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発表 Characteristics of reinforcement for earthquake resistance in mountain tunnel

作成年度 2023 年度
論文名 Characteristics of reinforcement for earthquake resistance in mountain tunnel
論文名(和訳) 山岳トンネルにおける耐震補強の特性
論文副題
発表会 15th International ISRM Congress 2023
誌名
巻・号・回
発表年月日 2023/10/09 ~ 2023/10/14
所属研究室/機関名 著者名(英名)
東京都立大学河田皓介(KAWATA Kosuke)
東京都立大学福島実奈歩(FUKUSHIMA Minaho)
東京都立大学松岡輝(MATSUOKA Akira)
トンネルチーム日下 敦(KUSAKA Atsushi)
東京都立大学砂金伸治(ISAGO Nobuharu)
抄録
In Japan, some mountain tunnels are damaged by earthquakes and relative large-scale deformations such as the collapse of permanent lining and the deformation of supports have occurred. Though earthquake resistant countermeasures for tunnels has been examined recently, some countermeasures for existing tunnels are performed based on the result of tunnel inspection rather than the need against earthquake resistance. To clarify the effects and the mechanical behavior of countermeasures, the model experiment was conducted assuming actual road tunnels. The collapse mechanism was compared among the cases when various kinds of reinforcement to the tunnels were performed, such as rockbolts, fiber sheet, rebar. Results showed that the improvement of load-bearing capacity of the lining was limited, however the prevention of falling concrete blocks from structure could be expected.
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