超大断面富水黄土隧道拱墙二次衬砌混凝土灌注施工技术研究  

Study on Construction Technology of Secondary Lining Concrete for Arch Wall of High-water Loess Tunnel

作　　者：李飞川 Li Feichuan(China Railway 12th Bureau Group First Engineering Co.Ltd.,Xi'an,Shaanxi 710038)

机构地区：[1]中铁十二局集团第一工程有限公司,陕西西安710038

出　　处：《江西建材》2023年第11期310-312,共3页Jiangxi Building Materials

摘　　要：混凝土灌浆是隧道拱墙二次衬砌施工的重要环节,超大断面富水黄土隧道拱墙二次衬砌施工难度较高,因此,可通过超前支护、防水混凝土配合比设计与制备、混凝土喷注完成二次衬砌混凝土灌注施工。分析结果表明,混凝土抗拉强度与强度安全系数均大于最小限值,符合相关规范要求,设计技术能够保证施工质量,可为同类工程提供借鉴。Concrete grouting is an important part of the secondary lining construction of tunnel arch walls.The construction difficulty of the secondary lining of super large section water rich loess tunne larch walls is relatively high.Therefore,the secondary lining concrete pouring construction is completed through advanced support,waterproof concrete mix design and preparation,and concrete spraying.The example analysis results show that the tensile strength and strength sfaety factor of concrete are both greater than the minimum lim,i twhich meets the requirements of relevant specifications.The design technology can ensure construction quality and provide reference for similar projects.

关 键 词：高速铁路 超大断面 富水黄土隧道 二次衬砌 混凝土灌注 超前支护 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]