深圳地铁3号线广深铁路桥梁桩基托换设计

研究目的:随国内城市和地铁建设发展,地铁与既有交通桥梁交叉干扰不可避免,发展地铁建设与保证既有交通桥梁安全问题的矛盾日趋明显。本文结合深圳地铁3号线红岭站～老街站区间隧道穿越广深高速铁路桥梁桩基托换工程,详细介绍铁路连续梁和连续刚构桥梁桩基托换主要设计难点、要点和施工监测及线形调整设计等,为在复杂施工环境和复杂地质条件下,进行既有铁路桥梁的桩基托换提供一定的借鉴参考。研究结论:根据桩基托换工程主要设计重、难点,采取针对性加强措施,在设计和施工过程中做好信息化管理和系统控制工作,可以保证桩基托换工程的顺利实施和托换桥梁的结构安全。

Design of Bridge Pile Foundation Underpinning of Line 3 of Shenzhen Metro for Crossing Guangzhou- Shenzhen Railway

Research purposes: With the developmenst of city and the metro construction,the cross-interference between the metro and the existing bridge is inevitable,and the conflict between the metro construction and ensuring the existing bridge safety is increasingly clear.Combined with the bridge pile foundation underpinning project of the tunnel in the section between Hongling Station and Laojie Station of Line 3 of Shenzhen metro for crossing the Guangzhou-Shenzhen High-speed Railway,in this paper,the introduction is given in details to the difficult points and key points in design of the pile foundation underpinning of the railway continuous girder and continuous rigid frame bridge,to the construction monitoring and to the adjustment of linear design for providing the references to pile foundation underpinning of existing railway bridge under the complex construction environment and complicated geological conditions. Research conclusions:According to the key points and difficult points in design of the pile foundation underpinning project,the relative measures should be taken and the works of informatization management and the system control should be well done to guarantee the smooth implementation of the pile foundation underpinning and bridge structure safety.