近年来,随着经济的增长和百姓生活水平的日益提高,人们对建筑空间的需求也在快速地膨胀,特别是在大中城市,土地资源变得日益紧缺。许多建筑物受建造时的经济条件和技术条件的制约,在建筑功能的完善和建筑结构的形式等方面已不能满足时代要求,通过采用加层的方法改造原有房屋中结构质量较好的部分,从而达到经济、适用、快捷的建房目的。 In recent years, with the economic growth and people’s living standards increasing, people’s demand for building space is also rapidly expanding, especially in large and medium-sized cities, land resources become increasingly scarce. Many buildings are constrained by the economic conditions and technical conditions during the construction. They can not meet the requirements of the times in terms of building function improvement and building structure. By adopting the method of adding layers, the quality of the existing buildings is improved , So as to achieve economic, applicable and efficient purpose of building.