SU1518442A1 - Method of hydraulic deposition of hydraulic structure - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to increase the productivity of work while ensuring accelerated thawing of the frozen soil layer due to the warming effect of infiltration flows entering the soil layers located below the frozen one. On the map of the Alluvium 1 in the direction of natural slope, the channels 2 are arranged. Then, water 8 is supplied to the channel 2. Under the influence of the warming effect of water 8, bed 9 of channel 2 begins to thaw and partially erode. The water supply 8 to the channel 2 is stopped after the bed 9 of the channel 2 is poured to the full thickness H of the frozen layer 3. After that, the flow of slurry is resumed on the alluvium card through the pulp outlets. Channel 2 is washed away and a layer of washed ground is formed. The infiltration flows into the layers 14 of the soil located below the frozen layer 3. The warming effect of the slurry stream increases the thickness of the melt layer 4. Simultaneously, by increasing the temperature in the underlying layers 14, the frozen layer 3 begins to melt from the bottom. 3 hp ff. 4 il.

Description

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 The invention relates to hydrotechnical construction and can be used in the washing of hydraulic structures, in particular tailings, ash dumps, sludge storage and other objects washed from 1-runes that can filter water.

The purpose of the invention is to increase work productivity while ensuring acceleration of thawing of the frozen soil layer due to the warming effect of infiltration flows entering the soil layers located below the freezing one.

Fig, 1 shows a map of the alluvium in Otan; Fig. 2 shows a section A-A, on fkg, I, after the construction of the channels in the partially frozen ice-freezing layer; in FIG. 3, the same, the water supply phase c) in FIG. 4 - the same, the alluvium phase of ir-pyHTa after the application of the bed of channels to the full thickness of the frozen slto.

The process is carried out as follows:

In the winter period, alluvium on the maps will be found in the most favorable mode, that is, without regulation of technological interruptions in the alluvium, it is usually very difficult to arrange anything, the first reclamation process occurs layered; depending on the climatic conditions, the underlying layers of the soil may partly freeze. By the end of the winter period, the total thickness H of the frozen layer is 1.5–2.5 m, 1 after the average daily air temperature becomes positive, and the map 1 is washed out channel 2 1 (Fig. 1 and 2), Rus la 2 can be constructed in various ways. For example, a layer 4 of thawed soil is formed on the surface of the frozen layer 3. Pro-Layer 4 is formed either as a result of the natural partial thawing of the surface of the frozen layer 3 in the process of the corresponding technological break in the wash (Fig. 2), or a certain amount of soil is washed on this layer. Then, in layer 4, thawed soil is arranged in channel 2, for example, by means of channel-forming bodies mounted on the tractor. Channel 2 arrange in the direction of the natural slope of the map 1 alluvium. The dimensions of the cross section of the channel 2 in the General case is chosen based on the flow rate of water supplied to them. When washing

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tailings, for example, it is advisable to take the depth of the channels equal to 0.20-0.25 m and a width of 0.5-1.0 m. The distance between the channels is 10-25 m. If it is not possible to form a layer 4 of thawed soil, then the channel 2 It can be arranged by simply loosening the surface of the frozen layer 3. Loosening is performed by the loosening teeth of the bulldozer. The loosened frozen soil can be not removed beyond the limits of channels 2, since during the subsequent supply of water the frozen clods of soil are thawed and washed away with a stream of water towards the settling pond (not shown). After the formation of channels 2 according to the hydrotransport system, which includes the pulpway 6 with the pulpo outlets 7 laid on the dam 5, the water 8 is fed into the channel 2 (Fig. 3). Under the influence of the warming effect of water, the bed 9 of channel 2 begins to thaw and partially erode. The supply of water 8 to the channel 2 is stopped after the bed 9 of the channel 2 is poured to the full thickness H of the frozen layer 3, Dn intensifying this process, water 8 before feed into channel 2 is possible. . warm up. As a result, peculiar gaps 10 capable of filtering are formed in the frozen layer 3, filled with thawed soil. After that, the alluvium through the pulpups 7 is resumed to the slurry 7. Bed 2 is washed out and a layer of washed soil 11 is formed. Since the continuity of the frozen layer 3 is broken, water from the spreading slurry on map 1 of the wash of the slurry stream 12 begins to infiltrate into the body of the structure. The infiltration flows 13 enter the layers 14 of the soil located below the frozen layer 3. Convective heat exchange is restored. The warming effect of the slurry stream .12 contributes to an increase in the thickness of the melt layer 4 by thawing the frozen 1 layer 3 from above (Fig. 4). At the same time, by increasing the temperature in the underlying layers 14, the frozen layer 3 begins to melt from the bottom to form the thawing layer 15. As a result, the thawing process, that permafrost, is accelerated.

Example, Alluvium is performed at a tailing dump located in an area with a sharply continental climate of 5-1

Tom. The thickness of the soil frozen in the winter alluvium layer is 5 m. The length of the surface float is 500 m. At the end of March, after the surface layer was ot l 0.2 m, a channel 0.2 m deep and 0 wide is arranged in it 6 m. The beds are arranged parallel to each other opposite each pulping system dispersed in the direction to the pond - settler. The distance between the channels is 22 m, the depth of the channel is 400 m (limited by the conditions of patency of the vehicle). Through the pulp outflows, water with a temperature of 5–7 ° C is continuously supplied. After the channel bed is thawed on the full thickness of the frozen layer, the leaching of the tails is resumed.

Claims (4)

1. A hydrotechnical construction method, including washing up with freezing of washed-up and underlying layers of soil, their subsequent defrosting and continued washing, characterized in that, in order to increase work productivity 42 6 while ensuring acceleration of thawing of the frozen soil layer due to the isolating effect of infiltration flows entering the soil layers below the frozen, after the freezing stops, a channel is arranged in the direction of the slope of the washout map on the surface of the boil map and water is fed into them until the bed is completely melted the entire thickness of the frozen layer within the contour of the channel thawing, and alluvium on the map is resumed, do not expect full thawing of the entire frozen layer. 2. The method according to claim 1, about t l and h a yu sch And with the fact that on the surface the frozen layer create a layer thawed soil by thawing a part of the frozen layer or a wash of thawed soil and arranging channels in it by removing thawed soil. 3. The method according to p. 1, on tl and h a yu sch and about the fact that the channel arrange by loosening the surface of the frozen layer, 4. The method according to claim 1, of which is yu and with the fact that the water in the channel served warmed. ttt gttttttp ttt mTTnriTiiiTTiiiHiiiiiiihhiihiiiiiihriiiiiiih FIG. one T.  I H H I I HH gpp hiihiiiiiihriiiiiiih five FIG. 2  eleven  / 1 TT 7 T. 7 .TT G T GG. , , ",. , ... /. . . . , "... . . ". . Fi -. (V . P G.  pv   . “H. . . . . . . / 4 Yu 4- / I lif 4-D FIG