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社评“1819岁macbookpro高清”-环球时报

世界最大直径水1819岁macbookpro高清下盾构隧道掘进破千米 月进尺426米创世界纪录

来源: 山东商报
2024-12-22 23:13:06

最佳回答

“1819岁macbookpro高清”世界最大直径水1819岁macbookpro高清下盾构隧道掘进破千米 月进尺426米创世界纪录

  中新1819岁macbookpro高清网济南12月20日电(记者 沙1819岁macbookpro高清见龙)20日,在山东济南黄河北岸地下30米处,随着“山河号”盾构机500环管片拼装完成,由中铁十四局参建的济南市黄岗路穿黄隧道掘进突破1000米,标志着世界最大直径水下盾构隧道取得阶段性进展。

  上述隧道工程全长5755米,设计时速60公里。其中盾构段长约3290米,管片外径16.8米,单管双层双向6车道,由开挖直径17.5米的世界在建最大直径泥水平衡盾构机“山河号”负责施工。

10月20日,在山东济南黄岗路穿黄隧道建设现场,工人正在安装管片。(资料图) 赵荣发 摄

  自今年9月1日“山河号”始发后,中铁十四局集团先后攻克钙质结核密布、生态环境敏感、废浆处理需求大等难题,以每日16米至18米的速度向前推进,并实现最高月进尺426米,创造了17米级盾构施工世界新纪录。

  据中铁十四局项目盾构经理薛永超介绍,“山河号”盾构机开挖面积达240平方米,每日产生废浆超1万立方米。项目团队首创废浆“提浓+压滤”系统组合工艺,通过对废浆的提浓、压滤,最终实现固液分离。团队还对废浆分离出来的尾水开展无害化及梯级资源化利用关键技术研究,将尾水再用于调制盾构泥水循环浆液,实现盾构尾水的零排放、再利用,做到绿色、环保施工。

10月20日,在山东济南市的黄岗路穿黄隧道建设现场,隧道施工正持续推进。图为部分成型后的隧道内部。(资料图) 赵荣发 摄

  中铁十四局项目工程师周祥告诉记者,在掘进过程中,地层中出现大量钙质结核,强度最高可达41兆帕,堪比高层建筑承重构件所使用混凝土的强度。为有效防止钙质结核卡泵现象,项目团队采取安装鄂式破碎机、增大泥浆管路直径的方式,同时研发了双管路液压采石装置,使用液压控制、远程操作切换,一用一备,实现盾构高效掘进。

  济南市黄岗路穿黄隧道工程是该市构建南北向跨黄河的大通道之一,是中国掌握世界最高水平超大直径隧道建设技术的标志性工程。隧道的建设将助力济南主城区与新旧动能转换起步区互联互通,助力黄河流域生态保护和高质量发展。(完)

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