考虑施工动态影响的施工期管片上浮分析  

Analysis of the Segments Floating During Construction Considering the Influence of Construction Dynamics

作　　者：胡勇[1] HU Yong(China Railway 18^(th)Bureau Group Co.Ltd.,Tianjin 300222,China)

机构地区：[1]中铁十八局集团有限公司,天津300222

出　　处：《铁道建筑技术》2021年第9期144-147,共4页Railway Construction Technology

基　　金：广东省交通运输厅科技项目(2016-02-026);广州市科技计划项目产学研协同创新重大专项(201704020139)。

摘　　要：基于温克尔弹性地基上的无限长梁理论和等效连续梁理论,构建了考虑施工动态的管片上浮分析预测模型,通过对比模型的预测值与施工现场实测值,主要结论如下:刚脱出盾尾的管片上浮量最大,距离盾尾越远的管片上浮量越小;考虑施工步影响时,目标环的上浮量逐渐增大,但上浮速率变小,之后目标环距离盾尾约60 m处时,目标环的上浮量不再增加,稳定在一个值。模型理论值和现场实测数据较为吻合,表明本文所提方法的准确性和适用性。Based on Winkel’s theory of infinite beams on elastic foundations and equivalent continuous beams theory,this paper constructs an analysis and prediction model of segment floating considering construction dynamics.By comparing the predicted value of the model with the actual measured value of the construction site,the main conclusions of this paper are as follows:the segment that has just emerged from the shield tail has the largest float,and the farther the segment is from the shield tail,the smaller the float;when considering the influence of construction steps,the amount of ascent of the target ring gradually increases,but the rate of ascent becomes smaller.After that,when the target ring is about 60 m away from the shield tail,the amount of ascent of the target ring no longer increases and stabilizes at a value.The theoretical value of the model is in good agreement with the field measured data,which shows the accuracy and applicability of the method proposed in this paper.

关 键 词：管片上浮 温克尔弹性地基梁 施工步 现场实测 

分 类 号：U451.4[建筑科学—桥梁与隧道工程]