砼容重对桥梁悬臂施工挠度的影响研究

Study of Bulk Density of Concrete Impacts on Deflection of Cast - in - Place Cantilever about Bridge

针对目前悬臂施工线性控制中容易出现高程波动，超出规范要求的实际施工情况，本文着重从影响桥梁悬臂施工的各系统参数的识别与调整出发，重点研究了影响桥梁悬臂施工挠度最显著的系统参数一砼容重，利用有限元软件分别分析研究了砼理论容重、砼容重提高5％、砼容重提高7．5％、砼容重提高10％、砼容重提高12．5％的几组调整值，得出各组中砼容重对桥梁悬臂施工线性的影响程度，希望对悬臂桥梁施工监控系统参数识别、调整提供借鉴。

View of the current situation that elevation fluctuaing and exceed regulatory requirements in the actual construction, this paper focuses on various system parameter＇s identification and adjustment of cast - in - place cantilever for a bridge, and studies the most significant system parameter - bulk density of concretem. It analyzes several groups of adjustments about the theoretical bulk density,the bulk density which increased 5%, 7.5% ,10% and 12.5% of concrete, and gets the impacts of concrete bulk density in the several groups to the linear of cast - inplace cantilever method, in the hope that it could provide some reference for system parameter identification and adjustment of cantilever bridge＇ s construction monitoring.