基于灰色系统理论的高速铁路桥梁施工控制  

High-speed Railway Bridge Construction Control Based on Grey System Theory

作　　者：白浩 冯志勇 BAI Hao;FENG Zhi-yong(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《兰州工业学院学报》2021年第5期9-14,共6页Journal of Lanzhou Institute of Technology

摘　　要：为使高速铁路桥梁的成桥线形和应力满足设计要求,应用灰色系统理论建立GM(1,1)模型,结合新建铁路赣州至深圳客运专线潼湖特大桥374#~377#墩连续梁桥进行实践分析.该桥主梁施工预拱度由预测模型调整,确定下一阶段最优立模标高;同时预测控制截面的应力变化规律,并将实测应力值、理论应力值以及预测应力值三者相互校核、相互验证.结果表明:采用基于灰色系统理论方法优化预拱度的立模标高后,梁体线形的实际走向与理论走向一致,全桥以高精度实现合龙;同时控制截面应力预测值与实测和理论值的发展变化趋势相同,起到了超前预报的效果.In order to make the shape and stress of the high-speed railway bridge meet the design requirements,the gray system theory is applied to establish the GM(1,1)model,which is combined with the continuous beam bridge of Tonghu Bridge 374#~377#on the newly-built Ganzhou-Shenzhen Passenger Dedicated Line.The construction pre-camber of the main girder of the bridge is optimized and adjusted to determine the elevation of the beam section.At the same time the stress change law of the control section is predicted,and the measured stress value,the theoretical stress value and the predicted stress value are checked and verified each other.Practical results show that after optimizing the elevation of the pre-camber based on the gray system theory method,the actual orientation of the beam shape is consistent with the theoretical orientation,and finally the whole bridge is closed with high precision.At the same time,the predicted value of the section stress is controlled with the measured and theoretical values.The development and change trend of the stress value is the same,which has the effect of advanced forecasting.

关 键 词：铁路桥梁 施工控制 灰色系统理论 预拱度 立模标高 线形与应力 

分 类 号：U238[交通运输工程—道路与铁道工程]