基于激光点云的路桥平面线形拟合方法

Fitting method of Highway Bridge Horizontal Alignment Based on Point Cloud Data

快速、准确的平面线形拟合方法对于路桥养护及其改扩建工程来说至关重要。本文提出一种基于激光点云的路桥平曲线参数拟合方法。该方法基于既有桥梁的三维点云数据,拟合求得分段三次样条函数模型,结合各段函数模型特点计算获取平曲线参数。结合广州市某市政桥梁养护工程进行方法有效性验证,实验结果表明:与传统拟合方法相比,本文方法具有速度快、自动化程度高等优点。

Accurate and rapid fitting method of horizontal alignment is critical to highway bridge's maintenance and its reconstruction or exten sion project. In this paper, a method to fit its horizontal alignment parameters with Li DAR data is put forward.By using one municipal bridge maintenance project as an example, the piecewise cubic spline function model, fitted and obtained through the three dimensions scan of the bridge, along with the consideration of the characteristics of each segment function model is used to work out the horizontal alignment paramet ers. This method is proved to be feasible, speedy, and with high degree of automation when comparing with traditional fitting method.