顶进框构桥既有线加固计算分析  

Computation and Analysis on Existing Line Reinforcement of Jacking Frame Bridge

作　　者：刘洪亮 魏庆 李克银 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津市300251

出　　处：《城市道桥与防洪》2015年第4期42-43,9,共2页Urban Roads Bridges & Flood Control

摘　　要：针对顶进框构桥既有线加固措施,以某顶进框构桥为例,运用Midas civil软件对加固体系进行计算分析,建立了该框构桥加固体系纵横梁计算模型,计算横梁的强度及挠度。通过对模型的计算分析,得知加固体系中横梁的跨度不宜太大,铁路股道的具体位置对横梁的受力影响较大,在满足铁路相关要求的情况下,纵梁应尽量靠近铁路以减小横梁跨度。Aiming at the existing line reinforcement measures of jacking frame bridge, and taking a jacking frame bridge as an example, the software of Midas civil is applied to compute and analyze the reinforced system. The vertical and horizontal girder computation model of the reinforced system of this frame bridge is established to compute the strength and deflection of horizontal girder. The computation and analysis of model show that the span of horizontal girder in the reinforced system is not too longer. The detail position of railway track has the greater influence on the stress of horizontal girder. Under the condition of satisfying the relative requirement of railway, the vertical girder should be as closed as to the railway so as to decrease the span of horizontal girder.

关 键 词：顶进框构桥 加固 横梁 强度 挠度 计算分析 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]