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首页> 外文会议>International Symposium on Earth Reinforcement Nov 14-16, 2001, Fukuoka/Kyushu/Japan >Ultra-high hybrid wire and concrete-faced Mechanically Stabilized Earth bridge abutments
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Ultra-high hybrid wire and concrete-faced Mechanically Stabilized Earth bridge abutments

机译：超高混合丝和混凝土面机械稳定土桥基台

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摘要

Hybrid Reinforced Earth~(~R) abutments support a two-span highway bridge crossing a mine haul road in Arizona, USA. Concrete abutments were physically impractical and economically impossible at this 24m height, while a four-span bridge would have required massive, expensive earthmoving. Bridge loads are supported by spread footings bearing on the Reinforced Earth backfill. The superstructure's adjacent 1.4m deep precast box girders have an asphalt wearing surface, making the bridge easy to disassemble when the highway is relocated after the 10 year life of the mine. These unique abutments have a hybrid facing of Reinforced Earth precast concrete panels and TerraTrel~(~R) galvanized wire mesh facing, all connected to galvanized steel strip reinforcements. Exposed to impact, the lower 9m has 180mm thick precast facing. The upper 15m, with TerraTrel wire facing, directly supports the abutment footings. This hybrid Reinforced Earth design using TerraTrel solved an otherwise economically unsolvable problem.
机译：混合增强土基（〜R）基台支撑了横跨美国亚利桑那州矿山运输道路的两跨公路桥梁。在这个24m的高度上，混凝土基台在物理上是不切实际的，并且在经济上是不可能的，而四跨桥则需要大量昂贵的土方工程。桥梁载荷由加固土方回填上的分布基础支撑。上部结构的临近的1.4m深预制箱形梁具有沥青易磨损的表面，使该桥在矿山使用10年后搬迁时易于拆卸。这些独特的基台具有钢筋混凝土预制混凝土面板和TerraTrel〜（〜R）镀锌铁丝网面的混合面，所有面都与镀锌钢板增强件相连。受到冲击，下部9m具有180mm厚的预制饰面。上部15m带有TerraTrel线，直接支撑基台基础。这种使用TerraTrel的混合加固地球设计解决了原本在经济上无法解决的问题。

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