跨既有铁路门型墩施工技术研究——以林家堰特大桥为例

Research on Construction Technology of Portal Pier across the Existing Railway——Taking Linjiayan Extra-large Bridge as an Example

门型墩施工因其进度快、成本低被广泛应用于跨既有铁路工程中。文章以林家堰特大桥为例,详细阐述了跨既有铁路门型墩施工技术,从现场实际出发解决了临近既有线桩基、承台和跨越既有线门型墩施工的难题。实践证明,该技术能确保既有线铁路运营安全和施工安全。

Portal pier construction is widely used in projects across existing railways because of its rapid progress and low cost. Taking Linjiayan extra-large bridge as an example,this paper expounds the portal pier construction technology across the existing railway in detail, and solves problems in the construction of pile foundation and bearing platform near the existing railway and portal pier across the existing railway from the actual situation on the site. Practice has proved that this technology can ensure the operation safety and construction safety of the existing railway.