基于钢板加固的盾构隧道管片衬砌承载性能数值模拟研究  

Numerical Simulation Study on the Bearing Capacity of Segmental Lining in Shield Tunnels Reinforced with Steel Plates

作　　者：彭武 PENG Wu(Jiangxi Highway Research and Design Institute Co.,Ltd.,Nanchang Jiangxi 330000,China)

机构地区：[1]江西省公路科研设计院有限公司,江西南昌330000

出　　处：《交通节能与环保》2024年第6期254-261,共8页Transport Energy Conservation & Environmental Protection

基　　金：江西省交通运输厅科技项目(2023H0018)。

摘　　要：为了提高隧道衬砌的耐久性和安全性,本研究通过数值模拟方法,评估钢板加固对盾构隧道衬砌结构损伤和变形的抑制效果,对加固和未加固的盾构隧道衬砌结构在不同荷载比下的变形和承载力进行了对比分析。研究结果表明:(1)加固后的衬砌结构在荷载作用下的变形被显著抑制,当荷载比为0.6时,加固衬砌的竖向收敛和水平扩张分别比未加固衬砌减小了71.4%和68.3%;(2)加固衬砌在不同荷载比下的性能表现出明显的优势,尤其在荷载比为1.24时,加固衬砌的极限承载力提升了24%,极限变形程度减小了30%左右;(3)通过对加固时机前后衬砌结构的破坏过程进行详细分析,揭示了钢板加固在抑制裂缝扩展和提高衬砌刚度方面的显著效果。To enhance the durability and safety of tunnel linings,this study employs numerical simulation methods to evaluate the effectiveness of steel plate reinforcement in mitigating damage and deformation of shield tunnel linings.Comparative analyses were conducted on the deformation and bearing capacity of both reinforced and unreinforced shield tunnel linings under different load ratios.The results indicate that:(1)the deformation of the reinforced lining structure is significantly suppressed under load,with vertical convergence and horizontal expansion reduced by 71.4%and 68.3%respectively,compared to the unreinforced lining at a load ratio of 0.6;(2)the reinforced lining demonstrates superior performance under various load ratios,particularly at a load ratio of 1.24,where the ultimate bearing capacity is increased by 24%and the ultimate deformation is reduced by approximately 30%;(3)detailed analysis of the failure process before and after reinforcement reveals that steel plate reinforcement is highly effective in controlling crack propagation and increasing the stiffness of the lining.

关 键 词：隧道工程 钢板加固 数值模拟 盾构衬砌 承载力评估 

分 类 号：U457[建筑科学—桥梁与隧道工程]