世界最宽双边工字钢组合梁斜拉桥完成荷载试验|99国产精品久久久久久久久久久
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中新网宜昌11月1日电 (李魏)世界最宽双边工字钢组合梁斜拉桥——宜来高速柴埠溪特大桥10月31日完成荷载试验,这也是湖北省首座高速公路与省道同层共建的斜拉桥。

宜来高速公路宜昌段是湖北省高速公路网规划“七纵五横三环”中“五横”的重要组成部分,柴埠溪特大桥是全线重点控制性工程。该桥位于宜昌市五峰土家族自治县,主桥长904米,主跨480米,桥面宽44.5米,采用“双向四车道高速公路+双向两车道二级公路”标准建设,由湖北交投集团投资、宜昌建设公司组织建设、中交二航局承建。
荷载试验是桥梁通车前的“终极体检”,通过模拟各种行车状态,检验桥梁结构的安全性能和承载能力。柴埠溪特大桥荷载试验以“全面覆盖、精准采集、严苛标准”为原则,构建了成桥状态测试、静载试验、动载试验三大测试体系。
在静载试验中,19个测试工况层层递进,35吨级三轴载重车组成的重载车队轮番上阵,单次最大投入49台车辆形成1715吨的极限荷载。为捕捉核心数据,技术团队在桥梁关键部位密集布设190余个应变测点、50余个位移测点及40余个索力测点,对主梁挠度、应变分布、桥塔偏位、斜拉索索力等关键指标进行实时监测与精准分析。

在动载试验中,设置15个工况,依次完成脉动测试、无障碍行车、有障碍行车及制动试验,获取了桥梁在动态荷载作用下多项关键响应数据。为规避昼夜温差对测试精度的影响,所有试验均在夜间气温稳定时段开展,技术人员三班轮岗、全程值守,保障数据的准确性。
作为湖北省南部东西向的交通大动脉,宜来高速公路的建成,将有利于完善湖北省域整个武陵山区高速公路路网格局,对振兴湖北旅游业、扶持革命老区发展、加强武陵山民族地区经济协作、促进民族团结具有十分重要的意义。(完)
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