SU1663098A1 - Method for soil washing up - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to increase the efficiency of washing in by reducing the entrainment of the soil and to ensure the possibility of agricultural use of the washed area. In preparation for reclamation, transverse dams 3 embankments are filled with filtering material. On the cards 1, additional transverse dams 4 are filled with the formation of bypass holes 5 for the passage of pulp. In addition, separate rolls 6 are poured between adjacent additional transverse dams 6. The pulp is released onto the map from the alluvial slurry pipeline 7 through nozzles 8, which are directed perpendicular to the slope. Alluvium is carried out by strip along the length of the area. The clarified water is discharged through a discharge well 9 installed on the lowest strip map. 3 hp ff, 3 ill.

Description

The invention relates to hydraulic engineering construction, in particular to the development of areas excluded from agricultural production, such as cones in the foothill areas.

The purpose of the invention is to increase the efficiency of the in-wash by reducing the entrainment of soil and ensuring the possibility of agricultural use of the washed area.

FIG. 1 shows the reclamation procedure; in fig. 2 - profile of the washed area; in fig. 3 - the scheme of the order, alluvium cards.

FIG. 1-3 are marked: map 1, alluvial, longitudinal dam 2 embankments, transverse 3 embankment dam, additional transverse dams 4, overflow hole 5, rolls 6, alluvial slurry pipeline 7, nozzles 8, waste well 9, waste collector 10, drainage pipes 11, settling pond 12.

The method is carried out as follows.

The area allotted for agricultural development is divided into 1 alluvium maps, along the perimeter of which the longitudinal 2 and transverse 3 embankments are filled. Longitudinal 2 and transverse 3 dams are poured out of the filtering material, the drainage pipes 11 are laid along the axis of the dams. In this case, the drainage pipes 11 are laid in transverse dams with a slope from the middle of the dam to the longitudinal dams 2. The embankment dams located along the washed area border are poured from neofilo

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material. Drainage pipes 11 are laid in longitudinal dams 2 and connected to a waste collector 10. In this way, a closed drainage system is created, which will function both during the washed-in area and subsequently as a drainage network during the development of the washed-up area as irrigated land.

Alluvium is carried out in strips (see Fig. 3), consisting of a sequential chain of maps, along a slope for the entire length of the area being mastered. Obvalovaniyu poured simultaneously on all maps of the next-. Then, additional transverse dams 4 are poured on the top map, between the last and longitudinal dams 2 embankments form bypass holes 5 for the pulp to pass (Fig. 1). After that, between the additional transverse dams 4 along the slope, separate rolls 6 are poured (not higher than additional transverse dams 4), which serve as an artificial roughness and help to hold the soil between the additional transverse dams.

From the alluvial slurry piping 7, the slurry is fed to the map through nozzles 8 in a direction perpendicular to the slope. The nozzles 8 feed the pulp between adjacent additional transverse dams 4, which provides a zagzagoobrazny movement of the pulp and a consistent change in its direction, as well as the uniform distribution of soil on the map in the transverse direction.

The soil is distributed on the alluvium map, and the clarified water is filtered through the transverse dam 3 embankments onto the underlying map, and from there to the next. At the lowest along the slope of the map, a waste well 9 is constructed, and the clarified water is discharged through the waste manifold 10.

In this order, the first preparatory layer is washed (see Fig. 2),

The following requirements are imposed on the area allocated for agricultural development: a layer of fertile soil must be at least 0.5 m. Slope no more than 0.05, the presence of drainage. When the first layer is washed up, two conditions are fulfilled, reduce the slope to 0.05 by filling additional transverse dams 4 so high that their tops are located on the line of a given slope, and transverse embankment dams 3 of filter material can subsequently perform the drainage function.

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However, the first layer includes additional transverse dams 4 from the barren soil of the base; therefore, the second layer is washed from above with a height of at least 50 cm, having previously increased additional transverse dams.

The sequence of operations is the same as in the case of a wash of the first layer, however, additional transverse dams are poured out of the washed fertile soil of the same height. In some cases, one layer can be washed in, additional transverse dams can be dumped all the way to the full height.

Thus, the reclaimed area has a prescribed slope not exceeding 0.05, a layer of fertile soil of at least 0.5 m and drainage elements in the form of filter dams with drainage pipes.

In some cases, when the sand content in the washed soil is more than 30%, it is possible to wash the first layer with pulp bypass onto the following map, using it as a settling tank for small particles, which after consolidation are bulldozed on the overlying map.

Bypassing clarified water through filtering cross-bank embankments of embankment 3 along a chain of maps virtually eliminates soil carryover with waste water, especially in case of fine-dispersed soils.

Thus, the application of the proposed method reduces the speed of the pulp and. as a result, excludes erosion erosion of the soil.

Claims (4)

1. The method of alluvium soil, including the flow and distribution of pulp on the map an alluvium formed by longitudinal and transverse dams, and a subsequent discharge of clarified water, characterized in that, in order to increase the effectiveness of the alluvium by reducing the entrainment of soil and enabling agricultural use of the washed area, the distribution of pulpra on the map of alluvium is performed with a sequential change in the direction of its movement by erecting additional transverse dams with bypass holes at their opposite ends, each subsequent dam being erected above the previous one, and their tops are located the lines of a given slope, moreover, the embankment dams located along the boundary of the washed area are filled with non-filtering material, and some of the longitudinal and transverse dams lag behind the filtering material and place a closed a drainage system consisting of drainage pipes, with the pipes in transverse dams being inclined to the longitudinal dams. 2. A method according to claim 1, characterized in that separate rolls are erected between additional transverse dams. 97 I 3. A method according to claims 1 and 2, characterized in that the pulp is fed in a direction perpendicular to the slope. 4. Method according to paragraphs. 1 to 3, characterized in that a waste collector is placed below the area to be washed, which is connected to the drainage pipes of the longitudinal dams. four. . .05 - L 0.05 1 layers 9 12 (rig 2