A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
WIDENING STRUCTURE OF EXISTING PC FLOOR SLAB
PROBLEM TO BE SOLVED: To widen a floor slab by introducing prestress to a widened portion with additional concrete, such that to ensure continuation with an existing floor slab, and without hindering a service by an existing bridge.SOLUTION: Concrete of a floor slab 2a is chipped to expose a tensile material 3, at a location away from an anchored end of the tensile material 3 anchored near a widening side end, in an axial direction of the tensile material, but coming close within a range that enables introduced tensile force in the tensile material to be maintained. An intermediate anchorage device 10 is fitted on the tensile material, and re-filling concrete is cast for embedding the intermediate anchorage device and fixing integrally with the concrete floor slab. Then, concrete on the tensile material on the anchoring end on the widened side is chipped, and the existing anchorage device 5 is removed and a connecting tool 20 is fitted, for connecting an extension tensile material 4. Concrete is cast in the widened portion, and prestress is introduced by applying tension to the extension tensile material 4.SELECTED DRAWING: Figure 4
【課題】既存の橋梁の供用を阻害することを低減しつつ、新たにコンクリートを打ち足した拡幅部分に既存の床版から連続するようにプレストレスを導入して床版を拡幅する。【解決手段】緊張材３の、拡幅する側の側端付近で定着されている定着端から該緊張材の軸線方向に離れた位置であって、該緊張材の緊張力が導入された状態を維持できる範囲で接近した位置において該床版２ａのコンクリートをはつり、緊張材３を露出させる。この緊張材に中間定着具１０を装着し、埋戻し用コンクリートを打設し、中間定着具を埋め込んでコンクリートの床版と一体に固定する。その後、緊張材の拡幅する側の定着端のコンクリートをはつり、既存の定着具５を除去するとともに接続具２０を装着し、延長用緊張材４を接続する。拡幅する部分にはコンクリートを打設し、延長用緊張材４を緊張してプレストレスを導入する。【選択図】図４
WIDENING STRUCTURE OF EXISTING PC FLOOR SLAB
PROBLEM TO BE SOLVED: To widen a floor slab by introducing prestress to a widened portion with additional concrete, such that to ensure continuation with an existing floor slab, and without hindering a service by an existing bridge.SOLUTION: Concrete of a floor slab 2a is chipped to expose a tensile material 3, at a location away from an anchored end of the tensile material 3 anchored near a widening side end, in an axial direction of the tensile material, but coming close within a range that enables introduced tensile force in the tensile material to be maintained. An intermediate anchorage device 10 is fitted on the tensile material, and re-filling concrete is cast for embedding the intermediate anchorage device and fixing integrally with the concrete floor slab. Then, concrete on the tensile material on the anchoring end on the widened side is chipped, and the existing anchorage device 5 is removed and a connecting tool 20 is fitted, for connecting an extension tensile material 4. Concrete is cast in the widened portion, and prestress is introduced by applying tension to the extension tensile material 4.SELECTED DRAWING: Figure 4
【課題】既存の橋梁の供用を阻害することを低減しつつ、新たにコンクリートを打ち足した拡幅部分に既存の床版から連続するようにプレストレスを導入して床版を拡幅する。【解決手段】緊張材３の、拡幅する側の側端付近で定着されている定着端から該緊張材の軸線方向に離れた位置であって、該緊張材の緊張力が導入された状態を維持できる範囲で接近した位置において該床版２ａのコンクリートをはつり、緊張材３を露出させる。この緊張材に中間定着具１０を装着し、埋戻し用コンクリートを打設し、中間定着具を埋め込んでコンクリートの床版と一体に固定する。その後、緊張材の拡幅する側の定着端のコンクリートをはつり、既存の定着具５を除去するとともに接続具２０を装着し、延長用緊張材４を接続する。拡幅する部分にはコンクリートを打設し、延長用緊張材４を緊張してプレストレスを導入する。【選択図】図４
WIDENING STRUCTURE OF EXISTING PC FLOOR SLAB
既設ＰＣ床版の拡幅構造
KISHIDA MASAHIKO (author) / ISHIHARA YOSUKE (author) / YAMAUCHI TAKAHIRO (author) / MORITA AKIO (author) / FUJIWARA YASUHISA (author) / ANDO NAOFUMI (author) / ASAI HIROSHI (author) / SHINOZAKI HIROO (author)
2017-10-26
Patent
Electronic Resource
Japanese
IPC:
E01D
BRIDGES
,
Brücken
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