为了无损检查深埋长隧洞在长期运行后的冲刷破坏程度,为其运行安全评价及检修维护方案的制定提供数据依据,采用遥控无人潜水器ROV(Remotely Operated Vehicle)系统中的声呐进行全覆盖扫描,对重点关注部位及声呐探测异常区域结合水下机器人系统中的视频进行验证,检查混凝土表面缺陷以及附着物情况、底板磨损情况和结合部位完好性等。通过工程实践,有效地提供了长期承受高水流冲刷作业的深埋长隧洞的运行现状资料,总结了ROV应用中的优势及不足,为ROV在类似工程水下检查中的推广应用提供参考。

Remotely operated underwater vehicle (ROV) is employed in the nondestructive inspection of erosion damage of a deep-buried long tunnel after long-term operation to offer data basis for safety evaluation and maintenance. The defectives and deposits on concrete surface, the abrasion of tailrace floor, and the integrity of contact locations are inspected via full-coverage scanning using sonar in the ROV system; important parts and sonar-inspected abnormal areas are verified through videos obtained by autonomous underwater vehicle. This engineering practice provides engineers with the operation status of deep-buried long tunnel subjected to long-term scouring. In addition, the advantages and shortcomings of the application of ROV are also presented.