高度跨度世界第一 花江峡谷大桥荷载试验启动|国产午夜亚洲精品午夜鲁丝片
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中新社贵阳8月21日电 (记者 张伟 瞿宏伦)21日,随着18辆总载重630吨的卡车分批行驶上桥,将以“3*6”的排列方式,停放在主跨1/4处预先划定的停靠点。世界第一高桥——花江峡谷大桥荷载试验正式启动。
花江峡谷大桥是贵州六(六枝)安(安龙)高速公路的关键控制性工程,位于贵州省安顺市关岭布依族苗族自治县与黔西南布依族苗族自治州贞丰县交界处,横跨北盘江花江段峡谷。大桥全长2890米,于2022年1月开工建设,桥面距水面625米,高度居世界第一,主桥跨径1420米居山区桥梁跨径世界第一。
荷载试验是桥梁通车前验证大桥结构安全性与承载能力的关键环节,也被称为大桥的“全身体检”。花江峡谷大桥荷载试验分为空载试验、静力荷载试验和动力荷载试验三个阶段,整个过程将持续4天。
现场共安排15种试验工况,布置400多个传感器,检测桥梁主塔、主梁、主缆在静力荷载作用下的变形和应力情况。

本次静载试验所需车辆共3个量级,分别为18辆、48辆、96辆依次递增,最大载重将超过3300吨,后续试验将于22日至23日陆续开展。静载试验结束后,24日将进行大桥动力荷载试验,测试桥梁结构自振特性参数和动力响应值,分析桥梁的动力特性及动力响应情况。
通车后,大桥两岸通行时间从2小时缩短至2分钟,六枝特区至安龙县行车时间将由原来的3小时缩短为1.5小时,对助力贵州省经济发展,加快资源互通,促进地方经济具有重要意义。(完)
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