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为了满足钻孔桩施工的需要,我厂研制出了BDM-2型大直径钻孔机。本机适应用于岩石强度1000公斤/厘米~2左右的岩层上及一般表土层上进行钻孔作业,最大钻孔直径为1.5米,钻孔深度为40～100米。通过在新荷线长东黄河大桥及湖北枝城码头基础施工,证明本机使用效果良好,现将本机的构造及使用情况简介如下。本钻孔机由钻架、卷扬机、转盘及转盘变速箱、水龙头、吊具、钻具、操纵室、电气系统、泵吸排渣系统、钻杆夹持装置、钻杆起吊回转装置等部件组成,其外形如图1所示。
In order to meet the needs of bored pile construction, our factory has developed a BDM-2 large-diameter drilling machine. This machine is suitable for drilling operations on rock formations with a rock strength of around 1000 kg/cm~2 and on the general surface soil. The maximum drilling diameter is 1.5 meters and the drilling depth is 40 to 100 meters. Through the construction of the foundations of the Xinhe Line Changdong Yellow River Bridge and the Zhicheng Wharf in Hubei Province, it has been proved that the machine has a good use effect, and the structure and use of the aircraft are now described as follows. The drilling machine is composed of a drill frame, a hoisting machine, a turntable and a turntable gearbox, a faucet, a spreader, a drilling tool, a control room, an electrical system, a pumping and slagging system, a drill pipe holding device, a drill pipe lifting rotating device and the like. Its appearance is shown in Figure 1.