单向四车道特大断面公路隧道断面优化研究  

Study on section optimization of single-hole four-lanehighway tunnel with extra-large section

作　　者：张玉凤 赵瑞传 张素磊[1] ZHANG Yufeng;ZHAO Ruichuan;ZHANG Sulei(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China;CCCC Highway Consultants Co.Ltd.,Beijing 100010,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525 [2]中交公路规划设计院有限公司,北京100010

出　　处：《青岛理工大学学报》2024年第4期16-23,共8页Journal of Qingdao University of Technology

基　　金：国家自然科学基金资助项目(51978356)。

摘　　要：随着我国城市化进程的高速发展,传统单向两车道隧道已满足不了现有交通运输需求,特大断面隧道建设规模日渐增大。依托山东省某单向四车道特大断面隧道工程,利用ABAQUS进行数值模拟,研究并得出了8组不同扁平率下隧道围岩变形和支护结构受力变化规律,确定出隧道合理扁平率范围。研究结果得出当扁平率为0.66~0.70时,隧道断面受力较均衡,支护结构稳定性较好,并且隧道开挖费用较低。本特大断面隧道断面优化方法可为今后同等条件下公路隧道内轮廓设计提供参考。With the rapid development of China’s urbanization process,the traditional unidirectional two-lane highway tunnel cannot meet the existing transportation demands,and the construction scale of tunnel with extra-large section is increasing day by day.Based on the project of a single-hole four-lane highway tunnel with extra-large section in Shandong Province,this paper obtains the change regulations of tunnel surrounding rock deformation and supporting structure under 8 different groups of flat ratios and determines the reasonable flat ratios range of the tunnel.The results show that when the flat ratio is located at 0.66—0.70,the force of tunnel section is more balanced,the supporting structure is more stable,and the tunnel excavation cost is lower.In this paper,the optimization method of tunnel with extra-large section can provide references for the internal profile design of highway tunnel under the same conditions.

关 键 词：隧道工程 断面优化 数值模拟 扁平率 二次衬砌 特大断面 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]