在铁路提速正线既有桥涵原位扩建框构立交桥组合技术的探讨

EXPLORATION ON COMPOSITE TECHNIQUE OF RECONSTRUCTING STRUCTURAL VIADUCT SAT ORIGINAL POSITION OF EXISTING BRIAGE AND CULVERT ON RAISING SPEED MAIN RAIL WAY LINES

介绍在铁路提速正线采取分体结构、分步顶进、控制爆破的军便梁加固等组合技术 ,完成拆除既有桥涵、原位扩建框构立交桥工程 ,取得了良好的经济效益和社会效益。

The composite technique by adopting the composite s tr ucture, continuous jacking, controlled blasting, strengthening the military beam s, etc, to implement the removing of existing bridges and culverts, and to recon struct structural viaducts at their original positions, are introduced in this p aper. By applying these techniques, excellent economic and social benefits have been obtamed.