既有铁路框架桥架空顶进及验算分析

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摘 要：随着城市及乡村建设的发展和既有铁路提速的要求，需要将大量的铁路与公路平交道口改为立交道口，因上跨铁路投资较大，且受城市规划和用地限制，故在既有铁路线下采用顶进法修建框架立交桥被大量采用。为了保障铁路安全运营，研究既有铁路顶进框架桥的架空顶进对于我国交通发展有着重要的意义。

关键词：既有铁路;立交桥;架空顶进

中图分类号：U445.4   文献标志码：A     文章编号：1003-5168（2022）2-0081-04

DOI：10.19968/j.cnki.hnkj.1003-5168.2022.02.019

Discussion on Overhead Jacking and Checking Calculation Analysis of Existing Railway Frame Bridge

LIU Weisheng

（Zhengzhou Branch of China Railway Fifth Survey and Design Institute Group Co.， Ltd.， Zhengzhou 450000，China）

Abstract：With the development of urban and rural construction and the requirement of increasing the speed of the existing railway， it is necessary to change a large number of railway and highway level crossings into interchange crossings. Because of the large investment in the upper span railway， and restricted by urban planning and land use， the construction of frame overpasses under the existing railway by the roof method is widely adopted. In order to ensure the safety of railway operation， it is of great significance to study the overhead jacking of existing railway jacking frame Bridges for the development of China's traffic.

Keywords：existed railway;highway interchange;overhead and bridge pushing

1 工程概况

本工程设计为2～13 m钢筋混凝土框架，结构高度8.5 m，框架桥顺铁路线路方向长42.03 m，框架边缘伸出铁路路肩垂直铁路线路方向长16.0 m。（剩余3068字）

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