SHIELD EXCAVATOR TAIL SEAL REPLACEMENT METHOD AND WATER SEALING PLATE
To provide a method to replace a tail seal of a shield excavator, which enables a tunnel with a small bending radius to be constructed.SOLUTION: A tail seal 61, which is disposed on a rear part of a skin plate 10 of an excavator body and seals between an outer peripheral surface of the skin plate 10...
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Main Authors | , , |
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Format | Patent |
Language | English Japanese |
Published |
16.10.2023
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Subjects | |
Online Access | Get full text |
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Summary: | To provide a method to replace a tail seal of a shield excavator, which enables a tunnel with a small bending radius to be constructed.SOLUTION: A tail seal 61, which is disposed on a rear part of a skin plate 10 of an excavator body and seals between an outer peripheral surface of the skin plate 10 and an inner peripheral surface of an existing segment, is replaced during construction of the tunnel. Pieces constituting a segment ring 31 located in the inside of the tail seal 61 to be replaced are fixed to a spreader of a rod of a shield jack and moved forward by contracting the rod. Exposed surfaces in an axial direction of the pieces exposed by the movement and a gap between an outer peripheral surface of the segment ring 31 and an inner peripheral surface of a rear skin plate, and a gap between an exposed surface in circumferential direction of the piece and the outer peripheral surface of the segment ring 31 are covered by a water sealing plate 70 and the tail seal 61 is replaced through a space generated by the movement.SELECTED DRAWING: Figure 5
【課題】小さな曲げ半径のトンネルを構築することが可能なシールド掘削機のテールシールの交換方法を提供する。【解決手段】トンネルを構築する途中において、掘削機本体のスキンプレート10の後部に設けられ、スキンプレート10の外周面と既設のセグメントの内周面との間を封止するテールシール61を交換する。交換すべきテールシール61の内方に位置するセグメントリング31を構成するピースを推進ジャッキのロッドのスプレッダーと固定し、このロッドを収縮することにより前方に移動し、この移動により露出したピースの軸方向の露出面、及び、セグメントリング31の外周面と後スキンプレートの内周面との間、並びに、ピースの周方向の露出面とセグメントリング31の外周面との間を止水板70により覆い、移動により生じた空間を介してテールシール61を交換する。【選択図】図5 |
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Bibliography: | Application Number: JP20220059391 |