| 摘要 |
<p>PROBLEM TO BE SOLVED: To alleviate complication in a shield frame due to a seal mechanism of a seal chamber.SOLUTION: Seal means for sealing a gap between a segment assembly and a shield frame 11 by filling a seal chamber 41 with filler includes a main pipeline which extends from a pump feeding the filler toward the seal chamber 41 with pressure, a frame body part pipeline 44 which is provided in a ring girder 34 and connected to the main pipeline, a plurality of frame body part side branch part pipelines 45a which are provided branching from the frame body part pipeline 44 and extend toward the inner wall of the shield frame 11, a plurality of seal chamber side branch part pipelines 45b which are connected to the frame body part side branch part pipelines 45a, are provided with an interval in a circumferential direction on the outer peripheral surface of the shield frame 11, and communicate with the seal chamber 41, and hydraulic cylinders 46 which are installed between the frame body part side branch part pipelines 45a and the seal chamber side branch part pipelines 45b.</p> |
