公路隧道衬砌防裂钢筋网效用研究  

Study on Efficiency of Anti-Crack Reinforcement Mesh for Road Tunnel Lining

作　　者：林海洋 LIN Haiyang(Wenzhou Institute of Transportation Plan,Design and Research,Wenzhou 325011,China)

机构地区：[1]温州市交通规划设计研究院

出　　处：《交通科技》2019年第6期43-47,共5页Transportation Science & Technology

摘　　要：为分析防裂钢筋网提高隧道衬砌结构抗裂性能的机理和幅度,以双车道隧道III级和V级围岩衬砌结构为研究对象,采用荷载结构法和杆系有限元数值模拟,获得素混凝土结构开裂的临界荷载、进而获得配置钢筋网的衬砌结构达到0.2 mm裂缝宽度时的临界荷载。分析表明,配置防裂钢筋网后,III级和V级围岩衬砌结构的抗裂性能分别提高22.4%和15.2%,抗裂效果明显。In order to quantitatively analyze the mechanism and extent of anti-crack reinforcement mesh improving the crack resistance of tunnel lining structure,taking the surrounding rock lining structure of grade III and V of double-lane tunnel as the research object,the critical load of cracking of plain concrete structure is obtained by using load structure method and finite element numerical simulation,and then the critical load of lining structure with reinforcement mesh when the crack width reaches 0.2 mm is obtained.The analysis shows that the crack resistance of lining structure in grade III and V surrounding rock increases by 22.4%and 15.2%respectively after the anti-crack reinforcement mesh is deployed.It can be seen that the crack resistance effect is obvious.

关 键 词：隧道衬砌 防裂钢筋网 数值分析 机理 

分 类 号：U456.2[建筑科学—桥梁与隧道工程]