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川藏铁路拉林段第一座跨雅鲁藏布江大桥铺轨

2018-11-26 20:31:02    新华网

新华社拉萨11月26日电(普布扎西 俞文喜)26日上午,在贡嘎雅鲁藏布江特大桥上,第一组长25米的轨排精准落下。这标志着川藏铁路拉林段第一座跨江大桥——贡嘎雅鲁藏布江特大桥开始铺轨架梁,拉林铁路顺利迈出了跨越雅江的第一步。

贡嘎雅鲁藏布江特大桥位于西藏自治区山南市贡嘎县境内,全长5727米,横跨雅鲁藏布江,是拉林铁路最长的桥梁。其主桥上部结构由50孔32米简支T梁和81孔48米节段拼装箱梁构成。

“作业地位于藏南谷地,江面宽、风力猛,江边风沙一旦扬起,与大桥成垂直角度,面临严峻的风沙气候考验。为此,我们积极同气象部门沟通,采用先进的测风设备,科学判断安全铺架时间。”担负铺架任务的中铁十一局三公司铺架二队队长聂勇军介绍。

据了解,川藏铁路拉林段全长435公里,其中桥隧总长约301公里,从拉萨河流域穿过分水岭后,沿着雅鲁藏布江河谷地质缝合带一路向东,南临喜马拉雅山脉,北靠冈底斯山脉和念青唐古拉山脉,16次横跨雅鲁藏布江。

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