昨日凌晨,姑嫂树快速路最难工程姑嫂树跨铁路立交桥桩基完工,年底将进入桥梁“转体”施工。
中铁大桥局七公司介绍,姑嫂树跨铁路立交桥两边建筑物密集,车流人流拥挤,地下管网错综复杂,桩基施工距铁路线较近,施工难度很大。为了保证姑嫂树路车流、人流交通顺畅,在35米宽的作业面中间还留出两个各宽4米的车道。为了不影响交通、保证安全,钢筋笼安装和砼灌注都在夜间11时30分-凌晨5时路段封闭时间进行。
姑嫂树跨铁路桥是姑嫂树快速路的控制性工程,上跨京广、武合、汉孝等11股铁路。该桥总长256米,其中主跨116米,桥宽32米,为双向6车道。为减少对铁路的干扰,该桥将采用转体法施工,即桥梁先在顺铁路方向浇筑,浇筑完成后再通过转体装置,转体横跨铁路。转体将在离地面15米高的主墩墩顶处进行,是我国首例墩顶高空转体桥。整个工程预计年底完工。
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