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“一个人吃上面另外两个舔下”-梳理天下新闻

昌九高铁首一个人吃上面另外两个舔下座大型连续梁完成跨铁转体

来源: 第一财经日报
2024-11-07 18:31:53

最佳回答

“一个人吃上面另外两个舔下”昌九高铁首一个人吃上面另外两个舔下座大型连续梁完成跨铁转体

  中新一个人吃上面另外两个舔下网九江11月7日电 (李翔一个人吃上面另外两个舔下 阙阳洋)11月7日,在新建京港高铁九江至南昌段(以下简称“昌九高铁”)庐山枢纽桥群建设现场,随着昌九高铁左线跨杭瑞高速特大桥跨既有铁路连续梁顺利落位,标志着全线首座跨铁转体大型连续梁成功完成转体,为后续大桥钢箱梁顶推施工打通关键通道。

  昌九高铁左线跨杭瑞高速特大桥位于江西省九江市柴桑区境内,全长3.4公里。此次转体施工的连续梁上跨既有京九铁路上、下行正线和武九西南下行联络线共3条繁忙既有铁路线,单个转体长98米、宽8.5米、重7383吨,是昌九高铁重点控制性工程。

图为昌九高铁首座大型连续梁跨铁转体施工现场。张学东 摄

  据中铁一局CJZQ-1标项目负责人赵少强介绍,此次连续梁转体施工面临距离营业线近、球铰安装精度要求高、高空作业安全风险大等诸多难题,给转体施工带来了较大困难。为了确保桥梁转体一次成功,建设与施工单位依托BIM和三维可视化交底技术,采用智能转体监测系统实时监控转体结构状态,动态跟踪转体速度、角度、高程、应力等关键技术指标,确保桥梁转体实现毫米级精准对接。

  昌九高铁庐山枢纽桥群,是指昌九高铁自庐山站引出后跨越或邻近营业线的6座桥梁,这些桥梁先后11跨营业线、2跨新建联络线,115个墩台邻近营业线,且多次立体交叉跨越或邻近联络线、京九铁路、武九客专等线路,线路多等级高,客货列车开行密集。施工单位在狭长夹心地带有限空间作业,物流运输条件苛刻,覆盖营业线范围大、工序转换频繁、施工组织极难、安全风险极高。赵少强说,通过700个日夜的不懈努力,建设者完成了Ⅲ级及以上封锁施工180次,实现营业线施工封锁开通“零延时”、安全“零事故”。

  昌九高铁正线全长138公里,设计时速350公里,桥隧比82%,共设车站5座,桥梁58座,隧道21座,是国家《中长期铁路网规划》“八纵八横”高铁主通道京港通道的重要组成部分。“当前,昌九高铁全线已进入架梁阶段,共架设箱梁772孔,贯通隧道17座,站房及四电工程全面开工建设,项目进度完成50%。大桥转体施工顺利完成后,全线架梁通道进一步贯通,预计2027年3月建成并具备开通运营条件。”昌九城际铁路公司昌九指挥部高级工程师钟达介绍道。

  昌九高铁建成通车后,将进一步促进江西对接融入粤港澳大湾区,助力实施长江经济带发展战略,对推动沿线经济社会高质量发展具有重要意义。(完)

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