江阴靖江长江隧道主体结构完工|无码人妻一区二区三区四区免费看
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中新网南京11月29日电 (汪俐辰)11月29日,由中交一公局集团隧道局承建的江阴靖江长江隧道“江底对接段”正式完工,标志着隧道主体结构全部完成。项目团队成功破解了高水压、强渗透地层盾构“江底对接”的世界级难题。

当日,江阴靖江长江隧道江底对接技术总结与成果交流会暨隧道智能掘进技术研究院成立大会在南京举行。
作为国务院规划的长江经济带综合立体交通走廊重点项目,江阴靖江长江隧道盾构段全长4937米,开挖直径16.09米,最大承受水压0.82兆帕,是当时国内在建直径最大、承受水压最高的公路盾构隧道。
其中,江底对接段水压达0.76兆帕,相当于每平方米盾壳承受约76000公斤压力,且地处高水压、强渗透软土地层,技术难度远超现有施工范畴,国内外尚无实施标准和可借鉴工程案例。
项目团队通过构建精密控制网,实时捕捉盾构机位置,研发相向掘进可视化系统监控施工,精准调整推进参数,最终实现水平偏差0毫米、垂直偏差2毫米的高精度对接。同时创新非对称异步冻结方案,经363次高精度钻孔取芯保障冻结效果,解除全部重大风险。
江阴靖江长江隧道建成后,将有效缓解江阴长江大桥交通压力,增强长江干线过江通道通行能力,为长江经济带发展及长三角高质量一体化注入新动能。(完)
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