トンネル用先受け鋼管及び先受け工法

Japanese Patent JP7175200

B2

To provide a forepiling steel pipe and a forepiling method for a tunnel capable of improving working efficiency by reducing labor of inserting the forepiling steel pipe by receiving the natural ground in a forward excavating direction of the tunnel.SOLUTION: A forepiling steel pipe 10 comprises two or three pipe bodies 11 connected in a row. A length of each of the pipe bodies 11 is equal to 5 m or more in the case of the two ones, and 3.5 m or more in the case of the three ones. Each of the pipe bodies 11 is composed of steel material, tensile strength of which is 650 N/mm2 to 1500 N/mm2, and yield strength of which is 600 N/mm2 to 1150 N/mm2.SELECTED DRAWING: Figure 1

WO/2013/133546	METHOD FOR CONSTRUCTING UNDERGROUND TUNNEL
WO/2017/159605	LARGE CROSS-SECTION UNDERGROUND SPACE CONSTRUCTING METHOD AND OUTER SHELL SHIELD STARTING BASE

Hirayama Hiroyasu

JP2019002142A

November 18, 2022

January 09, 2019

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Fujimori Sangyo Co., Ltd.

E21D9/04

JP2002013383A
JP2017002722A
JP2020045637A
JP2006176993A
JP2012144964A
JP2015143556A
JP2014062385A
JP2014015723A
JP3851550B2
JP2016121441A

薄肉化した高強度鋼管を用いた新AGF工法を開発しました[online],株式会社大林組(他2名),2018年11月27日,URL:https://www.obayashi.co.jp/news/detail/news20181127_1.html
フジモリ産業株式会社 トンネル補助工法用 AGF 鋼管「AGF-Air-pipe」を開発 補助工法用の鋼管重量を半減し作業性を劇的に向上[online],フジモリ産業株式会社,2018年11月22日,URL:https://www.fujimori.co.jp/cms/files/documents/site/jp/news/23/20181122Airpipe%E9%96%8B%E7%99%BA.pdf

Watanabe Noboru
Harada Thirty Yoshi

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