高震区软弱地基下大型沉管隧道混凝土性能研究  

Study on Concrete Property of Large Immersed Tunnel Under the Soft Foundation in the Highly Seismic Region

作　　者：王朝辉[1] WANG Chaohui(The th Engineering Co.,Ltd.of China Railway th Bureau（Group）,Tianjin 300459,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300459

出　　处：《施工技术》2018年第16期52-55,85,共5页Construction Technology

摘　　要：天津市滨海新区中央大道海河隧道,是我国高震区、软质条件下的首座沉管隧道,沉管管段每节混凝土方量达12 000m^3,具有大体积薄壁多孔箱形混凝土结构特性,管节以自防水为主,混凝土裂缝宽度≤0.15mm,在22m腐蚀性海水下使用100年,混凝土性能研究至关重要。通过分析沉管隧道混凝土耐久、抗裂等性能,确保了工程安全质量。Haihe Tunnel on Central Avenue in Tianjin Binhai New Area is the first immersed tube tunnel under highly seismic region and soft condition in China. The concrete square amount per-section of the immersed tube section is 12 000 m^3. It has the characteristics of large volume thin-walled and multi-hole concrete structure. The pipe joint is self-waterproof, the width of concrete crack can not exceed 0. 15 mm,and the corrosive seawater in 22 m is corrosive. For 100 years, the study on concrete performance is very important. Through the analysis of durability and crack resistance of immersed tube tunnel,the safety and quality of the project are ensured.

关 键 词：隧道工程 沉管隧道 混凝土 耐久性 防裂性 配合比 试验 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]