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中新网哈尔滨7月22日电 (记者 姜辉)日前,哈尔滨都市圈环线西南环段松花江特大桥主桥钢箱梁顶推施工完成高精度合龙。这一关键节点的告捷,极大地加快了项目整体推进速度,为桥梁后续缆索体系施工、桥面施工奠定了坚实基础,同时也标志着中国严寒地区自锚式双塔悬索桥建设技术取得新突破。

哈尔滨都市圈环线西南环段项目由黑龙江省交通运输厅组织实施,哈尔滨都市圈西南环线投资有限公司投资建设,其节点性控制工程——松花江特大桥由黑龙江省建设投资集团所属龙建路桥股份有限公司承建。该桥是中国寒地跨径最大的自锚式悬索桥,桥梁全长6.8公里,主桥跨度550米,采用混凝土+钢箱混合梁结构,钢箱梁由61个节段组成,总长550米、总重达1.17万吨,以正交异性板流线型扁平结构设计,能够有效减少风阻,显著提升桥梁结构强度,为桥梁长期安全运营提供保障。

为实现“毫米级”精准合龙,项目团队部署了基于数字孪生技术的智能监控体系,应用智能应力变形监控及智能全站机器人实时监测顶推进度与偏移量,将应力、姿态数据实时传回“云端大脑”,全面把控顶推施工的力学状态及变形风险;智慧工地系统环境感知模块实时监测温度变化,捕捉高温环境下钢结构的微妙应变,有效应对高温导致钢箱梁材料热胀冷缩效应;便携式弧焊协作机器人凭借灵活精准的焊接能力,确保了焊接作业的安全性与质量稳定性,智能三维千斤顶调整系统有效解决了大型构件装配的定位难题,实现X/Y/Z方向±1mm的毫米级精度控制。
此次钢箱梁高精度合龙不仅刷新了中国严寒地区桥梁建设精度纪录,更通过智能建造技术的深度融合,为复杂环境下的超大型桥梁工程提供了可复制的“龙江方案”。(完)
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