SU1323650A1 - Method of washing salinated land - Google Patents

Abstract

The invention relates to the field of land reclamation and can be used in the development of saline lands. The purpose of the invention is to reduce the volume of land works and accelerate the input of land into agricultural use. At the site of washing the shafts 4 pour out when planning. The shafts 4 are placed above the drains 1. Before washing the checks with water supply to the furrows 9 on the ridge 1 1 of the shaft 4, the soil of the shaft 4 and the backfilling 5 of the drain 1 are wound. When dumping the shafts 4, in the places of cutting at the base of the shaft 4, the soil is left, and on the adjacent strips 7 it is cut to a depth, more than design. When dumping the shaft 4 in the place of filling, the required amount of ground planning shaft 4 is poured into the shaft 4. When washing the soil of checks, the soil of the shaft 4 is desalinated due to filtration of water along them below the depression curves. Unwashed vol. M soil on the ridge 11 of the shaft 4 is placed during leveling the shaft on the adjacent strip 7 and covered with washed soil of the middle part 12 of the shaft. 1 hp f-ly, 4 ill. About SP OS GCE with O5 CL

Description

Q} L / 2.Z

The invention relates to land reclamation and can be used in the development of saline lands.

The purpose of the invention is to reduce the volume of land works and accelerate the input of land into agricultural use.

FIG. 1 shows a fragment of the plan of the area under development in fig. 2 is a cross-section of the longitudinal shaft in place of cutting the soil; in fig. 3 - the same, in places of a mound of soil; in fig. 4 is a shaft leveling scheme.

The method of washing saline lands is carried out as follows.

In the area under development with saline soils, horizontal drainage and irrigation network 2 are arranged for closures. Then, the site is planned and, at the same time, filling the transverse 3 and longitudinal shafts 4 breaks it into checks. At the same time, the longitudinal shafts 4 are poured directly above the drains 1, and the transverse 3 - parallel to the horizontal m.

8, the process of forming} and the longitudinal shafts 4, due to the movement of the earth-moving equipment (bulldozers, scrapers) and the pressure of the shafts 4, causes the primary compaction of the backfill soil 5 above the drains 1. With the shaft 4 at its base, an unplanned ground surface 6 is left and adjacent to it strips 7, the soil is removed to the mark below the design 8. With the device shaft 4 at the place of embankment, the required amount of planning soil is poured into shaft 4, and on the adjacent strips 7 the soil is not laid or laid for an hour tichno On strips 7, the soil to the design surface 8 is poured from the shaft 4 while leveling it after washing the checks.

At the end of the site planning and dumping of all the shafts on the ridges of the longitudinal shafts 4, the grooves 9 are made with the help of a furrow divider and water is fed into them to block the ground of the shafts 4 and backfill 5. No furrows are made on the ridges of the transverse shafts.

Due to the filtration of water from the furrow

9 on the crest of the shaft 4 in the drain 1, the soil of the shaft 4 and the backfill 5 of the drain are compacted and a stable gravel filter 10 is formed at a higher water filtration rate at the water intake holes of the drainage pipeline 1.

In areas of poor laying of drainage pipeline I or absence of gravel-sandy dusting around it, when soil shaft locks 4 and backfill 5, shaft subsidence 4 may be observed. If they are detected, the water supply to the furrow 9 is stopped and the drain is repaired under favorable conditions , with watertight checks.

o

five

0

five

0

five

0

five

0

Simultaneously with the locking of the longitudinal shafts 4 and the backfill of 5 drains 1, deep soil loosening of the soils is carried out in checks. It is recommended to run at a depth of 0.8–1.2 m at 50% of the water level, and in the middle of the interstitials, perpendicular to the drains. On the streaks 7, the soil is compacted by the movement of the earthmoving equipment during the dumping of the shafts 4 and loosening the middle lane between the walls. As a result, the rate of water infiltration decreases on the adjacent lanes up to one-quarter of the distance between the drains. As a result, the profile of the rate of filtration of water at the interdirection is leveled and the quality of washing of the soil over the entire check area improves.

At the end of the shaft locking 4 and loosening the soil in checks, stop the flow of water to the grooves 9 on the longitudinal shafts 4, fill in the checks and conduct the washing of the soil grounds, ensuring the flow of the entire design leaching rate. When washing the soil of checks, a desalination of the soil of the shafts 3, 4 occurs due to the filtration of water along them below the depression curves formed between the water levels of a number of checks located or between the water levels in the drains I. washed with a small (no more than 0% 9 soil group of trees 4, located on their ridge x 11 above the depression curve.

8-10 days before the end of the check flushing, water supply to the furrows 9 on the longitudinal shafts 4 is resumed to wash the soil in the middle part 12 of their section below the furrows where salts accumulate for the second time during washing of the checks.

After the water supply is cut off, the level of groundwater is expected to decrease; ia the area to the required depth and the drying of the ground to the state when it is possible to resume the earthworks1,1. Then, the rolls 3, 4 are leveled. First, with each shaft 3, 4, the strips 7 are poured with an evenly thin layer of unwashed soil from the ridge I of the shaft, which is above the depression curve, which is then covered with a layer of washed soil from its middle part 12. Subsequently, well-known agrotechnical measures are carried out.

Claims (2)

Invention Formula A method of flushing saline lands, including a closed drainage network, splitting a plot into checks by dumping transverse and longitudinal shafts on it, forming furrows on the ridges of the latter and supplying water to them, flushing the soil of checks and longitudinal shafts and leveling the shafts, characterized by , in order to reduce the volume of earthworks and speed up the entry of land into agricultural circulation, check shafts are poured when leveling the area with the installation of longitudinal shafts above drains; those cuttings of the soil in the middle part of the planning section, on which the shaft is arranged, the soil is left, and on two adjacent bands, cut to a depth greater than the design, in the place of embankment on the planning area, on which the shaft is arranged, the required volume Layer soil is poured into the shaft, after which, before washing the checks, feeding water into the grooves on the ridges of the longitudinal shafts, they simultaneously lock the soil and backfill drains, and wash the longitudinal shafts at the final stage of washing the checks. 2. A method according to claim 1, characterized in that, when leveling the shaft into adjacent strips of the planning area, first pour out the unwashed soil of the shaft ridge, which is then covered with washed out soil from its lower part. of .g. / 77 JZ 9 4 i) ig.z Compiled by I. Selt Metov Tehred I. VeresKorrektor V. Butt ha Circulation 606 Subscription VMIIP11 of the USSR State Committee on Inventions and Discoveries 1 13035, Moscow, F - 35, PayujcKasi, nab., D. 4/5 GO: in) () - n () LI | -ra (|) icheck () e enterprise, Uzhgorod, ul. Design. four