著者
梅本 利男 鈴木 英雄 河村 巧 岡田 正之 鷹田 雅宏
出版者
Japan Society of Civil Engineers
雑誌
トンネル工学研究発表会論文・報告集 (ISSN:18849091)
巻号頁・発行日
vol.3, pp.119-124, 1993-11-19 (Released:2011-06-27)

The areas around the Kamisunagawa tunnel were dotted with many cavities from of old coal mines. Furthermore, as this tunnel was planned to pass Gm beneath a very decrepit existing tunnel, there was a fear that the two would interfere with each other.The main results obtained through this construction method are as follows.(a) Under complex ground conditions, as in the case of this tunnel, “urethane-injected rock-bolts” are an effective reinforcing measure, as they do not require special equipment.(b) When excavating the new tunnel beneath the existing one, a distorted settlement phenomenon occurred in the existing tunnel, due to weak strata. When weak strata exist, natural ground reinforcement is required in wide areas.

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外部データベース (DOI)

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〉粉炭状の石炭が詰まっている状態で、木片、レールも確認されたことから、採炭跡と https://t.co/O7hT0UYQ3b ブランチマイニング中に廃坑掘り当てたマイクラ感ある
(”☆ ☆)この上砂川トンネル、炭鉱跡の掘削&旧道のトンネルの影響がどうなるかわからないというのもあって、かなり調査が慎重に行われたトンネルですね (☆ ☆”)https://t.co/0emXmuFDZ0 https://t.co/QB0CK1d0a7

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