RESERVE SPILLWAY OF SOIL RETAINING STRUCTURE (VERSIONS) Russian patent published in 2016 - IPC E02B7/06 E02B8/06 

FIELD: construction.

SUBSTANCE: reserve spillway of a soil dam includes one (according to version 1) or several (according to version 2) soil eroded inserts in the form of sections 13, which represent a dam or a dike with a top elevation lower than in the retaining structure. The eroded insert is made in the form of a prism of trapezoidal cross section arranged in the water-conducting part of the reserve spillway. Along the perimeter of the trapezoidal cross section of one (according to version 1) or several (according to version 2) sections 13, as well as on upper and lower slopes there is a protective coating arranged from a polymer geomembrane, which is filled during construction with soil similar to dam body. To increase efficiency of evacuation of eroded inserts at several sections 13 of the spillway (according to version 2), the top elevation of eroded inserts 6 is set: for the first section - at the FPU elevation, for the second - at the elevation (FPU-0.5 m), for the third - at the elevation (FPU-1.0 m), etc., providing for serial connection of first the last section, then the last but one, and so on. The main spillway 14 is located in the soil dam body at the elevation of the normal retaining level (NRL).

EFFECT: safe passing of rare-frequency flood and prevention of soil retaining structure damage.

9 cl, 5 dwg