Underwater sea sweeping for the second batch of wind turbine foundation construction and installation engineering of the Changle offshore wind farm C area project

　　In underwater sea sweeping for the second batch of wind turbine foundation construction and installation engineering of the Changle offshore wind farm C area project, by using high-precision satellite station differential positioning equipment, high-performance multi-beam sounding system, side-scan sonar system, and advanced three-dimensional real-time imaging sonar system, we completed the acquisition of high-density point cloud data in the range of 150m×150m around the station, high-resolution seabed geomorphic features, and high-resolution detection of seabed stratigraphic features (30m below the mud surface). These methods effectively ensure the quality of detection data. In the process of implementation of this project,  for the first time in China, a 3-D real-time imaging sonar system was creatively applied to geological exploration in the installation area of wind turbine foundations. Its main purpose is to realize real-time imaging in three frequency bands. The low-frequency 3-D imaging system can be used to obtain real-time 3-D images of various underwater targets (including suspended targets in water, bottom targets on the underwater surface and buried targets in the underwater sand and mud), and the 200kHz/600kHz dual-frequency sounder can be used to obtain real-time sounding results. Effectively ensure the high quality performance of the project results.

　　It is worth mentioning that this project won the Tianjin Excellent Surveying and Mapping Engineering Award.