盾构施工有限元模拟及管片内力分析  

Finite Element Simulation of Shield Tunneling Construction and Internal Force Analysis of Pipe Segments

作　　者：孙森 李东阳 吴继想 邢健 陈舒 Sun Sen;Li Dongyang;Wu Jixiang;Xing Jian;Chen Shu(Henan Provincial Water Conservancy Second Engineering Bureau Group Co.Ltd.,Zhengzhou,Henan 450000)

机构地区：[1]河南省水利第二工程局集团有限公司,河南郑州450000

出　　处：《江西建材》2024年第8期240-242,共3页

摘　　要：文中采用有限元模拟方法,对盾构施工过程中的隧洞管片内力进行研究,构建不同覆土深度下的盾构模型,详细探讨了覆土深度对盾构隧洞管片轴力、弯矩以及剪力的影响。研究表明,盾构隧洞管片的轴力和剪力分布趋势一致,两者大小随覆土深度的增加而增加,最大值出现在管片两侧,最小值出现在管片顶部和底部。弯矩分析结果表明,随着覆土深度的增加,管片弯矩也相应增大,且弯矩最大值发生在拱顶处,最小值则出现在管片两侧。管片的变形总体上随覆土深度的增加而增加,最大变形出现在拱顶和拱底。This article uses finite element simulation method to study the internal forces of subway tunnel segments during shield tunneling construction.By constructing shield tunnel models with different soil cover depths,the influence of soil cover depth on the axial force,bending moment,and shear force of subway shield tunnel segments was discussed in detail.Research has shown that the distribution trend of axial force and shear force in subway shield tunnel segments is consistent,and their sizes increase with the increase of soil cover depth.The maximum value appears on both sides of the segment,while the minimum value appears at the top and bottom of the segment.The bending moment analysis results show that as the depth of soil cover increases,the bending moment of the pipe segment also increases accordingly,and the maximum value of the bending moment occurs at the arch top,while the minimum value occurs on both sides of the pipe segment.The deformation of the pipe segment generally increases with the increase of soil cover depth,with the maximum deformation occurring at the top and bottom of the arch.

关 键 词：盾构施工 有限元 内力分析 管片结构 覆土深度 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]