高水位粉砂土地质条件下多孔框架桥下穿多股铁路的顶进施工技术

框架桥是目前代替公路(或市政道路)与铁路平交路口的常见建筑设施,由于它结构简单、施工便利、对铁路影响小、造价低廉、投入使用后安全可靠等优点,正越来越被广泛采用。论文所述的框架桥施工处于地下水位较高的粉砂土地质条件下,顶进施工时涉及到多股铁路线路,且具有框架长、自重大、顶程长等特点。结合此工程实例,系统阐述了框架桥顶进施工的施工过程和施工工法,可为今后类似工程提供借鉴和参考。

Construction Technology of Jacking Frame Bridge Beneath Multi Railway Lines at the Silty Soil Area with High Ground Water Level

Frame bridge is a common building facilities which can be used to substitute for the plane intersection between the railway and the highway or municipal road. Due to the advantages of simple structure, convenient construction, small impact to railway, low cost, safe and reliable when it is put into use, etc., this structure has been adopted widely in practice. The frame bridge introduced in this paper is located in the silty soil area with high ground water level. During the jacking process of frame bridge, the main problem involved in this project is that there are multi railways lines should be crossed. What is more, the frame bridge is a long structure, which results in heavy weight and long jacking distance. Combined with this engineering example, this paper mainly illustrates the construction process and construction method of jacking frame bridge, which can also be referenced by other similar future projects.