人行斜拉桥换索工程施工控制

Construction Control of Cable Replacement of Pedestrian Cable-stayed Bridge

对人行斜拉桥换索施工控制过程进行分析,讨论在换索过程中不同施工参数在不同施工阶段下的特点,并借助有限元法进行理论索力值与实测索力值的对比分析。结果表明:换索后,实测索力与理论索力之间的误差均在规范要求的2%范围内,主梁线形得到较大改善,主塔偏位正常,换索施工过程满足设计要求。

The cable replacement construction control of pedestrian cable-stayed bridge is analyzed. The characteristics of the different construction parameters under the different construction stages in the process of cable replacement are discussed. The theoretical value of cable force is analyzed and compared with the measured value of cable force in virtue of the finite element method. The result shows that after the cable replacement, the error between the measured cable force and the theoretical cable force is all within 2% of the code requirements. The alignment of the main girder is greatly improved, the deviation of the main pylon is normal and the cable replacement process meets the design requirements.