特长高速公路隧道通风斜井钢波纹板式中隔墙技术研究  

Application of the Middle Partition Wall Made of the Steel Corrugated Plate in Inclined Ventilation Shafts of Extra-long Highway Tunnels

作　　者：赵威 张科[1,2] 郭春 ZHAO Wei;ZHANG Ke;GUO Chun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu 610031)

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《现代隧道技术》2022年第2期132-140,共9页Modern Tunnelling Technology

基　　金：“十三五”国家重点研发计划(2019YFC0605104);成都哲学社会科学规划项目(2019CS107);成都市科技项目(2019-YFYF-00121-SN,2020-RK00-00025-ZF);四川省教育科研资助金项目(2020597).

摘　　要：通风导洞中隔墙一般采用技术较为成熟的混凝土中隔墙,但存在表面粗糙、工艺复杂、施工进度不易控制等缺点,无法适用于风道较为复杂的工程。文章以东天山隧道1号斜井为依托,提出了节能型全拼装式钢波纹板中隔墙技术,通过数值模拟以及理论计算的方法验证其在单洞四风道通风斜井中的可行性。研究结果表明:钢波纹板式中隔墙增大了斜井有效通风截面积,断面风速降低约5.3%,同时大幅减小通风斜井内的沿程阻力,仅为既有混凝土墙方案的17%左右;拱顶变形及二次衬砌混凝土结构受力均远低于结构安全限值。该技术克服了传统钢筋混凝土中隔墙的缺点,在满足隧道通风防灾要求的同时,改善了隧道施工环境,且施工工期可缩短为原方案的三分之一。As a mature technology,the middle partition wall made of the concrete is generally used for pilot headings with the purpose of ventilation.However,it comes with various shortcomings,such as rough surface,complex tech⁃nics and uncontrolled construction progress,making it difficult to be applied to tunnel projects with complex air ducts.Taking the No.1 inclined shaft of East Tianshan Tunnel as the background,this paper proposes an energysaving and fully-assembled construction technology for the partition wall made of the steel corrugated plate,and veri⁃fies its application feasibility in a single-tube four-duct inclined ventilation shaft through numerical simulation and theoretical calculation.The results show that using the partition wall made of the corrugated steel plate,it increases the effective ventilation sectional area of the inclined shaft and reduces the sectional wind speed by about 5.3%,while also significantly reducing the on-way ventilation resistance along the inclined shaft,which is only about 17%of the ventilation resistance of the existing concrete partition wall scheme.Also,the vault deformation and structure stress of the secondary concrete lining are far below the limits regarding the structural safety.This technology over⁃comes the shortcomings of traditional partition wall made of reinforced concrete,and improves the tunnel construc⁃tion environment while meeting the requirements for tunnel ventilation and disaster prevention.Furthermore,the construction time can be shortened to one-third of the existing scheme.

关 键 词：特长公路隧道 中隔墙 四分隔风道通风斜井 钢波纹板 装配式结构 

分 类 号：U454[建筑科学—桥梁与隧道工程]