Abstract: When rehabilitation, it is necessary to detect level degree of underwater dam surface. In this paper, level degree detection by multi- beam was proposed and applied in practice. Furthermore, after field point cloud data processing, the TIN was built and 3D simulation was performed on the Microstation platform, which reflected the underwater dam surface. This method is of great value for rehabilitation construction and worthy popularization.

摘要： 目前, 在对一些运行时间较长的水电站和水库大坝进行防渗补强处理时, 需对水下坝面平整度进行检测。本文有针对性地提出了采用多波束水下坝面平整度检测方法, 并在实践中加以探索性研究, 为解决工程的实际问题提供切实可行的方法。同时, 通过对野外采集的“点云”数据进行分析和处理, 在Microstation 环境下进行构TIN 和三维模拟, 能够形象直观地再现水下坝面的实际情况, 为大坝防渗补强施工提供技术支持, 取得了较好的效果, 具有良好的推广和应用价值。