SU1441013A1 - Water supply hydraulic engineering unit - Google Patents

Abstract

The invention relates to hydraulic engineering, in particular to structures for collecting water 114 of the soil. The purpose of the invention is new operational reliability and simplified operation. In the floodplain of the river 7 there is a water-raising dam 1 with a spillway 2, and below it at the base is made a trench 4 with a cross-section filter jumper 12. The downstream slope of the trench 4 is made with an impervious coating. One end of trench 4 communicates with the end section 3 of the spillway 2 and channel 13 is connected to the river 7, and at the other end of the trench a water intake 5 is installed. During wet periods the water to the water intake 5 enters the trench 4 via jumper 12 from the overflow 2, and during low water -. by filtering the water from the reservoir created by the dam 1. With this, the coating and the cemented curtain located below the bottom of trench 4 prevents the filtration of water from trench 4 into the river 7. 2 Cp. f-ly, 2 ill. & (L

Description

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The invention relates to hydraulic engineering, in particular to structures for drawing water from the soil.

The purpose of the invention is to increase operational reliability and simplify operation.

FIG. 1 shows the proposed hydraulic unit of water supply, top view; in fig. 2 shows section A-A in FIG. one.

The hydraulic unit of water supply contains a water-raising dam 1, a water discharge 2 with an end section 3, a trench 4 and a water intake 5. The trench 4 is arranged in a water-permeable base 6 (Fig. 2) below the trunk of the dam 1 across the river 7 and contains an anti-filtration coating 8 (screen) on the downstream slope 7, cementing curtain 9, concrete slab 10 and longitudinal ditch 11 hydraulically / connected to the water intake 5. Coating 8 and curtain 9 constitute an impervious barrier, and trench 4 and the water intake 5 constitute a water intake set up real estate

The end section 3 of the spillway 2 and the water intake 5 are placed at different ends of the trench 4 and separated from each other by a cross-flow filter 12. The trench 4 is connected to the channel 7 by the channel 7. The downstream slope of the dam 1 is provided with drainage 14. The positions 15 and 16 denote water levels in the reservoir created by dam 1, position

17- water level in trench 4, and positions

18 and 19 are the depression curves in the body of dam 1 and base 6, respectively.

The water supply unit works in the following manner.

In the high-water season, the reservoir is filled to the design level 15 (Fig. 2) of water in the upstream. In this case, the depression curve 18 is located in the body of the dam 1 and goes out. drainage is 14, and trench 4 is filled with water to level 17. Excess water from trench 4 through channel 13 flows into the river bed 7.

In the low-water period of the year, when the filtration of water from the reservoir exceeds the inflow of water to the reservoir, it is emptied. At the same time, in the initial emptying period, the water level 17 in the filled trench 4 remains unchanged, and only after the water level in the upstream is lowered to position 16, at which water flow in trench 4 is reduced to the value of water consumption from it (taking into account water filtration from trench 4), the water level in trench 4 begins to decrease. By the end of the low-water period, the water level in trench 4 can reach the bottom of trench 4, and the depression curve can drop to position 19 and fully pass through the base 6. At the same time, the filtration flow will be formed completely due to the groundwater reserve and at the end of the low-water period of the year minimum value.

Trench 4 allows for the intake of water by an open water intake 5 and creates favorable conditions (in the form of a ready well) for quenching the energy of the water flow entering it through the spillway 2. At the same time, the filter jumper 12 prevents water from flowing into the water intake 5.

At the end of the low-water period, the dried trench 4 carries out, if necessary, the restoration or strengthening of the waterproof barrier consisting of the covering 8 and the curtain 9. At the same time, water is supplied to the water receiver 5 through the ditch 11.

The dam 1 is erected with or without an anti-seepage element from the ground of the power harness 4, usually by means of hydromechanization during the high-water season.

Claims (3)

1. Hydraulic unit of water supply, including a water-raising dam with a spillway located across the river valley, an anti-filtration barrier located in a water-permeable base across the river valley below the dam, and a water intake device located between the anti-filtration barrier and a dam made in the form of a depression in the base of the river valley with hydrofoil. characterized in that, in order to increase operational reliability and simplify operation, the recess is made in the form of a trench, An impervious obstruction in the site, and the impedance barrier above the trench bottom is made as a bottom slope of the trench, with one end of the trench connected by a channel with the river and connected to the end section of the spillway, d at the other end of the trench there is a water inlet. 2. The water supply unit of claim 1, characterized in that the trench is provided with a transverse filter strap. 3. The water supply unit of claim 1, characterized in that at the bottom of the trench there is a longitudinal catchment ditch connected to the water intake.  TP / l lx mx) X / 1 L hf) 6ff Fig 2 nineteen 17 f / / at ten 9