摘要
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。
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 direction of bridge piers and offset.In the construction of the various conditions,monitoring data in various data are compared with the theoretical calculations to identify problems.The appropriate measures are taken to ensure the safety of high pier structure and quality.
出处
《交通信息与安全》
2011年第3期134-137,共4页
Journal of Transport Information and Safety
关键词
连续刚构桥
双肢薄壁高墩
偏位监测
结构体系转换
continuous rigid frame bridge
double thin-walled high piers
deviation monitoring
transformation of structure system
