双向六车道连拱隧道复合式中墙宽度优化  

Optimization Study of Composite Middle Wall Width in 6 Lane Multi-arch Tunnel

作　　者：吴梦军[1] 靳晓光[2,3] 李炘彤 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]重庆大学土木工程学院,重庆400045 [3]山地城镇建设与新技术教育部重点实验室(重庆大学),重庆400045 [4]肇庆市广贺高速公路有限公司,广东肇庆526200

出　　处：《地下空间与工程学报》2012年第3期538-542,629,共6页Chinese Journal of Underground Space and Engineering

基　　金：广东省交通厅科技计划资助项目(2007-21)

摘　　要：大跨扁平连拱隧道中墙宽度不仅直接影响隧道的开挖跨度和工程量,而且还影响着围岩-支护结构及其本身的稳定性。为确保隧道施工安全、减少开挖跨度和节约工程投资,结合广(州)贺(州)高速公路沙塘坑双向六车道连拱隧道设计和施工工程实际,以V级围岩为例,采用三维有限元数值模拟方法,对大跨扁平连拱隧道复合式中墙宽度进行优化研究。结合现场监控量测资料的分析,验证提出的复合式中墙宽度(d)的合理性,为依托工程或类似工程的设计、施工提供了依据与借鉴。The composite middle wall width of large span and flat multi-arch tunnel not only affects the tunnel＇ s dig span and quantities directly, but also affects the stability of surrounding rock-support structure and middle wall itself. In order to assure the safety of construction, reduce the dig span and economize the engineering investment, combining the project of Shatangkeng bidirectional 6 lane multi-arch tunnel on Guang-He highway, in the research a 3-dimension finite element simulation method was applied to study the optimization of composite middle wall width of large span and flat multi-arch tunnel. By analyzing the field monitoring data, the rationality of chosen composite middle wall width was proved, and the conclusion provided the gist and reference for the design and construction of sample project and similar project.

关 键 词：连拱隧道 复合式中墙 有限元 现场监测 

分 类 号：U452.25[建筑科学—桥梁与隧道工程]