| 摘要 |
<p>Telescopic tunnel boring machine including a front shield (10) and a rear shield (16) with a cutting head (14) at the forward end of the front shield. Rearwardly extending shutters can be moved out hydraulically by auxillary cylinders (54) from the rear end of the rear shield to bridge the gap (34) between this rear end and tunnel lining elements 32. Additionally expandable cuffs (70) and (72) may be provided on the front and rear shields respectively behind the cutting head (14) and radial tunnel wall grippers (20).</p> |
