大跨度箱形桥顶进密布横梁线路加固体系设计

Design of Dense Transverse Beam Reinforcement System for Jacking Long-span Box Bridge

目前在既有线不中断行车的情况下,顶进施工箱形桥线路加固的方法有军便梁(D型及B型)加固体系、以纵梁受力为主的纵横梁加固体系和以横梁受力为主的密布横梁加固体系。本文结合哈密铁路货车南环线1-16m箱形桥顶进施工密布横梁线路加固体系的设计,论述了上述三种加固方案的优劣性,并着重介绍了密布横梁加固体系的受力特征及受力分析。

The reinforcement methods of jacking and constructing the box bridge are the military beam(D-type and B-type) reinforcement system, the vertical transverse beam reinforcement system mainly of the longitudinal beam stress and the dense floor beam reinforcement system manly of transverse beam stress under the condition of the existing line without stopping the traffic now. Combined with the design of dense transverse beam reinforcement system for jacking and constructing the 1-16m box bridge in the south ring line of lorry in Hami Railway, the article discusses the superiority and inferiority of the above three reinforcement schemes, and focuses introduction on the stress character and stress analysis of dense transverse beam reinforcement system.