铁路站前框架式挡土型高架结构规划设计

连接铁路客站落客平台和周边道路的高架结构以梁式桥居多，宁杭高铁湖州站的站前北接线高架由于道路线形、建设工期、与客站地块衔接等原因，部分区段采用框架式挡土型结构。采用框架结构初步拟合、路面基层二次找坡、道路面层修正的三步骤方法拟合道路线形；采用箱涵式挡土墙为管线及人员检修预留空间，同时在挡土墙内底填充素混凝土以满足挡墙稳定性要求；在挡土墙的外侧顺道路方向设置钢筋混凝土墙体，增加结构的侧向刚度、改善结构受力；在结构与高填土路基段的交界区域，设置了搭板缓解路面差异沉降，并设置伸缩缝改善车辆行驶的平顺性。可为类似工程提供参考。

Frame Structual Planning and Design of Earth retaining Elevated Road in Front of Railway Station

Girder bridge is widely used as elevated road connecting drop off platform in front of railway station and surface road. Soil retaining frame structure is used instead in the north elevated road in front of Huzhou railway station considering road alignment,project time,and land mass connect.Frame structures preliminary fit, aggregate base sloping, and pavement elevation revisions are used as a three step method to fit road alignment. Culvert type retaining wall is adopted to reserve pipeline inspection space, and poured in place concrete is used conforming to the stability requirements of retaining wall.Reinforced concrete wall parallel to elevated road is set at the side wall of the retaining wall to increase the lateral stiffness of whole structure. Approach slab supported by a bracket is used to relieve road settlement difference, and expansion joint is adopted to improve driving comfort. The project serves well and can be used for reference for similar cases.