格构技术在高铁隧道拱部防水板切割衬砌混凝土缺陷整治中的应用  

Application of Lattice Technology in Defect Rectification for Waterproof Board Cutting Lining Concrete at High-speed Railway Tunnel Arch

作　　者：龚伦[1,2] 龚兴旺 王立川 梁明[5] 刘志强 樊永杰[7] 张学民 GONG Lun;GONG Xingwang;WANG Lichuan;LIANG Ming;LIU Zhiqiang;FAN Yongjie;ZHANG Xuemin(School of Civil Engineering,Southwest Jiaotong University,610031,Chengdu,China;Key Laboratory of Ministry of Transportation Tunnel Engineering Education,610031,Chengdu,China;China Railway 18th Bureau Group Co.,Ltd.,300222,Tianjin,China;School of Civil Engineering,Central South University,410075,Changsha,China;Qilu Transportation College,Shandong University,250002,Jinan,China;China Railway Southwest Science Research Institute Co.,Ltd.,611731,Chengdu,China;China Railway Chengdu Group Co.,Ltd.,610082,Chengdu,China)

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]交通隧道工程教育部重点实验室,成都610031 [3]中铁十八局集团有限公司,天津300222 [4]中南大学土木工程学院,长沙410075 [5]山东大学齐鲁交通学院,济南250002 [6]中铁西南科学研究院有限公司,成都611731 [7]中国铁路成都局集团有限公司,成都610082

出　　处：《城市轨道交通研究》2024年第9期242-248,共7页Urban Mass Transit

摘　　要：[目的]许多与高铁隧道衬砌相关的缺陷随着高铁建成年限的增加逐渐凸显,防水板切割衬砌混凝土是其中较为严重的一种缺陷。为了减少结构扰动、降低对线路运行的影响,需采用新技术对高铁隧道拱部防水板切割衬砌缺陷进行整治。[方法]以我国西南地区某设计速度为200 km/h的高铁双线隧道为案例,对其发生拱部防水板切割衬砌混凝土后可采用的2个整治方案(现浇套拱、格构技术)进行了详细分析,并进行了结构的安全性、经济性对比评估。对格构技术缺陷整治方案的施工组织、工艺流程、防护措施及施工效果进行了重点论述。[结果及结论]与其他方案相比,格构技术整治方案充分利用了既有结构的承载能力,仅在局部区域修复隧道,对既有衬砌结构影响较小,对高铁线路的运营影响也较小。该方案能明显降低结构的主应力,减少结构位移,使缺陷衬砌的承载能力满足设计要求。[Objective]Many defects related to the lining of high-speed rail tunnels gradually become prominent with the increase of the high-speed rail construction completion years.The waterproof board cutting lining concrete is one of these serious defects.In order to reduce the structural disturbance and the above defects impact on line operation,new technologies need to be used to rectify the waterproof board cutting lining defects in the arch of high-speed rail tunnel.[Method]Based on a dual-line high-speed railway tunnel with a design speed of 200 km/h in southwest China,two adoptable treatment schemes(cast-in-place arch and lattice technology)after its arch waterproof board cutting the lining concrete are analyzed in detail.A comparative assessment of the safety and economy of the structure is also carried out.The construction organization,process flow,protective measures and construction effects of the defect rectification scheme using lattice technology are emphatically discussed.[Result&Conclusion]Compared with other schemes,the lattice technology rectification scheme makes full use of the existing structure bearing capacity,repairs the tunnel only in a local area with little impact on both the existing lining structures and the high-speed railway line operation.This scheme can significantly reduce the main stress and displacement of the structure,and make the bearing capacity of the defective lining meet the design requirements.

关 键 词：高铁隧道 格构技术 防水板切割衬砌 缺陷整治 

分 类 号：U457[建筑科学—桥梁与隧道工程]