Underwater repair system for cavity region of concrete panel rock-fill dam panel

An underwater repair system for cavity region of concrete panel rock-fill dam panel, comprising:

• a moving platform, a work cabin, a pressure drainage apparatus, a traction apparatus, a positioning apparatus, a first guide rail, and a second guide rail;
• the work cabin and the positioning apparatus are arranged on the moving platform, and the traction apparatus controls the movement of the moving platform on the surface of a dam concrete panel;
• and the positioning apparatus transmits a detection position;
• the work cabin is a pressure cabin with an upper closure structure, the work cabin is connected to the pressure drainage apparatus, the work cabin is provided with a drill apparatus and a grouting apparatus;
• the moving platform moves to a cavity region, the pressure drainage apparatus starts to drain the water in the work cabin to form a partially closed waterless space inside the work cabin, the drill apparatus drills the panel at the upper end of the cavity region and the grouting apparatus subsequently implements grouting to complete the repair;
• wherein the work cabin is connected to the first guide rail so that the work cabin vertically slidable along the first guide rail;
• wherein the drill apparatus and the grouting apparatus are arranged on the second guide rail so that the drilling apparatus and the grouting apparatus are movable within the work cabin to reach a position where drilling is required.