在城区内建造住宅,往往需要先行拆除旧有的房屋或其他构筑物。如果这些需要拆除的对象位于人口稠密的市区或者交通要道口,拆除施工时,既不能伤害行人和损坏周围的建筑设施,也不能影响交通运行,在这种情况下,一般都是求助于人工硬凿锤打。当然这也不失为方法之一,但是其工效实在太低,尤其在拆除钢筋混凝土结构物或高大危房时,不仅费工费时,而且施工安全难以保障。因此,在进行城市住宅修建时,既要研究“建”还要考虑“拆”; Building residential houses in urban areas often requires the demolition of old houses or other structures. If these objects to be demolished are located in densely populated urban areas or at traffic crossings, they must not be used to injure pedestrians, damage surrounding construction facilities, or affect traffic operations when demolition works are performed. In such cases, they are generally resorting to labor. Hard chisel hammered. Of course, this can be one of the methods, but its working efficiency is too low, especially in the removal of reinforced concrete structures or tall dangerous buildings, not only time-consuming, but also difficult to guarantee construction safety. Therefore, when building urban housing, it is necessary to study “construction” and consider “removal”.