港珠澳大桥检修道清水混凝土预制工艺

Prefabrication technology of faced concrete for curbs of Hong Kong-Zhuhai-Macao Bridge

港珠澳大桥岛隧工程隧道检修道位于沉管隧道内行车道两侧,用于运营过程中紧急检修人员行走通道,同时兼做路缘石功能、供反光标示牌安放、管线铺设、排水等功用,采用钢筋混凝土预制安装工艺,通过工厂法进行构件预制运往现场安装,构件采用清水混凝土体系,即工厂内预制成型的外观质量直接呈现,结构成型后不做任何修饰处理,这对预制工艺和现场管理都是一项极大的考验,本项目检修道清水混凝土构件的成功应用在行业内引起了巨大的反响,得到了各界关注与认可。文章主要针对检修道小型构件在工厂内基于清水混凝土工艺施工进行阐述,供后续类似工程参考。

The tunnel inspection road of the Hong Kong-Zhuhai-Macao Bridge Island Tunnel Project is located on both sides of the inner lane of the immersed tunnel. It is used for the emergency maintenance personnel walking passage during the operation. It also serves as the curb function,for reflective signage,pipeline laying and drainage. The reinforced concrete prefabrication installation process is adopted. The prefabricated components are transported to the site for installation through the factory method. The components are made of clear water concrete system,that is,the appearance quality of the prefabricated type in the factory is directly presented,and the structure is formed without any modification treatment. This is the prefabrication process and the site. Management is a great test. The successful application of clear water concrete components in this project has caused great repercussions in the industry and has received attention and recognition from all walks of life. This paper mainly describes the small-scale components of the overhaul road in the factory based on the construction of clear-water concrete process,for reference for subsequent similar projects.