The world's largest diameter double-decked tunnel successfully passing through the slender West Lake | slender West Lake | | tunnel _ the world's largest news and information

Xinhuanet, Nanjing, December 11 (reporter Deng Huaning)-10th, the world's largest diameter single-tube highway tunnel with double--slender West Lake in Yangzhou smoothly through the tunnel. Tunnel beneath known as "the gardens, and the Empire," the reputation of the slender West Lake scenic spot in core sectors, length 3. 6 km, designed as a single-tube double-bi-directional four-lane.

It is reported that the tunnel is the single largest investment in the history of urban construction project in Yangzhou. Among them, the main tunnel section 1. 2 kilometers, the design speed of 60 km/h, using single-tube two-tier system, lower level features two lanes with a diameter of 14. 5 meters with a total investment of more than 2 billion dollars, and projected construction period of 32 months. On December 28, 2012, "the slender West Lake," large tunnel boring machine starts well. 10th, "the slender West Lake," tunnel boring machine will drill the last part, reach the Lake West to accept wells, slender West Lake shield all through.

Construction company China railway 14 Bureau group head of slender West Lake tunnel project introduction, tunnel shield machine in the main section 14. 93 meters in construction of big diameter slurry shield machine in the world, going up to more than 1200 meters of full-hard plastic clay stratum. This tunnel to conquer the worldwide such as hard plastic clay stratum full face shield construction challenges, technology has reached the international advanced level.

According to reports, attaches great importance to environmental protection during the construction of the tunnel. Start at the beginning, separation of slurry shield machine equipment for upgrading to enable separation of mud and muck, to ensure not only that the slender West Lake water quality from pollution, could also be obsoleted by mud and water recycling. At the same time, uplift and subsidence of ground surface at 10 mm and 30 mm design within allowed limits, the effective protection of the nation's 5 grade a scenic natural landscape and cultural heritage.

Opening of the slender West Lake tunnel is expected to completed in September next year, when from East to West of the Lake as long as 3 minutes, greatly alleviate scenic transport as well.

December 11, 2013 The website
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世界最大直径双层隧道成功穿越瘦西湖|瘦西湖|隧道|世界最大_新闻资讯

　　新华网南京12月11日电（记者 邓华宁）10日，世界最大直径单管双层公路隧道——扬州瘦西湖隧道顺利贯通。隧道下穿素有“园林之盛，甲于天下”美誉的瘦西湖风景区核心区段，全长3．6公里，设计为单管双层双向四车道。

　　据悉，该隧道是扬州城建史上单项投资最大的工程。其中，主体隧道段长1．2公里，设计速度为60公里／小时，采用单管双层方案，上下层各布置两条车道，直径为14．5米，项目总投资为20多亿元，预计建设工期32个月。2012年12月28日，“瘦西湖号”大型盾构机开始下井作业。10日，“瘦西湖号”盾构机将钻完最后一环，到达湖西接受井，瘦西湖隧道盾构段全部贯通。

　　施工单位中国铁建十四局集团瘦西湖隧道项目负责人介绍，隧道主体盾构段采用14．93米的世界超大直径泥水平衡盾构机施工，要穿越长达1200多米的全断面硬塑粘土地层。这一隧道攻克了全断面硬塑粘土地层等世界性盾构施工难题，多项技术达到国际领先水平。

　　据介绍，隧道施工过程中十分注重环境保护。开工之初，对盾构机泥水分离设备进行改造升级，使泥浆和渣土分离，不仅确保瘦西湖水质不受污染，还将本可废弃的泥土和水资源循环利用。同时，将地表隆起和沉降的幅度控制在10毫米和30毫米的设计允许范围之内，有效保护了国家5Ａ级风景名胜区的自然景观和文化古迹。

　　瘦西湖隧道预计明年9月建成通车，届时从湖东到湖西只要3分钟时间，大大缓解景区交通压力。

2013年12月11日11:28
新华网
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