| 摘要 |
FIELD: bridge building. ^ SUBSTANCE: bridge span structure includes roadway section, longitudinal girders connected to it, end and above-pier transversal diaphragms, channel forming means, prestressed reinforcing rod bundles arranged in channel forming means and having active, passive and dead anchors. Each longitudinal girder has U-shaped cross-section and consists of two longitudinal ribs connected one to another by panel in top parts thereof. Each longitudinal girder is provided with bosses located on inner panel and rib sides. Bosses disposed on inner panel sides are embedded in longitudinal ribs by sides thereof. Prestressed reinforcement consists of lower bundles, upper bundles, transit linear bindles and polygonal bundles. Lower bundles are located in groups in longitudinal ribs of U-shaped longitudinal girders in all spans of span structure. Passive and/or active anchors thereof are supported by bosses located on inner sides of longitudinal ribs. Upper bundles are arranged in groups in near-pier panel parts of U-shaped girders and passive and/or active anchors thereof are secured to bosses located on inner sides of panel. Transit linear bundles extend through the whole span structure and have dead and/or active anchors supported by end transversal diaphragms. Polygonal bundles are located in lower area of longitudinal robs and pass into upper panel area and extend in reverse direction. Polygonal bundles terminate in central parts of adjoining spans. Active anchors of polygonal bundles are supported by end transversal diaphragms. Dead anchors are built in concrete body of longitudinal U-shaped girders. ^ EFFECT: possibility to create span structure with efficient cross-section having prestressed reinforcement arranged in accordance with momentum curve, reduced concrete consumption and decreased number of reinforcement rods. ^ 2 cl, 15 dwg |
