GROUND HETEROGENEOUS ROCK-FILL DAM Russian patent published in 2009 - IPC E02B7/06 

FIELD: construction, hydraulic engineering.

SUBSTANCE: invention relates to hydraulic engineering and construction of ground heterogeneous rock-fill dams. The dam includes transient layer in its cross section. This layer is made from ground consisting of preset grain size. It crosses dam body by height and separates part of dam body consisting of fine grained ground from the part of dam made from macro fragmental ground. The said transient layer is represented with a gabion-tired wall with box-shaped baskets. The said gabions are made from wirework. Each cell of the basket is filled with ground taken from the transient layer. Geo synthetic and/or mineral fiber separating layer is located between gabion wall and fine grained ground of dam. Each ground potion is enclosed into a flexible casing made from geo textile sheet. The box-shaped casing sizes are at least equal to basket cell sizes ensuring tight ground portion fitting to wirework of basket cell. Separating layer is implemented as counter-suffosion element made from water-proof fiber materials, mainly geo textile sheet and/or mineral fiber slabs. Design diametre of water delivery openings in water-proof fiber material satisfies the following condition: where d^max - maximum diametre of ground particles. Temporarily, it is acceptable and possible that the above particles could be moved by filtration flow in the direction of counter-suffosion element during dam operation. Separating layer may be made as counter-filtration element containing water-proof membrane.

EFFECT: invention allows for reducing ground amount in transient dam layer and improving dam reliability during operation.

4 cl, 8 dwg