| 摘要 |
The present invention relates to an excavating bit having an air hammer and a screw for excavating ground composed of earth, sand, soft rock, and boulder and, more specifically, to an excavating bit which is connected to the bottom end of a lowermost excavating rod among multiple excavating rods connected and assembled to a ground excavation device in multiple stage. According to the present invention, the excavating bit can reduce construction time and costs required for excavating the soft rock ground. |
