| 摘要 |
PURPOSE:To improve curved propagation excavation performance by continuously connecting a rear drum with a shield jack into the rear of a front drum with a cutter head while a broken-type jack combining expansion and contraction and an expansion type antirotation device are coupled continuously between the front drum and the rear drum. CONSTITUTION:A rear drum 16, a front section 16a of which is fitted and which is bent and expanded and contracted and has a shield jack 14, is connected continuously into the rear section 15a of a front drum 15, to a front section of which a rotated and driven cutter head 12 is set up, while a plurality of broken-type jacks 17 combining expansion and contraction and expansion type antirotation devices 18a, 18b are combined continuously between the front drum 15 and the rear drum 16, thus forming a shield excavator. Expansion and contraction, bending, rectilinear propagation and curved propagation in all directions are executed freely. Accordingly, shield excavation and segment assembly can be executed simultaneously, thus improving shielding excavation performance and efficiency. |
