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又一項世界之最!它能將300輛小轎車起吊至130層樓高度 – 有海水的地方就有中國人

又一項世界之最!它能將300輛小轎車起吊至130層樓高度

又一項世界之最!它能將300輛小轎車起吊至130層樓高度
2,403

又一项世界之最!它能将300辆小轿车起吊至130层楼高度

来源:科技日报 作者:俞慧友

可将300辆小轿车一次性起吊至130层楼高度?超大型塔式起重机核心技术攻关,又获重大成果。10月25日,中联重科自主研制,历经十年技术积累和迭代,拥有上百项发明专利,最大起重量450吨、额定起重力矩12000吨米的全球首台万吨米级上回转塔机W12000-450,在湖南常德下线。这不仅刷新了中联重科2010年自主研发的5200吨米塔机D5200-240时的自创世界纪录,也成功问鼎现下全球最大吨位上回转塔机纪录。

W12000-450塔机,是中联重科为建设世界最大跨度公铁两用斜拉桥——常泰长江大桥量身定制的塔机。常泰长江大桥为特大型桥梁,建设荷载超大、跨径超长,主跨达1176米。根据施工设计,需超大型塔机将400吨预制混凝土件吊装至近400米高度。塔机进驻项目后,将主要用于该项目5号墩主塔中塔柱和上塔柱吊装施工,助力其解决桥面安装吊载大、就位精度要求高、高空吊装难度大、江面施工风速强等一系列桥梁施工难题。同时,它的应用也有助项目大幅缩短施工周期,节约施工成本。

“W12000-450塔机的参数,比D5200塔机参数成倍数增长。但它绝非D5200的简单‘放大版’。从塔机型式上,它实现了完全的颠覆,采用了平头式主塔加动臂式辅塔架构。在超大钢结构设计制作、超重载传动、超重作业智能安全等方面,也实现了多达百余项原创技术突破。塔机设计、制造,到下线,一气呵成。”塔机项目技术负责人喻乐康说。

据了解,塔机主要自主攻克了分体式平头单臂架技术、杆系单销榫头特大标准节技术、“八金刚”平滑大变小顶升过渡技术、大功率超高塔机的供配电技术、多面多缸同步顶升及顶升安全控制技术、重载多倍率超大容绳量起升卷扬系统技术和厚板T型接头全融透焊接技术等多项技术。以焊接为例。使用了近4000吨钢材的“巨无霸”塔机,单件最大尺寸14米%uD76米%uD76米,单件最大重量66吨,焊缝总长达5.8公里。体型大、焊接难、精度高,中联重科通过全球最大塔机智能工厂,采用数字化焊机搭载T型接头全熔透焊接技术,攻克了超厚板焊接开裂的技术难题。

与会专家认为,这是全球塔机技术发展的里程碑事件,意味着中国桥梁及铁路施工装备迈入世界前列,有望助力大型建筑施工工法提升。

另据悉,在完成常泰长江大桥施工后,W12000-450塔机还将助建世界最大跨度三塔斜拉桥——安徽巢马长江大桥。

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