SU1618822A1 - Local material dike - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to reduce the requirements for local materials and construction costs. The dam includes the upper slope screen 1, the stop prism 2, the base screen (sole) of the stop prism 3 and the junction of the slope screen interface with the bottom screen 4. On the slope screen there are a protective layer 5 and a mount 6, and under the screen an underlying layer 7. In A drainage 9 was laid at the base of the dam, connected to the outlet ditch 10. The screen 11 and the protective layer 12 are located on the ridge and the lower slope of the dam. 1 Il.

Description

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The invention relates to hydraulic structures, namely to bulk dams made of soil materials with a screen.

The purpose of the invention is to reduce the requirements for local materials and construction costs.

The drawing shows the structure of the dam.

The dam includes an uphill slope screen 1, a stop prism 2, a bottom screen (sole) of the stop prism 3, and a junction of a slope screen interface with a bottom screen 4.

On the surface of the dam slope screen there can be a protective layer 5 and a mount b, and under the screen an underlying layer 7.

The dam is located on a water-permeable base 8. A drain 9 can be laid on the bottom of its bottom wedge under the base screen to reduce the filtration pressure, which is connected to the outlet ditch 10.

To protect the ridge and lower slope of the dam from precipitation and other destructive factors, screen 11 and protective layer 12 can be laid on the ridge and lower slope.

The thrust prism of the dam is poured with a layer-by-layer mechanical compaction or thick layers without compaction from soils or industrial wastes, which under the action of water soften, dissolve or erode, and also from those formed during the development of useful excavations and opening of open pits of minerals from various soils with non-resistant rocks.

A thrust prism without mechanical compaction is poured with a margin on the draft, with the screening ahead of time for the time required to complete the main draft of the material laid in the thrust prism.

The raised slope 1 screen is erected from impermeable non-ground materials (plastic film, asphalt, concrete, etc.), and the base screen is made from non-ground materials or clay soils.

The interface of these screens should ensure the watertightness of the anti-filtration devices of the dam that protects

prism material from the dangerous effects of filtration flow.

The base screen is placed over the entire width of the sole of the stop prism or

only in the area falling into the zone of influence of the filtration flow. A portion of the sole of the stop prism located above the surface of the filtration flow at a distance exceeding the height of the s. Pillary saturation of the soils (tailings) lying at the base of the dam can be avoided. Such a case is possible with the use of dams of the proposed construction as secondary with the expansion of tailings. In this case, to prevent filtering between the dams erected on different russes of flush, it is necessary to provide the interface of their anti-seepage devices.

To protect the film screen from damage, a protective layer can be laid on its surface, and an underlying layer under the screen. These layers are poured from sand, tails, sandy loam or loam. On the surface of the screen of asphalt concrete or concrete protective layer is usually not fit. The screens of these materials also perform the function of fastening the riding

slope of the dam.

When constructing a screen for the base of a dam made of clayey soil, drainage 13 is placed on its surface, which allows reception and discharge into the drainage ditch of filtration water. The surface of this drainage should exceed the possible water level in it not less than the height of the capillary saturation zone of the material laid in the drainage.

Claims (1)

Claim of an invention A dam made of local materials, including a stop prism and a screen located on its upper slope, characterized in that, in order to reduce the cost of construction and the requirements on the material of the stop prism, a screen is placed at the base of the stop prism that is coupled to the upper dam screen In this case, a drainage layer is placed at the base of the stop prism above the screen, which is connected to the vent system outside the lower slope.