SU1497349A1 - Method of drying heavy soils with aid of enclosed drainage system - Google Patents

Abstract

The invention relates to land reclamation, in particular, to methods of drainage of land by closed drainage for agricultural and other purposes. The purpose of the invention is to increase the efficiency of drainage on heavy soils by increasing the water permeability of the trench backfill soil. The drainage trench is opened, drains are laid on its bottom, they are covered with protective filter material. The trench is covered with soil removed from it. The soil of the trench bed is evenly mixed with the wood chips obtained by grinding vegetation growing directly in the area to be reclaimed. The content of chips is 2-4% of the mass of the soil, depending on its mineralogical composition. The wood chips are soaked with a 30% bischofite aqueous solution before mixing with the soil. 2 hp f-ly, 1 tab.

Description

The invention relates to land reclamation, in particular, land drainage methods using closed drainage for agricultural and other purposes.

The purpose of the invention is to increase the efficiency of drainage on heavy soils by increasing the permeability of the backfill soil.

The proposed method of land drainage by closed drainage on heavy soils (with a filtration coefficient of less than 0.1-0.2 m / day) is implemented as follows.

A trench is torn off in the ground and drains are laid on its bottom, for example by means of an excavator-excavator. The excavated soil is placed on the edge of the trench in the form of a heap. Drains are covered with protective filter material, such as fiberglass, sawdust or peat. Then, using a trenching machine, for example, of the screw type, equipped with a wood chip hopper, the trench is backfilled with soil from the heap with simultaneous uniform dosed feeding and moving of wood chips treated with bischofite in an amount of not more than 4% of the soil mass, depending on its mineral composition. .

The table below shows the weight ratios of chips and soil depending on the type of soil (for heavy soils, clay and loam).

As a result of uniform soil mixing with chips in the soil of the trench backfill, intrastructural through pores are formed, which allow water to transit from the surface of the soil to the drains.

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Claims (3)

1. A method for draining heavy soils with closed drainage, including the development of a trench, laying a drainage pipe on its bottom, lining it with a protective filtering material and filling a trench with excavated soil, in order to increase the drainage efficiency by increasing the water penetration rate evenly in the spring wood chips soaked with bischofite rum. 2. The method according to claim 1, I distinguish that the content of chips in backfill is no more than 4 soils. 3. Method according to paragraphs. 1 and 2, from the fact that wood chips n the bottom of the backfill soil, the excavated soil before the 30% solution of bishofit. backfilling is uniformly mixed with wood chips impregnated with an aqueous solution of bischofite. 2. A method according to claim 1, characterized in that the content of chips in the total backfill volume is no more than 4% by weight of the soil. 3. Method according to paragraphs. 1 and 2, characterized in that the wood chips are impregnated 30% solution of bishofit. Weight ratios of chips and soil for different soils Soil type Clay The weight ratio of chips and soil is 4% 3.5% 3% 2.5% m (1:25) (1:30) (1:35) (1:40) Medium loam Light loam