长深高速河惠段改扩建项目上演桥梁“缝合术”|强壮公妇公侵hd中字
1. 强壮公么是什么意思
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3. 强壮功功法图解
中新网广州11月5日电 (记者 蔡敏婕)同一路段上,左右两幅独立飞跨的大桥,如何才能“缝合”成一体?
广东交通集团5日发布消息,长深高速河惠段改扩建项目新丰江大桥、东江大桥4日完成施工建设,具备八车道通行条件。

新丰江大桥和东江大桥是项目控制性工程,长度分别约为291米(主跨130米连续刚构)和799.7米(主跨80米连续箱梁),均由四车道扩建至八车道。桥梁大跨径拼接技术在这两项工程得以成功应用,实现了旧桥部分整体横向拼接,攻克了大跨径混凝土连续箱梁在旧桥改扩建中的核心难题。
其中,新丰江大桥旧桥拼接工程成为内地大跨径连续刚构桥横向拼接的先例,为同类工程升级改造提供了新路径。
在施工过程中,项目新丰江大桥与东江大桥采用单侧加宽的方式进行改扩建。建成后,旧桥将从双向四车道转换为单向四车道行驶,而该部分原左右两幅路面之间设置了承载护栏的翼缘板,存在30至40厘米的间隙。
按照传统方案,旧桥完成焕新升级后,护栏仍会保留或更新处理。为实现旧桥整体“合成”,确保行车更加畅通舒适,项目创新提出了“大跨径桥梁拼接”方案,通过3D模型验证与随机车流模拟优化工艺,运用超高性能混凝土,对旧桥实施“刚性缝合”。
这场大型“合体手术”怎么做?施工前,建设团队运用水射流切割法精准“开刀”,凿除翼缘板混凝土,完整展现原有钢筋结构,为旧桥拼合创造有利条件。随后植入加密钢筋,实现桥梁初步“牵手”,形成受力连接的关键部位。
在搭建好的钢筋“骨架”里,项目选用超高性能混凝土进行浇筑。这种材料抗压强度高达130MPa,是普通混凝土的4-5倍,能让桥梁更加稳固耐用。
为确保工程质量,项目构建了智能化质量控制体系,通过微观CT扫描与性能测试,确保材料均匀可靠;运用结构雷达探测技术精确定位旧桥预钢束及锚头,避免施工损伤;同时,智能监测系统动态跟踪浇筑位移差与温度变化,全方位保障拼接工程优质耐久。
项目形成了一套系统化、可复制的核心技术体系,为全国大跨径旧桥的合理利用与整体化拼接提供了可推广的行业范本,目前已发表SCI论文3篇,公开发明专利3项。
作为广东省“十四五”规划重点工程,项目全长约116.6公里,起于河源市东源县,终于惠州市惠阳区,采用双向八车道高速公路标准改扩建。截至目前,项目路基工程完成100%,路面工程完成98%,预计今年底全面建成通车。(完)
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