内蒙古快三形态走势图

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大型摊铺机

济青高速“四改八”破解“反开挖快速回填”难题 文·摄影/王宇 中大机械 昨天

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济青高速“四改八”破解“反开挖快速回填”难题 文·摄影/王宇 中大机械 昨天


文章转自:交通建设与管理公众号

文·摄影/王宇 



1适应经济发展,济青高速“四改八”




提到中国的高速公路建设,山东一直名列前茅,最具代表性的当属1993年底建成通车的济南至青岛高速公路(济青高速),这是我国三条,也是山东省第一条高速公路。济青高速经国家批准利用世行第三批公路贷款,全长318公里,横贯山东半岛,打通了沿海与内地省区的通道,把华东、华北、中原地区甚至沿黄流域、西北内陆与沿海大港——山东青岛港联系起来,使众多内陆省区有了比较畅通的出海口。


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2确保四车道通行,水稳处理反开挖回填



为此,参建人员首先在济青高速一侧采取硬拼接的方式尽快修建一条两车道的新路,然后封闭另一侧的两车道老路,让建好的两车道新路与两车道老路形成四车道保证通行。根据改扩建工程要求,对封闭后的老路基与新修道路进行层层搭接处理,通过各种有效的路基处理手段避免新旧路基因不同沉降而造成断裂病害。在沥青面层铺设阶段,引进陕西中大机械 Power DT2000超大型抗离析摊铺机,对全线单幅18.75米超大宽度的路面一次摊铺成型,打造了我国第一条真正意义的“横向一字坡”改扩建高速公路路面。


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3联合课题攻关,成套装备实现连铺连压



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《交通建设与管理》杂志记者在项目二标现场看到,一台横向物料转运车+一台大厚度摊铺机内蒙古快三形态走势图+一台39吨单钢轮智能振动压路机+一台37吨胶轮压路机,在料车的配合下,快速地完成一层水稳层的摊铺碾压,在不远处又是同样的台设备配合作业,完成第二层水稳层的摊铺碾压。


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4历经20年积淀,确保大厚度抗离析工法实现



刘铭介绍说,济青高速反开挖部位主要在第三行车道上,这也是大型车辆行驶的车道,因此对道路质量要求很高,尤其是路基承载能力必须强。


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