目前,国内在灌注桩和地下连续墙等深基础的施工中所采用的钻头,以几何形状可分为笼式钻头、三角钻头、鱼尾钻头、螺旋钻头等;以钻翼数量多少又可分为二翼钻头、三翼钻头、四翼钻头等。设计究竟采用什么方法,选取什么钻头才可获得最佳钻进速度,并使运行安全可靠呢?我们在施工实践中,采用了常规设计和可靠性设计相结合的方法,取得了较好的效果。本文就上述问题提供一些看法。 At present, the drill bits used in the construction of deep foundations such as cast-in-place piles and diaphragm walls can be classified into cage drill bits, triangular drill bits, fish tail drill bits, and spiral drill bits in geometric shapes; the number of drill wings can be divided into It is a two-blade drill, a three-blade drill, a four-blade drill, etc. What method is used in design and what bit is selected to obtain the best drilling speed, and to make the operation safe and reliable? In the construction practice, a combination of conventional design and reliability design has been adopted and good results have been achieved. . This article provides some views on the above issues.