多波束测深方法对坝下泄洪消能建筑物冲刷破坏的检测

为了无损检测坝下泄洪消能建筑物的冲刷破坏程度,将多波束测深方法从海洋测绘引进到水电站检测,结合水下机器人视频验证,对某水电站的坝下泄洪消能建筑物中的冲刷破坏情况进行检测,以查明水泥混凝土护坦的冲刷破坏程度以及边墙的淘刷深度。通过检测的过程及资料分析,确定了多波速测深系统无信号屏蔽的适用条件,对冲刷、磨损、淘空等精细检测特征进行了总结。结果表明,多波束测深系统对冲刷磨损情况检测效果良好,可以清晰判断冲刷磨损范围及程度,对混凝土错台现象反应明显;对冲刷淘空情况检测效果较好,对冲坑部位水下地形绘制精确,对淘空区域的范围及深度判断较好。

Erosion damage detection of a flood energy dissipating system using multi-beam bathymetry method

A multi-beam bathymetry system was introduced from marine surveying and mapping to the hydropower station detection industry so that non-destructive testing for the erosion damage effect of the flood energy dissipating system can be carried out. The multi-beam bathymetry system combined with the video filmed by an underwater robot was applied to detect the erosion damage of the cement concrete mulch and side walls of a hydropower station. Through analysis of the testing process and data, the application conditions of no signal shielding was determined. Detailed detection characteristics such as scouring, wearing and caving were summarized and the result shows the multi-beam bathymetry system has good detection effects for erosive wear especially for the faulting of slab ends of which the scope and degree can be clearly estimated. The multi-beam bathymetry system also has good detection effects for erosive caving and the underwater topography around the scouring pit can be accurately plotted with a better estimation for the scouring scope and depth.