当前位置:首页>南京>险过“咽喉”!沪宁合高铁南京特大桥跨京沪铁路转体梁,成功转体!

险过“咽喉”!沪宁合高铁南京特大桥跨京沪铁路转体梁,成功转体!

  • 2026-02-25 00:19:14
险过“咽喉”!沪宁合高铁南京特大桥跨京沪铁路转体梁,成功转体!

谁能想到?相当于8500辆家用轿车重量的1.7万吨转体梁,在日均通行超400列的京沪高铁上空,仅用数小时就完成26.3度精准转身,轴线偏差控制在毫米级,全程未影响一趟高铁通行!

提起跨高铁桥梁施工,业内都清楚这是“刀尖上跳舞”——既要攻克大吨位梁体转体的技术难题,又要确保下方繁忙干线的绝对安全,任何微小失误都可能引发连锁反应。沪宁合高铁作为国家“八纵八横”高速铁路网沿江通道的重要组成部分,是连接上海、南京、合肥三大都市圈的关键纽带,而跨京沪高铁特大桥的转体施工,正是全线最核心的控制性工程,其难度在华东地区同类项目中首屈一指。这座特大桥全长约17.6公里,先后跨越京沪高铁、天潜高速等多条交通干线,其中2×100米预应力混凝土单T构梁是转体核心,全长201.5米、宽12.6米,采用悬臂浇筑施工,先平行于京沪高铁预制,再通过转体实现跨越,与运营线路呈26.3度小交角,这种设计让施工精度要求达到了苛刻级别。

1.7万吨的梁体如何实现“转得动、转得稳、转得准”?项目团队给出的答案是技术创新与精细化管理的双重保障。转体的核心“秘密武器”是球铰精准定位牵引系统,相当于在梁体底座安装了一个巨型“磨盘”,通过260吨的牵引力拉动梁体旋转,转体完成后再将“磨盘”锁死并浇筑混凝土,使其与梁体融为一体。为解决大吨位转体的平衡难题,团队创新运用动态平衡配重法,通过精准计算和实时调整,确保梁体在旋转过程中始终保持稳定。

施工中采用的智能监测系统更是功不可没,实时监控转体姿态、受力变化、风速等关键指标,技术人员通过数据终端全程把控,一旦出现微小偏差立即动态调整,最终实现轴线偏差毫米级的精准就位。同时,项目严格执行邻近营业线施工规范,实施安全穿透式管理和“网格化责任矩阵”,转体前对配重、滑道、牵引系统等十大类关键项目逐项核查签字,转体日期结合气象预报科学选定,最终在无雨雾、风力小于4级的有利环境下实施,全程未对京沪高铁运营造成任何影响。

这场“空中芭蕾”的背后,是沪宁合高铁建设中一系列技术突破的缩影。事实上,除了跨京沪高铁的1.7万吨转体梁,项目沿线还攻克了多个同类难题:南京特大桥总重6300吨的转体梁,通过2台200吨千斤顶对称牵引,在60分钟内逆时针旋转60度跨越京沪铁路;六合特大桥1.13万吨的连续梁,在70分钟内顺时针转动46度,成功跨越南京地铁S8号线,创下江苏省首次采用连续梁转体技术跨越既有地铁的纪录。这些转体施工均采用“先预制、后转体”的工艺,利用夜间地铁或铁路停运的“天窗时间”作业,最大限度减少对既有交通的干扰。

梁体施工中,0#块采用盘扣支架现浇,其余梁段运用挂篮悬臂法浇筑,主墩采用双肢圆端形薄壁实体墩,基础则通过直径1.8米、桩长36米的钻孔灌注桩牢牢固定,从设计到施工的每个环节都体现着严谨与精准。这些技术创新不仅攻克了大跨度、大吨位、小交角条件下的施工瓶颈,更形成了一系列可复制、可推广的经验,为今后同类跨繁忙交通干线的工程提供了重要参考。

沪宁合高铁的建设意义,远不止一条交通干线那么简单,它是长三角一体化发展的“钢铁纽带”,串联起上海的金融资本、南京的科教资源、合肥的科创成果。线路全长约311公里,设计时速350公里,建成后将在三大都市圈间形成1小时交通圈,合肥至上海的时空距离将压缩至1.5小时以内。作为沪渝蓉高铁的东段线路,它将填补江苏长江北岸高铁空白,优化沿长江地区铁路网布局,承担沿江通道主要路网客流和部分直通上海的客流运输任务。

沿线的苏州工业园区、滁州智能制造产业园等产业载体,已依托高铁规划布局“站城一体化”示范区,吸引总投资超500亿元的项目集聚;马鞍山、全椒等节点城市,也将通过高铁融入长三角核心圈层,带动农产品销售半径扩大和农民收入增长。而跨京沪高铁转体梁的成功,不仅打通了沪宁合高铁建设的关键节点,更让这条钢铁动脉的贯通又近了一步,为区域间人才、技术、资本的自由流动奠定了坚实基础。

有人可能会疑问,如此大投入的桥梁转体施工,为何不选择传统架梁方式?其实,在繁忙的交通干线上空架梁,传统工艺不仅施工周期长,更可能对既有线路运营造成长期干扰,安全风险极高。而转体施工通过预制与转体分离的模式,既保证了工程质量和施工安全,又最大限度减少了对交通运营的影响,看似复杂的工艺,实则是效率与安全的最优解。1.7万吨转体梁的成功,正是这种科学选择的最好证明——它用毫米级的精准,实现了重大工程建设与繁忙交通运营的和谐共生。

现在的沪宁合高铁建设现场,一个个关键节点不断被攻克,一条连接长三角未来的钢铁动脉正在加速成型。这座1.7万吨的转体梁,不仅是工程技术的里程碑,更是区域协同发展的见证。

那么问题来了,你觉得沪宁合高铁通车后,最先受益的会是沿线的产业发展、旅游出行还是城乡融合?

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  1. CONNECT:[ UseTime:0.000629s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001002s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000313s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000262s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000556s ]
  6. SELECT * FROM `set` [ RunTime:0.000248s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000663s ]
  8. SELECT * FROM `article` WHERE `id` = 463869 LIMIT 1 [ RunTime:0.000436s ]
  9. UPDATE `article` SET `lasttime` = 1772321961 WHERE `id` = 463869 [ RunTime:0.004547s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000234s ]
  11. SELECT * FROM `article` WHERE `id` < 463869 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000608s ]
  12. SELECT * FROM `article` WHERE `id` > 463869 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000477s ]
  13. SELECT * FROM `article` WHERE `id` < 463869 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000853s ]
  14. SELECT * FROM `article` WHERE `id` < 463869 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001153s ]
  15. SELECT * FROM `article` WHERE `id` < 463869 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002083s ]
0.084008s