基于BIM技术的高低位组合钢栈桥应用研究——以巴河大桥为例

Study on the Application of High and Low Position Composite Steel Trestle Based on BIM Technology:Taking the Ba River Bridge as an Example

在特大桥的建设中,栈桥作为重要的水上通道得到广泛应用,栈桥设计也是桥梁工程顺利实施的重要环节。以巴河大桥5#墩基础、墩柱施工为工程背景,针对桥址区巴河水位变化较大的特点,为确保次年汛期前的主墩施工进度,采用高低位组合钢栈桥方案,并利用“BIM(建筑信息模型)+数字仿真分析”技术进行模拟与结构分析。通过GIS(地理信息系统)获取各阶段洪水位高度,以此确定栈桥搭设高度,随后利用MIDAS软件对高低位组合钢栈桥结构各部件进行验算。结果表明,高低位组合钢栈桥结构设计合理,整体稳定性及安全性满足使用要求。高低位组合钢栈桥的成功应用,可为同类型工程的施工提供一定参考和借鉴。

In the construction of super large bridges,trestle has been widely used as an important water passage,so the safe and reliable design of trestle is an important link for the smooth implementation of bridge projects.Taking the construction of the foundation and pier columns of Pier 5 of the Bar River Bridge as the engineering background,in response to the significant changes in the water level of the Ba River in the bridge site area,in order to ensure the construction progress of the main pier before the next flood season,a combination of high and low steel trestle bridge scheme was adopted,and utilized the“BIM(building information modeling)+digital simulation analysis”technology for simulation and structural analysis,the flood level heights of each stage were obtained through GIS(geographic information system)to determine the height of the trestle erection.Subsequently,MIDAS software was used to verify the various components of the high and low level composite steel trestle structure.The results indicate that the design of the high and low level composite steel trestle structure is reasonable,and the overall stability and safety meet the requirements of use.The successful application of high and low level composite steel trestle bridges provides certain reference and reference for the construction of similar projects.