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中国建世界第二高桥 高406米长2171米(图)
2016-01-11 16:30:10 中国青年报
艾磊记忆深刻的是,由于缆索吊跨度超千米,如何保证重达180吨板珩结合梁在406米的高空中水平运输的速度,是摆在团队面前的一个大难题。艾磊和同事们仔细分析难点,发现施工规模和系统有效性是影响速度的关键因素,于是通过实验室里一次又一次实验,摸索出一套全新的方法。
在桥面的中央分隔带加设导流板,其作用如同飞机机翼,将风对桥的影响减到最少;将大桥的伸缩缝缩减到两个,相对于同等跨度200米一个伸缩缝的悬索桥来说,增强行车舒适度;在特殊地形环境下,采用人工牵拉的先导索,节约成本数十万元,节约工期一个月……来自这个8090后技术团队的创新实践,解开了这道406米深、2171米长的难题,也为今后山区大跨径悬索桥的建设提供了宝贵的经验。
目前,该项目催生了《山区千米级板桁结合加劲梁悬索桥建养关键技术研究与示范》《山区大跨径板桁结合钢桁梁悬索桥建设及管养技术研究》《大跨径缆索吊成套技术研究》等9个科研项目,预计有20余篇论文、10余个专利、1个工法即将完成。
在2015年9月26日进行的大桥合龙仪式上,最后一块板桁结合体缓缓从地面提升到空中,张明闪慢慢走到大桥另一端,离开了等待欢呼的人群。
有人问张明闪:“是因为害怕出现万一吗?”
“如果这都合不上,那我们是干啥吃的?”张明闪微微一笑。
责任编辑:陈倩 CN030
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