近年来,钢筋混凝土构件得到了广泛的应用。但是,往往由于施工考虑不够周密,经常出现应该预留的上下水、采暖、煤气和电照等孔洞未能预留,有时即使预留了孔洞,也常会因施工不慎而出现误差或偏移等现象,这就给施工安装带来了很多困难,按照以往惯例,就只好用人工凿岩扩孔,这不仅浪费大量的人力和物力;而且劳动强度大,工作效率低,更为严重的是人工凿岩扩孔时,由于冲 In recent years, reinforced concrete components have been widely used. However, due to inadequate construction considerations, holes, such as water, heating, gas, and electric lighting that should be reserved, are often not reserved. Sometimes, even if holes are reserved, errors or offsets may occur due to inadvertent construction. Such phenomena have brought a lot of difficulties to construction and installation. In accordance with past practice, they had to use artificial rock drilling to ream holes. This not only wastes a lot of manpower and material resources, but also has great labor intensity, low work efficiency, and even more serious. Artificial rock drilling, due to red hole