| 摘要 |
<p>A shield tunnelling machine having incorporated therein an earth removing apparatus which comprises a tubular casing 7 having an earth inlet 7a at one end and a closable earth outlet 7b at the other end, and an earth transport conveyor 8 rotatably provided within the casing 7 and comprising a helically twisted strip. Unlike conventional earth removing apparatus for such a machine, which apparatus has a screw conveyor comprising a rotary shaft and a screw blade around the shaft, the present apparatus can transport and discharge earth containing large solid fragments and therefore performs the desired function even when small in diameter, i.e. in shield diameter. <IMAGE></p> |
