CONSTRUCTING MATERIAL FOR IRRIGATION NETWORK OF SUBMONTANE IRRIGATION ZONES

摘要

FIELD: construction.;SUBSTANCE: invention relates to irrigation and reclamation construction and can be used as a mating structure in the form of single-stage drop for accident-free passage of water in channels of foothill irrigation zone with sharp relief of terrain, providing complete penetration of the fin (beveled reed, driftwood, branches, etc.) from the upper part of the structure to the lower water passage, avoiding water overflow through the dams of the supply channel (as a result of the blockage of the structure by the fin), as well as exclusion of local erosion formation in ejection channel of discharge channel. Connecting structure consists of an entrance part – forebay 1, a wall of incidence – vertical bench 2, a water cushion well 4 and an outlet part. Bottom of inlet part 1 is made with reverse slope at angle α to horizon and expands twice from initial part to end part, which has segment outline. Passage of drawn sediments from inlet part 1 into water cushion well 4 is carried out through tubular channels 3 arranged at bottom of inclined bottom. Width B_v of water well 4 made with vertical walls is equal to width of channel B_k on top. Coupling of outlet part of water-well well to outlet channel is carried out by means of inclined threshold 6 and skew planes 5. Length of inlet and water l_v are shortened.;EFFECT: providing unimpeded passage of the fin from the upper flood of the structure to the downstream, effective damping of excessive flow energy in water-hydraulic part, compactness of structure of structure, leading to saving of material and labor resources, elimination of hazardous local washing-out of channel discharge channel.;1 cl, 5 dwg