在我国人多地少的情况下,原有建筑的加层改造对缓解城市建设用地紧张,加快城区改造都具有现实意义,是适合我国国情和经济技术条件的一项利国利民的技术政策。但其中也存在许多施工技术上的问题。本文通过实例,介绍了对原有建筑改造工程的施工技术,并分析了在改造过程中需解决的问题,最后列举可该工程后建基础与原基础的节点做法及框架柱与原基础圈梁的连接构造做法,供工程施工参考。 In the absence of more people and less land, the renovation of the original buildings will have practical significance for alleviating the urban construction land shortage and speeding up the urban renewal. It is a technology policy that is suitable for the benefit of our country and the economy and technology. . However, there are also many construction technical problems. This paper introduces the construction technology of the original building renovation project through examples and analyzes the problems to be solved in the reconstruction process. Finally, it gives a list of the node practices that can be used to build the foundation and the original foundation of the project, The connection construction practices for construction reference.