高强砂浆钢筋网加固掉块后盾构管片研究  

THE SHIELD SEGMENTATION AFTER HIGH-STRENGTH MORTAR REINFORCEMENT MESH REINFORCEMENT BLOCK

作　　者：刘洋洋 魏纲 木志远 徐天宝 项鹏飞 LIU Yangyang;WEI Gang;MU Zhiyuan;XU Tianbao;XIANG Pengfei(School of Civil Engineering and Architecture,Anhui University of Science&Technology,Anhui Huainan 232001,China;Department of Civil Engineering,Hangzhou City University,Hangzhou 310015,China;China Railway 15th Bureau Group 5th Engineering Co.,Ltd.,Tianjin 300131,China;Department of Architectural Engineering,Zhejiang Tongji Vocational College of Science and Technology,Hangzhou 311200,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]浙大城市学院土木工程系,杭州310015 [3]中铁十五局集团第五工程有限公司,天津300131 [4]浙江同济科技职业学院建筑工程学院,杭州311200

出　　处：《低温建筑技术》2025年第2期56-61,共6页Low Temperature Architecture Technology

基　　金：浙江省基础公益研究计划项目(LGF22E080012)。

摘　　要：为探究地面堆载工况下高强砂浆钢筋网加固发生掉块后的盾构隧道的受力变形特征,使用midas GTS NX软件创建三维高强砂浆钢筋网加固盾构管片精细化有限元模型,以管片收敛变形量、螺栓应力、管片塑性变形等指标来分析高强砂浆钢筋网加固管片的效果,并与普通砂浆加固的管片变形进行对比。分析其不同加固宽度和不同偏心堆载位置下的影响规律。研究结果表明,高强砂浆钢筋网加固比普通砂浆钢筋网加固更具有优越性,能有效控制管片水平收敛变形,优化结构整体受力,最优加固效率为44.2%,加固后可限制分布在管片左右腰部区塑性变形的增加。随着加固砂浆钢筋网宽度和偏心堆载距离的增加,使加固效果越显著。研究可为盾构隧道管片不同形式的掉块破损修复加固提供参考。To investigate the stress and deformation characteristics of shield tunnels reinforced with high-strength mortar and steel mesh after spalling underground surcharge conditions,a refined 3D finite element model of reinforced shield segments is developed using MIDAS GTS NX.Indicators such as segment convergence deformation,bolt stress,and segment plastic deformation are analyzed to evaluate the effectiveness of high-strength mortar and steel mesh reinforcement,the results from which are compared with those of segments reinforced with ordinary mortar.We also examine the influence of varying reinforcement widths and eccentric surcharge positions.The findings indicate that high-strength mortar and steel mesh reinforcement outperform ordinary mortar reinforcement,effectively controlling horizontal convergence deformation and optimizing the overall structural stress.The optimal reinforcement efficiency achieved was 44.2%.Post-reinforcement,the increase in plastic deformation distributed around the waist areas of the segments was significantly limited.Additionally,as the width of the reinforced mortar steel mesh and the distance of eccentric surcharge increased,the reinforcement effect became more pronounced.This research provides a valuable reference for repairing and reinforcing spalling damage in shield tunnel segments using various reinforcement methods.

关 键 词：盾构隧道 高强砂浆钢筋网加固 水平收敛变形 塑性变形 

分 类 号：TU921[建筑科学—建筑设计及理论]