EARTHFILL DAM WITH COMBINED SPILLWAY Russian patent published in 2023 - IPC E02B7/06 

FIELD: hydraulic engineering.

SUBSTANCE: invention relates to hydraulic engineering, namely to hydraulic systems with soil dams and spillways. The earth dam is made of permeable material with impervious screen. At the estimated water level in the reservoir, a U-shaped reinforced concrete box without a bottom with a slotted wall on the side of the reservoir is placed, and on the base of the dam within the lower part of the downstream slope, a box without a bottom is installed, filled with permeable material, with slotted walls facing the side of the reservoir and towards the downstream. The box on the crest of the soil part of the dam is made without a wall on the downstream side and has a threshold, and on top the box is covered with a reinforced concrete slab with a parapet, which serves as the crest of the dam. Behind the box, along the downstream slope of the earth dam, there is a fast flow of wedge-shaped plates, the first plate of which is adjacent to the threshold, and the last (lower) plate is the cover of the lower box for discharging the seepage flow into the downstream, and the top of the cover coincides with the minimum water level UNBmin, at which the conjugation of the pools is ensured by a safe surface jump. This design of the combined spillway allows you to significantly increase its throughput. In addition, the use of the proposed earth dam design with a combined spillway makes it possible to reduce the cost of the hydroelectric complex by reducing the volume of the earth dam body, as well as by abandoning expensive coastal spillways or spillways inside the dam body of traditional designs (mine, tower, etc.).

EFFECT: increase in the throughput capacity of the spillway due to the combination of a filtering spillway and an open spillway in the form of a fast flow into a single complex.

3 cl, 1 dwg