The common disadvantage of these methods is that the proceeding of construction need large space as a result the other parts of the structure construction ca n ' t go on at the same time 前者需要大量的脚手架料，后者依赖吊装、提升设备；而且大都存在占用室内施工面，难以同步进行室内施工。因此，逐条积累滑移法应运而生。
