Experimental Evaluation of Test Construction of Base Reinforcement Applied for RC Rigid Frame Viaducts for Large-Scale Renovation of Tokaido Shinkansen Infrastructure
東海道新幹線大規模改修に向けたRCラーメン高架橋の基礎補強試験施工の評価
The reinforced concrete rigid-frame viaducts of the Tokai Shinkansen experience significant vertical pile motion during train passage in some places and the presence of minor cracks in upper longitudinal beam haunches has been confirmed. While impact vibration and other tests have not detected problems in the base bearing capacity of these viaducts, the carbonation of concrete is progressing, raising concern as a potential cause of rebar corrosion. Against this backdrop, focusing on the vertical spring of the base of viaducts, the authors investigated a base reinforcement method for viaducts to improve the vertical spring of the base through the effective use of the vertical spring of the existing base, and carried out test construction and effect verification measurements. The authors confirmed improvement in the vertical spring of the base and reduction of vertical pile motion through viaduct base reinforcement, and developed specifications for viaduct base reinforcement.東海道新幹線のRCラーメン高架橋は，一部には列車走行に伴う柱鉛直動が大きい箇所があり，上層縦梁ハンチ部には軽微なひび割れが確認される箇所がある。これら高架橋の基礎支持力は衝撃振動試験等の結果より問題ないがコンクリートの中性化が進行し，鉄筋腐食の要因となり得ることが懸念される。そこで，根本原因と考えられる高架橋の基礎鉛直ばねに着目し，解析・設計により既設の基礎鉛直ばねを有効に活用した基礎鉛直ばね向上工法として高架橋基礎補強工法を検討し，試験施工および効果確認測定を実施した。これにより高架橋基礎補強による基礎鉛直ばねの向上および高架橋柱鉛直動の低減を確認し，高架橋基礎補強の仕様を策定した。
- Record URL:
- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03871061
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Authors:
- Takeguchi, C
- Imai, K
- Doi, A
- Azuma, M
- Publication Date: 2013
Language
- English
- Japanese
Media Info
- Media Type: Web
- Features: References;
- Pagination: pp 635-640
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Serial:
- Concrete Journal
- Volume: 51
- Issue Number: 8
- Publisher: Japan Concrete Institute
- ISSN: 0387-1061
- EISSN: 2186-2753
- Serial URL: https://www.jstage.jst.go.jp/browse/coj
Subject/Index Terms
- TRT Terms: Corrosion; Frames; Railroad bridges; Reinforced concrete; Reinforcing bars; Rigid structures; Viaducts; Vibration
- Geographic Terms: Tokai Region (Japan)
- Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Railroads; I61: Equipment and Maintenance Methods;
Filing Info
- Accession Number: 01542330
- Record Type: Publication
- Source Agency: Japan Science and Technology Agency (JST)
- Files: TRIS, JSTAGE
- Created Date: Oct 29 2014 11:26AM