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鉴于铁路与堤坝交叉段施工期安全性分析是铁路和堤坝设计、施工的重要环节,采用有限元分析方法开展温州市铁路S1线跨堤桥梁段和温州灵昆南堤坝交叉段施工期变形、内力计算及安全性分析。结果表明,采用先堤后桥方案,施工完成时桥梁桩基的最大沉降、堤坝的最大水平向位移均满足要求,同时桥梁对堤防整体应力的影响远小于堤坝自重对自身的影响。此外,为减少堤坝施工对桥墩内力的影响并降低堤坝最终沉降量,应对堤坝结构地基(与桥墩交叉部位)采用扩大水泥搅拌桩处理范围、减小桩间距等加固措施。
In view of the safety analysis during the construction period of railway and embankment crossings is an important link in the design and construction of railway and embankment, finite element analysis is used to carry out deformation and internal forces during the construction period at the intersection of Wenzhou S1) Calculation and Security Analysis. The results show that the maximum embankment settlement and the maximum horizontal displacement of the bridge satisfy the requirements of the first embankment after the completion of the project. The influence of the bridge on the overall embankment stress is much smaller than that of the dam itself. In addition, in order to reduce the influence of embankment construction on the pier internal forces and reduce the ultimate settlement of embankments, reinforcement measures such as expanding the scope of cement mixing piles and reducing the spacing of piles should be adopted for the foundation of embankment structure (intersected with piers).