南京南站清水混凝土表观质量施工控制研究

研究目的:南京南站站房大量采用清水混凝土墙面、柱面、顶棚,部分区域采用装饰清水混凝土,在施工过程中,由于南京南站的站房结构的特点和清水混凝土表观质量的要求,遇到诸多实际工程难题,因此有必要对清水混凝土表观质量施工控制技术进行研究.针对目前清水混凝土国内尚无统一的清水混凝土施工质量标准和质量验收标准,通过归纳清水混凝土常见表观质量缺陷原因,在分析南京南站项目工程特点的基础上,借鉴以往工程的经验,制定清水混凝土表观质量控制标准和施工控制措施,应用在实际工程中,确保清水混凝土施工的顺利完成.研究结论:(1)通过南京南站现场检验,制定的清水混凝土外观质量标准、表面质感控制标准和装饰效果控制标准,可以有效地保障清水混凝土表观质量,满足铁路站房清水混凝土表观质量的要求.(2)从测量放线、混凝土工程、钢筋工程、模板工程四方面对清水混凝土进行施工控制,可以有效地避免清水混凝土表观质量缺陷的产生.

Research on Apparent Quality Control of Fair-faced Concrete of Nanjing South Station

Research purposes: Lots of the fair-faced concrete walls,fair-faced cylinders and fair-faced roofs were used for the Nanjing South Station,and the decorative faced concrete was also used in the some areas of the station.During the construction process,there were many engineering problems because of the structural features of the Nanjing South Station and the requirements of fair-faced concrete apparent quality,so it was necessary to study the apparent quality control technology of the fair-faced concrete.As there was no domestic fair-faced concrete quality standards and quality acceptance criteria,the fair-faced concrete construction control standards and measures were formulated through summing up the common surface quality defects of fair-faced concrete,analyzing the project characteristics of the Nanjing South Station and learning the experience of past projects to ensure fair-faced concrete quality for the Nanjing South Station. Research conclusions:(1) The in-site test of the Nanjing South Station shows formulating the apprent quality standards,the surface texture control standards and the decorative effect control standards can effectively ensure the apparent quality of the Nanjing South Station and meet the fair-faced concrete apparent quality requirements of railway station building.(2)The construction quality is controlled from the aspects of the survey,the concrete engineering,the reinforcing bar engineering and the moulding engineering to effectively avoid the appearance of the apparent quality defects of the fair-faced concrete.