桩板及空心板梁桥结构下穿软土区高铁桥梁的数值模拟研究  

Numerical Simulation Study of Pile-plank Structure and Hollow Board Beam Bridge Structure Traversing Construction under High-speed Railway Bridge

作　　者：杨菲[1] 

机构地区：[1]山西省交通科学研究院,太原市030006

出　　处：《公路》2017年第11期73-79,共7页Highway

摘　　要：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 rail bridge will lead to excessive displacement for high-speed railway bridge piers, which may affect the safety of railway. Focusing on the influence of the traversing construction under high-speed rail bridge, a three-dimensional construction simulation is carried out with Plaxis geotechnieal engineering finite element software with the background of Zhangxiang Bridge on the rapid passageway from Danyang urban to riverside new city underpassing the Beijing-Shanghai high-speed railway. The calculation results are input into the fine-grained model of the ballastless track on the high-speed railway bridge established 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. The calculation results show that the influence of the pile-plank structure and hollow board beam bridge on high-speed railway meets the requirements of structural protection and operation safety.

关 键 词：道路 市政工程 下穿施工 高铁桥梁 数值分析 研究 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]