沉管工厂化预制技术在港珠澳大桥工程中的应用

摘要

港珠澳大桥遂道工程是目前世界上外海条件下埋深最深的沉管隧道工程，该沉管隧道断面大、管节质量大、混凝土抗裂要求高，在国内首次采用了工厂化预制工艺进行沉管管节的预制。由于预制工艺复杂，项目前期进行了深入的研究，并进行了众多工艺的改进和创新。介绍了工厂法预制的工艺及关键技术和应用情况。%Hong Kong-Zhuhai-Macau Bridge project is the deepest buried depth of immersed tunnel in the open sea.The tubes in this project have large cross sections,heavy weight,and high standard of crack resistance of concrete.It is the first one using industrial prefabricated immersed tubes for tunnel construction in China .Due to complexities of the prefabrication technology,deep studies were made to develop various improvements and innovations.This paper mainly outlines the industrial prefabrication technology and its application .