钢梁施工多点同步顶推技术及质量安全控制  

Technology for Synchronous Jacking-in Steel Girder on Multiple Spots and Quality and Safety Control

作　　者：王伟宁[1] 张利英[1] 

机构地区：[1]华铁工程咨询有限责任公司,北京100055

出　　处：《铁道工程学报》2010年第5期30-34,共5页Journal of Railway Engineering Society

摘　　要：研究目的:郑州黄河公铁两用桥是石武高速铁路跨越黄河的关键通道,主桥采用连续钢桁结合梁多塔斜拉桥,它同时满足高速铁路及高铁上部一级公路的行车要求,技术含量高、施工难度大。为了总结经验,并为类似工程的建设提供有效的借鉴和参考,本文详细介绍主桥钢梁采用的同步顶推架设工法,并着重阐述在主桥架设中确保施工质量和施工安全的控制要点。研究结论:钢梁整体多点同步顶推法的成功,攻克了较大江、河上建设大跨度桥梁的又一个技术难关,也为我国桥梁建设增添了一项成熟的施工技术。该桥建设的实践经验证明,施工现场质量和安全因素的控制,已经成为新技术、新工艺结构成功的基本保障。在质量控制方面,需对杆件制造、杆件拼装、动力源、随机纠偏加以严格控制,才能确保钢桁梁施工的整体质量;在安全控制方面,必须认真做好拼装平台的稳定性与可靠性、构件吊装安全保证措施、顶推力传导体系的监控等方面的工作。Research purposes： The Zhengzhou Yellow River Combined Highway and Railway Bridge is an important passage for Shijiazhuang-Wuhan Passenger Dedicated Line to cross the Yellow River.Its main bridge is a continuous steel truss bond multi-tower cable-stayed bridge to meet the traffic requirements of high-speed railway and grade A highway,and the construction of this bridge needs high technology,with many difficulties.This paper introduces the synchronous jack-in method used for the steel girder of the main bridge,mainly including the key control points of the construction quality and safety.Research conclusions：The successful application of the synchronous jack-in method in jacking in the steel girder on many spots shows the technical difficult problem of building the large-span bridge on river has been overcome,another mutual technology for building bridge has been formed and the control of the construction quality and safety is the essential to successful application of new technology and technique.For the quality control,only when the member bar manufacture and assembly,power resource and random error correction are well controlled can guarantee the entire construction quality of the steel truss girder.For safety control,the monitoring and control works should be done for the stability and reliability of the assembly platform,the measures to be taken for guaranteeing the safety of hoisting and erecting the member bars,and conduction system for jacking force.

关 键 词：钢桁结合梁 斜主桁 同步顶进工法 质量、安全控制 

分 类 号：U445.4[建筑科学—桥梁与隧道工程]