基于大跨径PC梁桥长期下挠的施工控制策略研究  

Study on Construction Control Strategy Based on Long-term Down Deflection of Long-span PC Girder Bridge

作　　者：夏江泉 XIA Jiangquan

机构地区：[1]宁德市交通建设工程质量监督站,福建宁德352100

出　　处：《城市道桥与防洪》2020年第3期123-126,M0014,M0015,共6页Urban Roads Bridges & Flood Control

摘　　要：大跨径PC梁桥运营期常出现持续下挠,甚至发生开裂,该现象广受专家学者的关注。目前对长期下挠机理的研究已经取得了大量的成果。并对该桥型的设计提供了一定的技术支持。但桥梁施工现场环境多样,工序复杂,施工过程的相关因素对PC梁桥的长期下挠也有着不可忽略的影响。针对这一问题,将通过对施工过程中结构长期下挠变形影响因素的分析,提出了相关影响因素的施工控制和管理方法,为相关桥梁长期下挠控制提供参考依据。The continuous down deflection often occurs during the operation of long-span PC girder bridge and even cracking.This phenomenon is widely concerned by the experts and scholars.At the present,a great deal of result has been achieved in the study on the mechanism of the long-term down deflection.A certain technical support is provided for the design of this kind of bridge.But the construction site environment of bridge is diverse and the process is complex.The relative factors in the construction also have significant effects on the long-term down deflection of PC girder bridge.Aiming at this problem,the construction controAbstract:The continuous down deflection often occurs during the operation of long-span PC girder bridge and even cracking.This phenomenon is widely concerned by the experts and scholars.At the present,a great deal of result has been achieved in the study on the mechanism of the long-term down deflection.A certain technical support is provided for the design of this kind of bridge.But the construction site environment of bridge is diverse and the process is complex.The relative factors in the construction also have significant effects on the long-term down deflection of PC girder bridge.Aiming at this problem,the construction control and management methods of the relative influencing factors are proposed by analyzing the influencing factors on the long-term down deflection and deformation of structures in the construction,which provide the referring basis for the control of long-term down deflection of the relative bridges.

关 键 词：长期下挠 敏感性分析 线形控制 精细化管控 

分 类 号：U445[建筑科学—桥梁与隧道工程]