| 摘要 |
PURPOSE:To simply remove an obstacle such as a foundation pile existing at the front when a tunnel is excavated. CONSTITUTION:Natural ground probing radars 7a-7d, a core boring machine 10, and a filler injection device 8 are arranged in front of a shield machine 1, and an obstacle M in the front natural ground is detected by the natural ground probing radars 7a-7d. The obstacle M is cut and removed by a core boring machine 10, a filler is injected into a formed cavity C by a filler injection device 8, and the front natural ground is further excavated by the shield machine 1. |
