大跨扁平连拱隧道复合式中墙优化研究  

Study of Optimization of Composite Middle Wall in Large Span and Flat Multi-arch Tunnel

作　　者：吴梦军[1,2] 蒋树屏[2] 张永兴[1] 李彤 

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]招商局重庆交通科研设计院有限公司,重庆400067 [3]肇庆市广贺高速公路有限公司,广东肇庆526200

出　　处：《公路交通科技》2010年第2期85-90,共6页Journal of Highway and Transportation Research and Development

基　　金：广东省交通厅科技计划资助项目(200721)

摘　　要：为确保隧道施工安全、减少开挖跨度和节约工程投资,针对某依托工程,首先通过ADINA有限元数值模拟,对不同中墙形状下隧道中墙的受力与变形特征进行了分析,选取了复合式中墙最佳形状,在此基础上,对不同中墙厚度时围岩位移、中墙位移与中墙应力等变化全过程进行了研究,并通过现场监控量测对数值模拟结果进行了对比和验证分析。优化了大跨扁平连拱隧道中墙形状,提出了中墙配筋的关键控制因素和Ⅴ级围岩地段合理中墙厚度。In order to assuring the safety of construction, reduce the digging span and economize the engineering investment, by using finite element software ADINA in a certain support engineering, the development rules of middle wall stress and strain in different middle wall shapes were simulated and analysed to choose the optimized composite middle wall shape. On this basis, the variation process of displacement and stress of middle walls with different thicknesses and the corresponding displacements of surrounding rock were researched, and the simulation result was compared and verified by field monitoring. Thus the middle wall shape was optimized, the key control factor of reinforcement and the reasonable thickness of middle wall at surrounding rock grade V were put forward.

关 键 词：隧道工程 中墙优化 有限元 现场监测 复合式中墙 大跨扁平隧道 

分 类 号：U452.25[建筑科学—桥梁与隧道工程]