Experimental Evaluation of Test Construction of Base Reinforcement Applied for RC Rigid Frame Viaducts for Large-Scale Renovation of Tokaido Shinkansen Infrastructure

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  • 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
  • トウカイドウ シンカンセン ダイキボ カイシュウ ニ ムケタ RC ラーメン コウカケハシ ノ キソ ホキョウ シケン セコウ ノ ヒョウカ

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Abstract

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.

Journal

  • Concrete Journal

    Concrete Journal 51 (8), 635-640, 2013

    Japan Concrete Institute

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