下穿铁路框架桥纵横梁加固体系的改进和应用

Inovation and Application of Under-railway Frame Bridge Vertical and Horizontal Beam Reinforcement System

顶进框架桥的线路加固系统的安全性及稳定性决定了桥涵顶进施工的顺利与否,特别是在地下水位高、软土地区进行此类施工时,路基塌方成为了重大危险源。结合金钟路下穿北环铁路框架桥工程,介绍了大纵梁线路加固体系,施工实践证明此加固体系提高了该类地区顶进框架桥施工的安全系数。

The safety and stability of jacking frame bridge route reinforcement system plays an decisive role in bridge cul- vert jacking construction. Roadbed landslide becomes the major hazard, especially in the construction with high ground wa- ter level and weak soil. The paper introduces large longitudinal reinforcement system based on the project of Jinzhong Road passing under Northern Link Railway Frame Bridge. The construction experience proves that the reinforcement system im- proves the safety factor of jacking frame bridge construction in this kind of area.