公路桥梁索塔钢锚箱焊接形变控制  

Research on welding deformation control of steel bridge anchor box of highway bridge pylon

作　　者：龙浩 LONG Hao(China Railway 18th Bureau Group Fifth Engineering Co.,Ltd.,Tianjin 300459,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300459

出　　处：《焊接技术》2020年第7期81-85,I0012,共6页Welding Technology

摘　　要：由于在形变控制中忽视了焊接控制点的作用,导致钢锚箱不能适应不同焊接载荷的作用力,形变部位较多,形变控制精度不理想,为此设计公路桥梁索塔钢锚箱焊接形变控制方法。在水平拉力作用下,计算拉力作用点的形变参数以及抗拉刚度,计入摩擦力作用,并计算焊接时的折减系数,将索塔索力水平分为等效且直接作用于钢锚箱侧板上的水平力,计算焊接过程的受力参数。根据计算结果采用三维坐标测量方法,设置公路桥梁索塔钢锚箱焊接控制点,确定控制点之间的相对关系,进行误差分析,以此完成公路桥梁索塔钢锚箱焊接形变控制。试验对比结果表明,此设计的形变控制方法能够适应不同焊接荷载作用力,降低了钢锚箱焊接形变的风险,且焊接精度能够满足实际要求。Due to the neglect of the role of welding control point in deformation control,the steel anchor box cannot adapt to the forces of different welding loads,there are many deformation parts,and the deformation control accuracy is not ideal.Therefore,the welding deformation control method of steel anchor box for highway bridge pylon was designed.Under the action of horizontal tension,the deformation parameters and tensile stiffness of the tension point were calculated,the friction effect was included,and the reduction coefficient during welding was calculated.The cable tower force level was divided into the equivalent horizontal force which directly acted on the side plate of the steel anchor box,and the stress parameters during the welding process were calculated.According to the calculation results,three-dimensional coordinate measurement method was used to set up the welding control point of the steel anchor box of the cable tower of the highway bridge,determine the relative relationship between the control point,and the error analysis was carried out,so as to complete the welding deformation control of the steel anchor box of the cable tower of the highway bridge.The experimental results showed that the deformation control method could adapt to different welding loads,reduce the risk of welding deformation,and the welding accuracy could meet the actual requirements.

关 键 词：索塔 钢锚箱 焊接 形变 受力 控制点 三维坐标 

分 类 号：TG404[金属学及工艺—焊接] TH833[机械工程—仪器科学与技术]