面向桥路中线衔接的GPS桥梁施工控制测量研究

Research on GPS Bridge Construction Control Survey for Bridge Road Central Line Connection

GPS技术在公路和铁路建设控制网络中的应用,对于GPS技术的发展和大型桥梁的控制测量都具有重要意义。为了解决GPS测量控制网络的轴线与路径控制网络中心线之间正确合理连接的问题,本文提出了一种GPS桥梁施工控制网络的方法,将边缘引入到GPS桥梁施工控制网络中。长距离约束和方位角约束避免了传统方法引起的控制网络精度失真,并更好地确保了路径的连续性以及舒适度和平滑度的设计效果。工程实践表明,通过合理的点分布计划和适当的数学模型,约束平差不仅可以使轴与中心线正确地连接,而且可以保证其精度且符合施工控制测量要求。

The application of GPS technology in highway and railway construction control network is of great significance for the development of GPS technology and the control survey oflarge bridges.In order to solve the problem of correct and reasonable connection between the axis of GPS survey control network and the center line of path control network,this paper proposes a GPS bridge construction control network.In this method,the edge is introduced into the GPS bridge construction control network.Long distance constraint and azimuth constraint avoid the accuracy distortion of control network caused by traditional methods,and better ensure the continuity of the path and the design effect of comfort and smoothness.The engineering practice shows that the constrained adjustment can not only make the axis and the center line correctly connected,but also ensure its accuracy through reasonable point distribution plan and appropriate mathematical model.Meet the requirements of construction control survey.