长期以来,多层民用建筑改建、扩建为商业、餐厅等功能的改造设计,是建筑设计技术中的灰色地带,多由室内装饰设计代为主导施行。本文结合工程实例,对改造建筑的技术特征,进行了较为系统的总结,重点阐述了改造设计各阶段主要的建筑、消防、节能设计与计算要点,提出了施工中必须加以重视和解决的主要技术问题。 For a long time, the reconstruction and expansion of multi-storey civil buildings have been transformed into the design of commercial, restaurant and other functions. They are the gray areas of architectural design technology and are mostly implemented by interior decoration design. Based on the engineering examples, this paper summarizes the technical features of the retrofitted buildings systematically. The main points of design, construction, fire fighting, energy saving design and calculation of each stage of retrofit design are emphatically elaborated. The main techniques that must be paid attention to and solved in construction are put forward. problem.