| 摘要 |
PURPOSE:To perform high-efficient, safe, and high-precise propulsion of a shield machine along the design curve of a tunnel. CONSTITUTION:The rear port of a shield jack 2 on the inner side of a curve is switched and connected to an oil return line with a pressure control valve, and a piston rod 16 is coupled and fixed to an assembled segment 4 through a jig 17. With this state, a shield machine 1 is pushed by means of a shield jack 3 on the outer side of a curve. In this way, the shield jack originally in an inoperative state during construction of the curve part of a tunnel is effectively utilized to achieve a purpose. |
