| 摘要 |
PROBLEM TO BE SOLVED: To provide a tunnel excavating machine which can propulsively excavate the rockbed effectively even in the case hard rockbed and collapsible rockbed exist mixedly on the scheduled construction line for tunnel. SOLUTION: At excavating a hard sort rockbed, a chute 8 in a bucket shape is mounted in the transport starting part of a screw conveyor 9 arranged as confronting an excavated soil take-in chamber 7 formed between a cutter plate 2 and bulkhead 6 of the body 1 of excavating machine, and the rocks excavated by the cutter plate 2 are fed to the chute 8 and carried out by the conveyor 9. When the machine has encountered a collapsible rockbed, the chute 8 is removed, and muddy water is injected into the soil take-in chamber 7 to fill it, and excavation is executed by the cutter plate 2 while collapse of the working face is prevented with the pressure of muddy water, and the soil from excavation is carried out backward by the conveyor 9. |
