道路下穿高铁桥梁施工会使高铁桥梁桥墩产生过大位移,可能会影响铁路的安全.针对道路下穿高铁桥梁施工对高速铁路的影响,以丹阳市区至滨江新城快速通道下穿京沪高速铁路张巷特大桥工程为背景,利用Plaxis岩土工程有限元软件进行三维施工模拟,并将计算结果输入利用ABAQUS通用有限元软件建立的高速铁路桥上无砟轨道精细化模型,从而评估新建桩板及空心板梁桥下穿高铁桥梁方案施工对京沪高铁桥上无砟轨道的影响.计算结果表明,桩板结构与空心板梁桥方案对高铁的影响均满足结构保护及运营安全要求.%The traversing construction under high-speed railway bridge can cause excessive displacement for high-speed railway bridge piers, which may affect the safety of railway. Aiming at the impact of traversing con-struction under high-speed railway bridge, taking Danyang Downtown-Riverside New City Expressway traversing under the Beijing-Shanghai high-speed railway Zhangxiang Bridge as the object, this study conducted a three-dimensional construction simulation with Plaxis geotechnical engineering finite element software. The calculation results were input into the fine-grained model of the ballastless track on the high-speed railway bridge estab-lished by ABAQUS finite element software to evaluate the influence of the pile-plank structure and hollow board beam bridge traversing construction on high-speed railway bridge. Relevant calculation results show that the in-fluence of the pile-plank structure and hollow board beam bridge on high-speed railway meets the requirements of structural protection and operation safety.
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