矿业建筑设备基础多带有预留孔,孔宽一般为100～500毫米,深200～500毫米,施工中如稍有不慎,就会造成设备无法就位安装。孔洞预留多用木盒。但这种做法弊病很多,不仅浪费木材和工时,拆除不便,不宜固定,而且成型也不规整。针对这种情况,可采用预制混凝土盒代替木盒。具体做法如下。1.用木材或薄钢板制作模具。内模用钢板焊接固定,外模用合页固定,可折叠展开。内模尺寸为预留孔洞实际尺寸,混凝土 The foundation of mining construction equipment has many reserved holes. The hole width is generally 100-500mm and the depth is 200-500mm. If there is any carelessness during construction, the equipment can not be installed in place. Holes are reserved for wooden boxes. However, this approach has a lot of drawbacks. It not only wastes wood and working hours, it is inconvenient to remove, it should not be fixed, and molding is not regular. For this situation, precast concrete boxes can be used instead of wooden boxes. The specific approach is as follows. 1. Make a mold from wood or steel sheet. The inner mold is welded and fixed with a steel plate, and the outer mold is fixed with a hinge and can be folded and unfolded. The inner mold size is the actual size of the reserved hole, concrete