高墩大跨预应力混凝土连续刚构桥梁施工控制

Research on Construction Technology of Prestressed Concrete Continuous Rigid Frame Bridge with High Pier and Long Span

本文以龙潭双线大桥为研究背景,通过现场采集的数据,采用灰色系统理论的预测方法,对其下阶段施工的应力及应变进行预测,结合模型所得计算值跟实际测量值进行对比,从而对该桥梁进行控制,通过对比实测值,理论值以及预测值可知,桥梁控制取得较好的效果;基于该桥梁大跨和高墩的特点,本文对其温度敏感性进行分析,通过分析其应力情况在温度荷载下的表现,确定出合拢时的温度条件。

Taking Longtan double bridge as the research background,it is to estimate its stage construction of the stress and strain through the acquisition of data by using the grey system theory prediction method.Combined with the model the calculated value compared with the actual measured value,it is to control the bridge,by comparing the measured values,the theoretical value and predicted value,the bridge control to achieve good results.Based on the characteristics of the bridge with long span and high pier,the temperature sensitivity of the bridge is analyzed.By analyzing the performance of the stress under the temperature load,the temperature condition of the bridge closed is determined.