TBM预制管片混凝土养护工艺对比试验分析  

Analysis of Comparative Experiment on Concrete Curing Process of TBM Precast Segments

作　　者：刘海威 LIU Haiwei(China Energy Engineering Group Guangxi Hydroelectric Construction Bureau Co.,Ltd.,Nanning,Guangxi Zhuang Autonomous Region,530001 China)

机构地区：[1]中国能源建设集团广西水电工程局有限公司,广西南宁530001

出　　处：《科技资讯》2024年第23期168-171,共4页Science & Technology Information

摘　　要：以菲律宾卡利瓦大坝项目的引水隧洞工程为背景,在引水隧洞施工中,采用了先进的双护盾隧洞掘进机(Tunnel Boring Machine,TBM)的掘进施工技术,其中,混凝土预制管片生产是保障整体隧洞施工顺利进行的决定性因素之一。通过前期的优化配合比设计与一系列的试验,结合当地气候条件,对TBM预制管片采用免蒸养工艺,对免蒸养工艺条件下的混凝土强度、耐久性等性能进行试验统计分析。对比蒸养工艺和免蒸养工艺的优缺点,从经济、强度、耐久性等方面进行比选。This paper takes the diversion tunnel project of Kaliwa Dam project in Philippines as the background.Advanced double-shield Tunnel Boring Machine(TBM)tunneling technology is adopted in the diversion tunnel construction,among which the production of precast concrete pipe segment is one of the decisive factors to ensure the smooth progress of the overall tunnel construction.Through the preliminary optimization of mix ratio design and a series of experiments,combined with the local climate conditions,the TBM precast pipe segment adopts the steam free curing process,and the strength,durability and other properties of concrete under the steam free curing process condition are analyzed statistically.The advantages and disadvantages of steam curing process and steam free curing process were compared from the aspects of economy,strength and durability.

关 键 词：管片混凝土 配合比 基本参数 外观质量 免蒸汽养护 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]