大跨连续刚构桥薄壁高墩偏位监测研究

随着连续刚构桥向着大跨度和高墩结构形式发展的同时,对高墩的施工监测提出了新的要求。既要克服现场地形地貌和测量空间距离大的困难,又要满足测量精度的要求。文中基于贵阳至都匀高速公路芭茅冲特大桥施工监控的具体实践,采用在桥墩多点布设棱镜作为永久观测点的方法,对桥梁施工的各个重要工况进行桥墩偏位监测。该方法能快速判定桥墩偏移的方向和偏移量,将特大桥施工时各个工况下监测数据与理论计算数据进行对比能及时发现问题,并采取相应的措施,保证了高墩结构的安全和质量。

Deviation Monitoring of Span Continuous Rigid Frame Bridge Thin-walled High Pier

The trend of continuous rigid frame bridge is toward big span structure and high piers,which calls for the new requirement of the construction monitoring including overcoming the difficulties in the site topography and long distance in measuring space,and satisfying the measurement accuracy.This paper,based on the construction monitoring of a bridge in Guiyang-Duyun Expressway,accomplishes pier deviation monitoring by arranging prism as permanent observation points.The method can quickly determine the direc...