摘要
高速公路边坡内偏压连拱隧道结构因地质条件或施工工艺等原因常出现墙壁开裂、拱变形等工程质量问题。为保障隧道结构安全,基于某连拱隧道结构工程及其特点,设计拱壁粘钢加固与型钢拱架加固两种加固方案,通过采用ANSYS软件数值建立数值模型,对比分析隧道结构加固前后围岩与隧道拱结构的应力应变特征并验证加固方案,计算结果表明,两种加固方案均可实现减小结构变形、降低结构应力的目标,结合工程实际施工环境和加固工艺措施,建议采取粘钢加固与型钢拱架结合的方式进行加固治理。研究结果可为类似结构设计与施工提供借鉴与参考。
Due to geological conditions or construction techniques,there are often engineering quality issues such as wall cracking and arch deformation in the unsymmetrical pressure multi arch tunnel structure within the slope of highways.In order to ensure the safety of bearing capacity of double arch tunnel,based on the structural engineering of a multi arch tunnel and its structural characteristics,two reinforcement schemes are designed which are the steel bonding reinforcement of the arch wall and the steel section arch reinforcement.By using the ANSYS,the numerical model is established to compare and analyze the mechanical characteristics of the tunnel and the surrounding rock due to the reinforcement being applied.The simulation results indicate that two reinforcement schemes can both reduce the structural deformation.The goal of reducing structural stress is to comprehensively consider the construction environment and reinforcement process measures.It is recommended to adopt a combination of steel reinforcement and shaped steel arch frame for the double arch tunnel.The research results can provide reference for the design and construction of similar structures.
作者
王雄
刘晓祥
毕钛俊
WANG Xiong;LIU Xiaoxiang;BI Taijun(Yunnan Communications Investment Group Investment Co.,Ltd.,Kunming,Yunnan 650000,China;Yunnan Communications Investment Group Highway Construction Co.,Ltd.,Kunming,Yunnan 650000,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China)
出处
《水利与建筑工程学报》
2023年第4期173-179,共7页
Journal of Water Resources and Architectural Engineering
基金
复合式中墙连拱隧道单洞工法施工病害防治关键技术研究(云交科教[2019]79)。
关键词
连拱隧道
应力
变形
加固
数值模拟
double arch tunnel
stress
deformation
reinforcement
numerical simulation
