MOUNTAIN TUNNEL RENEWAL METHOD AND LINING STRUCTURE

To conduct renewal work of a mountain tunnel while putting into use of an inside of the tunnel in common without using a substantial protector.SOLUTION: A mountain tunnel renewal method comprises: a first step of removing one shoulder while leaving a top end part and one side wall part and the other...

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Hauptverfasser: SAKAGUCHI MASANOBU, KUSAKA ATSUSHI, TATSUMI YOSHIKAZU, IWATA GORO, ITO SATORU, AKIYOSHI KENJI, ISAGO NOBUHARU, ISHIMURA TOSHIAKI, KOIDE TAKAAKI
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To conduct renewal work of a mountain tunnel while putting into use of an inside of the tunnel in common without using a substantial protector.SOLUTION: A mountain tunnel renewal method comprises: a first step of removing one shoulder while leaving a top end part and one side wall part and the other side wall part of existed lining coating an internal wall surface of a renewal planned range at a mountain tunnel, and constructing newly-founded lining of the one shoulder on the removal place; a second step of removing the other shoulder and constructing newly-founded lining of the other shoulder on the removal place; and a third step of constructing newly-founded lining of the top end part to an internal wall surface at the top end part of the existed lining and constructing a lining structure on the internal wall surface of the renewal planned range. The lining structure is constructed so that the newly-founded lining of the top end part, the newly-founded lining of the one shoulder and the newly-founded lining of the other shoulder, and the one side wall part and the other side wall part at the existed lining are integrated.SELECTED DRAWING: Figure 1 【課題】重厚なプロテクタを使用することなくトンネル内を供用しながら、山岳トンネルの更新工事を行うことである。【解決手段】山岳トンネルにおける更新予定範囲の内壁面を被覆する既設覆工のうち、天端部と一方の側壁部及び他方の側壁部とを残して、一方の肩部を撤去し、撤去跡に一方の肩部新設覆工を構築する第1の工程と、他方の肩部を撤去し、撤去跡に他方の肩部新設覆工を構築する第2の工程と、既設覆工の天端部における内壁面に天端部新設覆工を構築し、更新予定範囲の内壁面に覆工構造体を構築する第3の工程と、を備え、覆工構造体は、天端部新設覆工と、一方の肩部新設覆工及び他方の肩部新設覆工と、既設覆工における一方の側壁部及び他方の側壁部とが、一体となるように構築する。【選択図】図1