下穿斜交浅埋复杂既有线框架涵顶进施工方法研究

Research on Jacking Construction Method of Under-crossing Oblique Shallow-buried Complex Existing Frame Culvert

随着城市人口增长、经济发展等因素对市政配套设施提出更高的需求,一些改造提升项目无法避开既有铁路与其产生区位上的交叉,为解决交叉问题一般采用上跨或下穿来实现,其中下穿斜交浅埋既有铁路线框架涵多采用顶进施工的方法,本文结合柳州市柳南片区的磨滩支渠排水改造下穿黔桂铁路项目顶进施工为实例,详细阐述了采用D便梁加固,顶进施工下穿斜交浅埋复杂既有线框架涵的施工要点及关键技术。

As the urban population growth,economic development and other factors put forward higher demand for municipal supporting facilities,some renovation and upgrading projects cannot avoid the intersection of existing railways and their generating locations.To solve the intersection problem,they generally adopt upper span or lower crossing.In order to solve the intersection problem,it is generally realized by over-span or under-crossing.Among them,the under-crossing and shallow-buried frame culvert of the existing railway line usually adopts jacking construction method.In this paper,taking the jacking construction of the Motan branch channel drainage transformation under-crossing the Guizhou-Guangxi railway project in Liuzhou as an example,the construction points and key technologies of the D-beam reinforcement and jacking construction under the oblique crossing and shallow-buried complex existing railway line frame culvert are expounded in detail.