Anti-erosion device for box girder bottom drain hole

Abstract

This utility model relates to an anti-seepage and anti-erosion device for drainage holes at the bottom of box girders, comprising a water-guiding layer, an extension pipe, a rubber water-stop ring, a water-stop tape, a horizontal baffle plate, and a cover plate. The upper end of the extension pipe is inserted into the lower end of the drainage hole, and the rubber water-stop ring is placed between the extension pipe and the drainage hole, with the lower end of the rubber water-stop ring sealed by the water-stop tape. The water-guiding layer is placed at the upper end of the rubber water-stop ring and the extension pipe, extending to the inner side of the extension pipe. A ring of drainage holes is provided at the lower edge of the extension pipe, and the horizontal baffle plate is fixed to the bottom of the extension pipe to axially seal the extension pipe. The cover plate is placed at the bottom of the horizontal baffle plate. This utility model guides the water accumulated inside the box girder to be discharged through this device, preventing the water accumulated inside the box girder due to various factors during bridge operation from flowing out along the drainage hole under the action of gravity and eroding the concrete centered on the drainage hole. It belongs to the field of anti-seepage and anti-erosion technology for box girders.

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