建筑模板支撑的历史
History of building formwork support
1. 早前的模板支撑架多由木制棒材或者铁制管材制成，受其尺寸的限制，其高度不具有可调性；
1. In the early days, the formwork support frame was mostly made of wood bar or iron pipe, and its height was not adjustable due to its size;
2. 其后的模板支撑架普遍采用钢或木梁拼装成模板托架，利用钢或木杆搭建成脚手架构成托架支撑，并配合钢模板进行混凝土施工。框格护坡模具 箱体护坡模具 华尔街铜牛 电阻柜 接地电阻柜 电缆保护接地箱 隔离墩模具 化粪池模具其存在的问题是拼装和搭建工作量大、施工效率低、费工费料、质量差、浪费资源、不美观且难以调整。
2. Steel or wood beams are generally used to assemble the subsequent formwork support frame, and steel or wood poles are used to build the scaffold to form the bracket support, and the steel formwork is used for concrete construction. The existing problems are heavy workload of assembly and construction, low efficiency of construction, cost of labor and materials, poor quality, waste of resources, unsightly and difficult to adjust.
3. 模板支撑架已经出现像钢性模板支撑组合结构这样的具有可伸缩性并且重复利用的全钢制支架，它由伸缩套管、螺杆、螺纹座和插销，螺纹座套接或者插接并周向滑配于伸缩套管的末端；螺杆与螺纹座中心的螺纹通孔互配；伸缩套管的管壁上开有多个纵向分布的通孔，通孔内径大于插销的外径。采用上述方案后，伸缩套管及通孔和插销为其的一级伸缩，通过三者的配合，可粗调其高度；螺杆和螺纹座为其二级伸缩，二者配合，可精调其高度。因其高度可调，故适应各种地貌的要求；地基松软下沉时，只需转动螺纹座便可重新调整模板及其内砼的高度。广泛适用于不同地貌、地质条件下的各种砼的浇筑中。
Three The formwork support frame has appeared a kind of scalable and reusable all steel support structure like the steel formwork support combination structure. It consists of the expansion sleeve, screw, screw seat and bolt. The screw seat is sleeved or inserted and slidably arranged at the end of the expansion sleeve in a circumferential direction; the screw and the screw through-hole in the center of the screw seat are matched; there are multiple longitudinally distributed through-holes on the pipe wall of the expansion sleeve The inside diameter of the through hole is larger than the outside diameter of the pin. After the above scheme is adopted, the expansion sleeve, through hole and bolt are the primary expansion, and the height can be roughly adjusted by the cooperation of the three; the screw and screw seat are the secondary expansion, and the height can be precisely adjusted by the cooperation of the two. Due to its adjustable height, it can meet the requirements of various landforms; when the foundation is soft and sinking, the height of the formwork and its concrete can be readjusted only by turning the screw seat. It is widely used in the pouring of various kinds of concrete under different landforms and geological conditions.