SU1428800A1 - Dam - Google Patents

Abstract

The invention relates to hydraulic engineering, to earth dams with an anti-filtration element inside. The purpose of the invention is to increase the reliability of the dam and reduce water losses. The dam consists of a bottom 1 and a high 2 prisms, a clay core 3 and a discharge layer 6. The discharge layer 6 is located on the upstream side from the level of the water surface 5 to the top. it is reachable to the ridge level 4. The discharge layer is made of soil having a capillary height lower than the height of the ridge above the surface of the upper pool water. The discharge layer 6 excludes the raising of capillary water above the ridge 4 of core 3, which prevents capillary overflow of water from the upstream to the downstream. 1 ip.E

Description

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The invention relates to hydraulic engineering, in particular to earth dams with an anti-seepage element inside.

The purpose of the invention is to increase reliability, dams and reduce water losses.

The drawing shows the earth on the dam, the total WC.

The dam consists of a lower I and upper 2 prisms, a clay core 3. The ridge A of the core is located approximately 0.5 mm above the surface of the water 5 in the upper pool. In the part of the upstream prism located between the water surface in the upstream and the level of the crests of the clayey core, the horizontal discharge layer 6 of about 0.5 m height is poured from unbound soil, for example, mid-grained sand, across the entire width of the cross-section of the upstream prism.

The dam works as follows

The capillary water from the surface 5 of the gravitational groundwater in the soil of the upper prism 2 rises along the discharge layer 6 and reaches a capillary rise height of approximately 0.35 m. At this capillary movement of water upwards, after a specified period, the capillary border above the surface gravity groundwater does not reach the ridge 4 ridge 3. As a result, large water losses are eliminated, interrupting drainage and slipping of slopes are poor, which adds reliability to the earth dam with clay cores.

Claims (1)

Invention Formula A dam consisting of lower and upper ground prisms, a clay core and an unloaded soil unloading layer, adjacent to the upper part of the core, characterized in that, in order to increase the reliability of the dam and reduce water losses, the discharge layer is located in part the upper prism between the levels of the water surface in the upstream and the ridge of the clay core over the entire width of the cross section of the upper prism is poured in the form of a horizontal layer having a capillary height lower than the height of the layer itself.