时增加接头刚度可以减少管线接头处的破坏。更多还原

【Abstract】 On the basis of Winker foundation model,a 2D model of soil-pipeline interaction was set by using Abaqus finite element software in this paper.Taking maximum ground settlement as input,bending strain and joint rotation as index,the influence of parallel trench construction on adjacent buried pipelines was studied,in which some parameters including pipeline diameters,soil density and joint stiffness was considered.The direct relations between the deformation of the pipelines and maximum ground settlement was established and be reflected by a graph to estimate the security of pipeline.It was shown that the relation between bending strain and joint rotation is counter-correlated.The security of pipeline with small diameter was mainly control by bending strain,while that of large diameter was mainly control by joint rotation.Increase of joint stiffness can reduce the occurrence of damage at the joint of pipelines更多还原