港珠澳大桥清水混凝土施工足尺模型试验研究

摘要

为提升整体景观效果，港珠澳大桥岛上段隧道敞开段墙身、挡浪墙及岛上房建采用清水混凝土工艺。由于清水混凝土在国内应用不多，缺乏施工经验，为确保施工品质及工程目标实现，针对清水混凝土施工技术及影响观感的各环节，在现场开展系统的足尺模型试验。通过系统试验，掌握了施工过程中的各项参数，并形成量化指标，以指导现场施工。%In order to enhance the overall landscape effect, fair-faced concrete was used on tunnel walls, wave walls and the buildings on the artificial islands of Hongkong-Zhuhai-Macao Bridge. As fair-faced concrete was not much used in China, the builders had no much experience in construction of the fair-faced concrete.In order to ensure the quality of concrete construction and the project goals, systematic full-scale model testing was carried out on site to assess and ascertain the technology for fair faced concrete construction and various links affecting the external appearance. Through the systematic full scale model tests, various parameters in the process of construction were achieved and transformed into quantitative indicators to guide the construction on site.