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门式脚手架是一种功能较多的施工工具。但在现浇混凝土楼板(顶板)施工中作为支模架使用时,不论是国内的还是国外的,由于门架横梁的刚度小、承载力低,都存在不允许在其中部施加较大的集中荷载的问题,给施工和使用带来诸多不便。北京市建筑工程研究所针对这个问题于1989年提出了一种新型门式脚手架——GZM门式脚手架。这种门式脚手架经过两年多的试验研究和初步应用,于1991年12月由北京市科委组织并主持通过了技术鉴定,1992年4月正式生产,在北京、山西、广东、安徽、江西等省市扩大应用。 1 GZM门式脚手架的性能和特点门式脚手架的性能与特点主要是由单片门架的性能和特点所决定的。与现有门式脚手架相比,新
Portal scaffolding is a more versatile construction tool. However, when used as a formwork support in the construction of cast-in-situ concrete slabs (top slabs), both domestic and foreign, due to the low stiffness of the crossbeams of the gantry and the low bearing capacity, there is no possibility of imposing a large concentration in the middle part. The problem of loading brings a lot of inconvenience to construction and use. In 1989, the Beijing Institute of Construction Engineering proposed a new type of portal scaffolding, the GZM portal scaffolding. After more than two years of experimental research and preliminary application, this portal scaffold was organized and presided over by the Beijing Science and Technology Commission in December 1991 and passed technical appraisal. It was officially produced in April 1992 in Beijing, Shanxi, Guangdong and Anhui. Jiangxi and other provinces and cities to expand the application. 1 Performance and Features of the GZM Portal Scaffold The performance and characteristics of the portal scaffold are mainly determined by the performance and characteristics of the monolithic mast. Compared with existing portal scaffolding, new