地脚螺栓的施工一般采用予埋法,其螺栓消耗在固定架上的钢料很多(如柳州钢厂650轧机消耗钢达48吨),花费劳动达30%,还需20%的劳动用于矫正锚固螺栓。尽管在安装中采取措施,仍难保证螺栓安装精度。特别是旧基础改造,过去都是炸掉重建,浪费更大。为此,我们改用打予埋孔,用环氧砂浆锚固光面直杆地脚螺栓新工艺,制出一台硬质合金薄壁钻机(见图1)。 The construction of anchor bolts generally adopts the method of pre-embedding. There are many steel materials that are consumed by bolts on the fixed frame (such as Liuzhou Steel’s 650 mill consumes up to 48 tons of steel). The labor cost is up to 30%, and 20% of labor is required. Correct the anchor bolts. Although measures are taken during installation, it is still difficult to ensure the accuracy of bolt installation. In particular, the old infrastructure was rebuilt and destroyed in the past. It was even more wasteful. For this purpose, we used a new process of tapping the buried hole and anchoring the smooth rod anchor bolts with epoxy mortar to make a hard alloy thin-wall drilling rig (see Figure 1).