大跨度重载荷钢结构桁架施工质量缺陷纠偏技术  

Rectification technology for quality defects in the construction of large-span,heavily loaded steel trusses

作　　者：张炜 王明 张化全 ZHANG Wei;WANG Ming;ZHANG Huaquan(Hefei Design and Research Institute of Coal Industry Co.,Ltd.,Hefei 230001,China)

机构地区：[1]煤炭工业合肥设计研究院有限责任公司,安徽合肥230001

出　　处：《煤炭工程》2025年第2期38-43,共6页Coal Engineering

摘　　要：东周窑煤矿清洁能源改造项目乏风平台的大跨度钢结构桁架在施工过程中由于施工工序及施工管理失误等诸多原因,导致大跨度钢结构桁架产生竖向变形位移及钢结构框架支撑柱产生水平方向变形位移的严重质量缺陷,直接影响设备安装、安全使用。针对上述问题,采用后张法折线形预应力高强度钢索配合两侧外侧对称设置钢丝缆绳对大跨度钢结构桁架反向加载,同时辅助大型吊车在大跨度钢结构桁架中间点施加垂直向上拉力使桁架垂直变形及支撑框架柱水平变形回归纠偏技术。该纠偏技术不仅成功消除了结构质量缺陷,而且纠偏效率高、成本低,同时不改变桁架及支撑框架柱原设计整体安全,实现安全高效纠偏技术效果,具有较高的应用推广价值。The large-span steel truss of Dongzhouyao Coal Mine clean energy transformation project has serious quality defects such as vertical deformation and displacement of large-span steel truss and horizontal deformation and displacement of steel frame support columns,due to the construction process and construction management errors,which directly affects the equipment installation and safe use.Aiming at the problem,we introduced the reverse loading of large-span steel trusses by post-tensioning folded prestressing high-strength steel cables with the symmetrical setting of steel wire cables on both sides,and at the same time,assisting a large crane to apply vertical upward tension in the middle of large-span steel trusses so that the vertical deformation of the trusses and horizontal deformation of the support columns can be returned to the deviation correction technology.This rectification technology not only eliminated the structural quality defects,but also showed high efficiency,low cost,without influencing the overall safety of the original design of the joist and the supporting frame columns,which is of high value of application and popularization.

关 键 词：钢结构桁架 钢框结构支撑柱 质量缺陷 纠偏技术 

分 类 号：TD22[矿业工程—矿井建设] TU312[建筑科学—结构工程]