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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。
Based on the Winker foundation model, Abaqus finite element software was used to establish the two-dimensional soil-soil interaction model. Taking the maximum soil displacement as the input condition, the bending strain of the pipeline itself and the joint rotation angle as the measurement indexes, the pipe diameter, soil bulk density, The relative stiffness of pipeline joints and other factors on pipeline deformation caused by excavation disturbances, establishing a direct connection between pipeline deformation and maximum soil displacement, and this connection with the pipeline safety standards to draw a visual assessment of the safety of the pipeline Sex. The analysis results show that the pipe bending strain and the joint corner have an inverse correlation. The safety of the small pipe diameter pipe is mainly controlled by the bending strain. The large pipe diameter pipe is mainly controlled by the joint rotation angle. Meanwhile, increasing the joint stiffness can reduce the damage at the pipe joint.