SU1613530A1 - Dam - Google Patents

Abstract

The invention relates to hydraulic construction and can be used in the construction of a dam of local materials in areas with harsh climatic conditions. The purpose of the invention is to increase the reliability of the dam by reducing the migration of water to the ridge of the impervious element when it freezes. The dam contains a soil core 1, filters 2-5, side prisms 6 and 7, a protective layer of non-foamy soil 8 and a plastic film 9. Film 9 is located in the core 1 horizontally at the level of freezing depth of core 1 and above water level 11 before the dam in winter period. On both sides, the film is provided with protective layers 12 and 13 of an elastic-porous polymer with an open porous surface. 3 hp f-ly, 2 ill.

Description

The plant is a hydrotechnical construction and can be used in the construction of a dam from local motrrill in areas with harsh climatic conditions.

The purpose of the invention is to increase the reliability of the dam by reducing the migration of the ridge to the ridge of the impervious element when it freezes. And Fig. 1 shows a dam, cross section, FIG. 2 - the same for the case of freezing of the impermeable element to a great depth and with a high forcing of the water level in the upstream. The dam contains a soil filter element in the form of core I, filters 2 and 3 on the upstream side of core 1, filters 4 and F on the downstream side of the core, lateral outgrowths of cameo i-cassette (Perhope G) and downstream 7). protective layer 8 of nopuchisty soil and polymer film 9.

Film 9 is located horizontally at depth h from the crest of the dam 10 in depth I and defined by thermal engineering calculations of the depth of the freezing core I and above the level I is in front of the dam during the significant period. On both sides, the film 9 is provided with protective layers: d | single1 12 and covering 13 of an elastic-porous polymer with an open-surface, for example, foam rubber or spongy rubber. The film 9 in the core I may be located obliquely, the configuration of the freezing front.

The dam works in the following way. C. With the onset of the winter period, the level of the sub-floor before the subsistence level decreases from the summer level of 14 to the winter level of I. Saturation of the POLOK) The second period of the upper part of the core I. The heated film 9 is gradually dehydrated due to the feeding of the fillet of the pit 2 and 4 under the action of sng vigcin and due to the migration of water to the freezing front into the protective layer 8 and filters 2 and -4. In this case, the waterproof film 9 prevents the inflow of water from the lower part j and thus seals the upper freezing part of the ice core from the formation and increase in volume (heel). Locking layers 12 and 13 of an elastic-porous polymer are compressed with soil and their open pores on the side of the core are filled with neHiii ipyMTOM, which turns layers 12 and 13 into practically impermeable to

downstream, and the ground at the contact

with layers, it acquires a stable tee property during contact filtration.

In case of freezing of the core to a greater depth and high spring formation of the water level in the upper reach / c, (Fig. 2), the dam’s reliability can be increased by reducing the height of the upper freezing part of core I by limiting the crest level to the summer level of water simultaneous extension of the film 9 in the form of a screen 15 from the upstream side from the core to a mark exceeding the maximum water level in the upper reach (FPU). In this case, the screen 15 protects the upper part of the core 1 from penetration into

water from both the upstream and rainwater from the crest of the flesh and together with the film 9 at all water levels in the upstream constantly throughout the year, including if the winter water level in the upstream is exceeded horizontal film 9, protects the upper part of the core 1 from water penetration into it, thus preventing the core 1 from frosty snow

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Claims (3)

1. A dam, which includes a soil filtering element, side prisms, a standard layer of non-ductile soil and a plastic film, located in the upper suit of palatability, which is different from that. in order to improve the reliability of the dam due to the reduction of water migration to the ridge of the filter element when it is measured:; 1iii. diminutive captivity short-circuit is located and the grating element of the gronzont; 1n n; i the level of the depth of freezing or oblique, This film is placed with the intersection of the refractory core of the HNH element through its entire thickness. 2. A dam according to claim 1, characterized in that the film is installed with non-flooded water in front of the dam in winter. 3. A dam according to claim 1. characterized in that the film on both sides is provided with protective layers made of an elastic porous polymer with an open porous surface. 4 A dam according to claim I, wherein that the film from the side of the upper reach is displayed in the form of a screen on the horse's edge of the core, and in the protective layer is set FPU Hjw v / / / / / / 632 1 12 57 Fig 2