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一、背景钢筋连接是土建工程中一项量大面广的重要施工技术,它直接影响工程结构的安全、质量、速度和效益。钢筋工程的技术落后状况曾长期困扰着我国土建行业,改革开放以来,我国粗钢筋连接技术有了飞速发展。近年来,推广应用了电渣压力焊、气压焊和窄间隙电弧焊,对节约钢材、降低成本、提高建筑工业化程度起了良好作用。以φ28mm钢筋为例,焊接一个接头可节约钢材4.5kg,降低成本80%,全国每年用数亿
I. Background Reinforced concrete connection is an important and extensive construction technique in civil engineering. It directly affects the safety, quality, speed and benefit of engineering structure. The technical backwardness of the reinforcement project has plagued the civil construction industry in our country for a long time. Since the reform and opening up, the connection technology of the crude reinforcement in our country has been developing rapidly. In recent years, the promotion and application of ESR, gas pressure welding and narrow gap arc welding, to save steel, reduce costs and improve the degree of industrialization of buildings played a good role. To φ28mm rebar, for example, a joint welded steel can be saved 4.5kg, reduce costs 80%, the national annual with hundreds of millions