摘要
为了对下穿高铁桥梁新建工程安全施工及高铁桥梁安全运营提供保障,本文基于数值仿真技术,对工程实施期间的风险源进行定性分析;构建施工模型,对桥梁基本构造、变形、桩基承载力等进行仿真计算,定量评估工程施工的安全风险,并在施工过程中,采用自动化监测系统对高铁桥梁桥墩竖向变形进行实时动态监测,据此结果调整优化模型参数;利用调整后的模型对高铁桥梁变形趋势进行预测;根据预测结果采取措施及时调整施工工艺,从而实现下穿高铁桥梁变形动态控制,保障施工安全。实践证明,基于数值仿真和实测反演的下穿高铁桥梁施工变形控制方法取得了可靠的结果,降低了下穿工程施工对高铁桥梁变形的影响,为确保高铁安全运营提供了有力的技术支撑。
In order to provide technical guarantee for the safe construction and operation of the underpass bridge in high-speed railway based on numerical simulation technology,the risk exchange method and expert investigation method were used to conduct qualitative analysis of the risk sources,and then a construction model was constructed to simulate the basic structure,deformation and displacement of the bridge and the bearing capacity of pile foundation,etc.,so as to evaluate the construction risks quantitatively.At the same time,the automatic monitoring system was used to conduct real-time dynamic monitoring of the vertical deformation of the pier of the bridge during the construction process.Based on the measured data,the model parameters were constantly adjusted and optimized,and the modified model was used to predict the deformation trend of the bridge,so as to know the potential dangers early,and timely adjust the construction technology to realize dynamic deformation control of the underpass bridge in high-speed railway and ensure the construction safety.The deformation control method and measured inversion proposed in this paper has achieved relatively reliable application effects in the project,reducing the influence of underpass construction on the deformation of high-speed railwaybridge,and provide great support for safety operation of high-speed railway.
作者
张泽
ZHANG Ze(China Railway Construction Bridge Engineering Bureau Group Co.,Ltd.,Tianjin 300300,China)
出处
《测绘技术装备》
2025年第2期49-53,共5页
Geomatics Technology and Equipment
基金
中国铁建大桥工程局集团有限公司科技创新项目(DQJ-2024-A01)。
关键词
下穿高铁桥梁
数值仿真
实测反演
模型修正
underpass bridge in high-speed railway
numerical simulation
measurement inversion
model modification
