The utility model relates to a reverse drainage quick plugging structure which is used for plugging a reverse drainage
pipe of a concrete faced rockfill dam, the concrete faced rockfill dam comprises a
toe board and a panel, and the reverse drainage
pipe is arranged on the side, close to the panel, of the
toe board. The reverse drainage quick plugging structure comprises an SR
extrusion bag, preshrinking
mortar and a plugging cover plate, the SR
extrusion bag is arranged at the bottom of the reverse drainage
pipe, the preshrinking
mortar is arranged in the reverse drainage pipe and extends to an orifice of the reverse drainage pipe from one side of the SR
extrusion bag, the plugging cover plate covers the orifice of the reverse drainage pipe, and the SR extrusion bag is arranged at the bottom of the reverse drainage pipe. And the plugging cover plate is fixedly connected with the
toe board. According to the reverse drainage quick plugging structure, the reverse drainage plugging time can be shortened, the lifting amplitude of the
water level of the dam body in the plugging period is reduced, and meanwhile the reverse
water pressure jacking problem in the plugged dam body is solved through the measures of soil
filling in the foundation pit, auxiliary
saddle weights and
water body pressing covering after water filling.