灰色GM（1,1）模型在大跨连续刚构桥梁线形控制中的应用

大跨连续刚构桥线形控制质量关键取决于悬臂施工过程中各节段的预拱度取值。基于灰色GM（1,1）模型理论,将大跨连续刚构桥各节段预拱度值的理论计算值和现场实测值之间的差值作为灰色微分序列,建立新陈代谢GM（1,1）模型。结合镇大公路京杭运河大桥主桥施工监控项目工程实际,依据灰色模型对大桥施工过程中各节段的预拱度进行预测,从而控制桥梁线形。监控实践表明,灰色GM（1,1）模型能够较精确地预测施工过程中各节段的预拱度,很好地应用于大跨连续刚构桥梁的线形控制中。

Application of grey GM(1,1) model in linear control of long span continuous rigid-frame bridge

The key technique of linear control quality of long span continuous rigid-frame bridge depends on camber values on each segment of bridge during cantilever construction process.Based on grey GM(1,1) model theory,take the camber difference between theoretical value and field test values on each segment of long span continuous rigid-frame bridge as the grey differential sequence,and established the metabolic grey GM(1,1) model.Combined with construction monitoring project practice of main bridge of Jinghang C...