上跨既有铁路连续梁顶推施工桥墩监测分析  

Monitoring on Piers of the Continuous Bridge with Railways on the Span during the Incremental Launching

作　　者：李贵峰[1] 史庆春[1] 

机构地区：[1]天津市市政工程设计研究院,天津市300051

出　　处：《北方交通》2015年第6期40-43,共4页Northern Communications

摘　　要：连续梁在顶推施工过程中,由于结构体系不断转换,导致桥墩受力也不断变化,不仅要承受来自梁体的竖向压力还要承受较大的水平推力,致使桥墩出现裂缝,威胁施工安全。因此在施工过程中必须对墩顶位移加以监测,以确保顶推施工过程的安全可靠,保证桥墩的正常使用性能以及耐久性能。对某连续梁桥顶推施工全过程桥墩的受力情况进行了实时监测,并对监测结果进行分析,提出了建议,对类似工程具有参考价值。As the structural system keeps changing during the incremental launching,the stress on piers of the continuous bridge keeps changing as well. The piers have to burden not only the vertical pressure given by the beam but also the horizontal thrust,which will probably lead to cracks on the piers and threats the construction safety. Thus,during the construction,displacement of the pier top shall be strictly monitored to guarantee the safety and reliability of the incremental launching as well as the usability and durability of the bridge. In this thesis,the force bearing status of a certain continuous bridge during the incremental launching process has been monitored in real time and the monitoring results have been analyzed to give further suggestions,which can be regarded as reference for similar cases.

关 键 词：连续梁 顶推施工 水平推力 墩顶位移 实时监测 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]