| 摘要 |
PURPOSE:To prevent generation of the leakage of water in tunnel lining work by providing a water stopping plate in a shield excavator, formed by providing an outer shell, press ring and a mold supporting member, and injecting concrete to be deposited in deposition space. CONSTITUTION:A mold supporting member 11, movable for an outer shell 2, is moved to its front, and a water stopping plate 5B is set up between the mold supporting member 11 and a part of tunnel lining work space 20. Next injecting concrete to be deposited in primary concrete depositing space 31, a press ring 7, movably provided inside the outer shell 2, is moved to its front. Space 32, generated by moving the press ring 7, is charged with a filling member 21C injected, and a shield excavator 1 is advanced digging. Further protruding the press ring 7 to the rear, the space is charged with the filling member 21C pressurized. In this way, the leakage of water in the tunnel lining work part 20 is prevented further enabling execution to be performed of high reliability. |
