盾构隧道3D打印模型刚度有效率的试验验证  

Experimental Verification on Stiffness Effective Rate for Shield Tunnel 3D Printing Model

作　　者：陈立 李博 卢生安 张海涛[4] 吕延豪[4] CHEN Li;LI Bo;LU Sheng’an;ZHANG Haitao;LYU Yanhao(Wenzhou Survey and Mapping Research Institute Co.,Ltd.,325001,Wenzhou,China;College of Civil Engineering and Architecture,Wenzhou University,325035,Wenzhou,China;Wenzhou Railway and Rail Transit Investment Group Co.,Ltd.,325025,Wenzhou,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,430063,Wuhan,China)

机构地区：[1]温州市勘察测绘研究院有限公司,温州325001 [2]温州大学建筑工程学院,温州325035 [3]温州市铁路与轨道交通投资集团有限公司,温州325025 [4]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《城市轨道交通研究》2025年第4期243-248,253,共7页Urban Mass Transit

基　　金：温州市科学技术局项目(S2023024)。

摘　　要：[目的]为探究3D打印技术制作隧道模型的可行性,有必要测定盾构隧道纵横向刚度有效率的取值。[方法]通过对光敏树脂、环氧树脂和尼龙三种材料的拉伸和压缩试验,最终选择了光敏树脂作为盾构隧道管片的模型材料。通过相似第二定律计算,确定试验几何相似比为1∶30。试验基于温州轨道交通1号线盾构隧道工程,利用3D打印技术精细化设计隧道模型,衬砌管片采用弯曲螺栓连接,还原其细部结构。通过对3D打印隧道模型进行纵横向八级加载,测定了不同拼装工艺的纵横向刚度有效率。同时采用椭圆度■来具体描述不同外部荷载作用下隧道的横向变形程度。最后对比其他学者的模型试验,论证了该方法的可行性以及精确性。[结果及结论]3D打印制作的盾构隧道,通缝拼装时纵向刚度有效率为0.13~0.20,横向刚度有效率为0.67;错缝拼装时,纵向刚度有效率为0.15~0.30,横向刚度有效率为0.79;错缝拼装隧道刚度略大于通缝拼装隧道刚度。均质隧道、错缝拼装隧道及通缝拼装隧道的椭圆度依次为1.62‰、1.87‰及2.55‰,通缝隧道模型在外部加载作用下的压扁程度最大。[Objective] In order to explore the feasibility of 3D printing technology in making tunnel models,it is necessary to determine the effective rate values of the shield tunnel longitudinal and lateral stiffness.[Method] Through tensile and compression experiments on photosensitive resin,epoxy resin and nylon three materials,photosensitive resin is finally selected as the model material for shield tunnel segments.Through the calculation of the second law of similarity,the experiment geometric similarity ratio is determined to be 1:30.The experiment is conducted based on Wenzhou M1 shield tunnel project,the tunnel model is finely designed using 3D printing technology,and the lining segments are connected with curved bolts to restore their detailed structure.By loading the 3D printed tunnel model to eight levels in longitudinal and transverse directions,the longitudinal and transverse stiffness efficiency of different assembly processes is determined.At the same time,ellipticityφ is used to specifically describe the lateral deformation degree of the tunnel under different external loads.Finally,by comparing with the model experiments of other scholars,the feasibility and accuracy of this method are demonstrated.[Result & Conclusion] The longitudinal stiffness efficiency of the through-seam shield tunnel made by 3D printing is between 0.13~0.20,and the transverse stiffness efficiency is 0.67;the longitudinal stiffness efficiency of the staggered seams is between 0.15~0.30,and the transverse stiffness efficiency is 0.79.The stiffness of staggered-seam tunnel is slightly greater than that of the through-seam tunnel.The ellipticities of the homogeneous tunnel,the staggered-seam shield tunnel and the through-seam shield tunnel are 1.62‰,1.87‰ and 2.55‰ respectively.The through-seam tunnel model has the greatest degree of flattening under external loading.

关 键 词：盾构隧道 刚度有效率 3D打印模型试验 通缝及错缝拼装 

分 类 号：U451.5[建筑科学—桥梁与隧道工程]