FIELD: construction.
SUBSTANCE: device contains a pipeline consisting of a water intake 3, an inclined 4 and a water outlet section 5. The water intake section 3 is laid on the coastal slope of the dam, and the outlet 5 is located in the downstream. A horizontal platform 8 is formed on the inclined pipe segment 4 to form the sand insert 10. Above the platform 8, a loading aperture 9 with a lid 11 is provided, the lower surface of which fits snugly against the sandwich insert 10. The water outlet section 5 of the pipeline is mounted with respect to the horizontal platform 8 with an upward lift, in turn, the platform 8 is provided with a geotextile grid and communicates via a drainage channel 13 with a water well 14.
EFFECT: invention increases the discharge capacity of the spillway and ensures the activation only when the critical level is reached.
4 cl, 6 dwg
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