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厉害了!1000公里的北京“大七环”今天合龙了(图)

2016-12-06 19:09:56   长安街知事

“密涿高速的建成,使得北京东南部现有的过境交通,尤其是货运过境交通,逐渐转移至北京外围地区,成为北京东南方向的交通大动脉。”密涿高速廊坊至北三县段管理处处长霍雷声告诉记者,这对于疏解首度交通压力、缓解汽车尾气对北京城区的污染具有重要意义。

更重要的是,密涿高速公路不仅是一条“枢纽路”,还是一条“机场路”。霍雷声介绍说,北京新机场建成后,这条高速将成为沟通新老机场的陆路干线,成为两座机场间最便捷的走廊。

道路虽然便捷,但建设过程中的难点也是“空前”的。据总工程师褚树起介绍,密涿高速修建至京哈铁路段时,施工单位采用了重达8600吨的转体桥“上跨”铁路,21米的高空作业创造了河北省内迄今最高的跨铁路转体桥纪录;而在与京沪高铁交汇时,在没有预留下穿空间的条件下,保证了路基全程不沉降,达到了高铁通过不减速的预期目标。

此外,该高速工程质量对标张承高速,确立了路面10年内不进行功能性维护,桥梁主体结构40年免维护,交通设施20年不落后的标准,在全省范围内位居前列。

首都大外环

一条公路项链绕出13新城

作为首都大外环的重要组成部分,密涿高速公路的通车,标志着北京在六环路以外又多了一条长达1000公里的环线。

首都大外环,在国家高速公路网正式的规划里叫做首都地区环线高速公路(G95),俗称大外环。

近年来,北京西北地区进京道路频繁出现拥堵现象。令人印象深刻的是,从2010年8月14日开始,京藏高速公路前往北京方向出现连续多日的大堵车,一百多公里的路段严重瘫痪,跨越京冀蒙三地。由于拥堵持续时间长,“京藏高速公路大堵车”引起了国内外多家媒体的广泛关注,社会影响很大。

据河北省交通厅相关负责人介绍,为缓解北京市过境交通压力,增加可选择的疏导绕行路线,改善首都空气环境质量,京冀两地政府共同提出建设首都大外环,并获得了国家发改委和交通运输部的支持。

根据国家高速公路网规划,首都大外环全长约942公里,其中河北境内约850公里,由12条段高速公路组成。其中,除承平高速公路目前正在开展前期工作外,其他路段已全部建成通车。

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