三维激光扫描技术在北江航道沿线水上物外观测量中的应用

Application of 3D laser scanning technology in appearance measurement of aquatic objects along Beijiang channel

针对北江航道沿线水利枢纽、桥梁和丁坝等建筑物结构复杂、常规测量施测困难和测量精度偏低的问题,对三维激光扫描测量技术进行了研究。依托北江某段航道项目,采用三维激光扫描技术,获得航道沿线水上物外观高精度三维点云数据,为航道扩能升级设计提供精细地形图,并建立三维可视化模型,为依托项目BIM设计提供了精细、丰富的测绘成果数据。研究表明,三维激光扫描技术可为航道设计提供丰富的测绘成果,具有良好的技术优势。

Due to the complex structure of the buildings, such as hydro-junctions, bridges, and spur dikes, along the Beijiang channel, the conventional measurement technologies are difficult to implement and offer low measurement accuracy. To overcome these problems, this study investigates a three-dimensional(3 D)laser scanning measurement technology. Relying on a project in a certain section of the Beijiang channel, this study uses the 3 D laser scanning technology to obtain high-precision 3 D point cloud data of the appearance of aquatic objects along the channel and thereby provide fine topographic maps for channel capacity expansion and upgrading design. Then, it builds a 3 D visual model, providing fine and rich surveying and mapping result data for the building information modeling(BIM)design of the project the study relies on. The results show that the 3 D laser scanning technology can provide rich surveying and mapping results for channel design and thus offers favorable technical advantages.