在高层建筑和地下工程的地基加固而进行的土层锚杆施工中，采取圆锥形冲击回转挤密钻头与气动潜孔锤结合，形成了冲击回转挤密成孔的钻进方法。通过在回填土、淤泥质亚粘土、亚粘土和粘土地层中采用该方法获得不同钻进速度的比较，对影响钻进速度的因素、圆锥形冲击回转挤密钻头在钻进过程中同钻头前方土层的相互作用及土层性质变化进行分析，指出圆锥形冲击回转挤密钻头的缺点及适用条件，并提出对该钻头结构的改进方案 In the high-rise buildings and underground works of the ground reinforcement of soil anchor construction, the use of conical impact rotary bit with the combination of pneumatic hammer to form a rotary hammer impact drilling method. Through the method of backfill, muddy loam, loam and clay formation obtained by this method to compare the different drilling speed, the factors that affect the drilling speed, cone impact rotary compacting bit during drilling with the front of the drill The interaction between soil layers and the change of soil properties are analyzed. The disadvantages and applicable conditions of the conical impact rotary compacting bit are pointed out, and the improvement scheme of the bit structure is proposed