在某些合适的已有建筑如前几年建的低层建筑上增加一层或数层 ,变低层建筑为高层建筑的办法是一条多快好省、经济有效的途径。不宜在一些低矮破旧 ,无保留价值的建筑上进行加层改建。在进行加层工程中还应当注意加层后建筑的立面造型等。加层工程由于建筑对象各不相同 ,建筑单位要求也不一样 ,在设计中需采取非常灵活的结构思路 ,不断创造出新型的结构体系和施工方法 ,促进加层技术的发展 In some suitable existing buildings as built in previous years, low-rise buildings to add one or more layers, low-rise buildings into high-rise building approach is a more economical, cost-effective way. It is not advisable to add floorings to some dilapidated and unreserved buildings. In the process of additional layer should also pay attention to the building after the addition of floor shape and so on. Due to the different objects of construction, the requirements of construction units are also different. In the design, we need to adopt a very flexible structure idea to continuously create new structural systems and construction methods to promote the development of additional layer technology