RU2630241C1 - Method for establishing polygons of solid domestic wastes in distributed areas of multi-yellow soils - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: method of erecting solid waste landfills in permafrost areas includes trenching, excavation from a trench of fertile soil and maternal rock with the bottom of the trenches below the boundary of seasonal thawing, filling the trench with solid household waste, filling the maternal rock and fertile soil over solid household waste. Trenches are filled with solid household waste to the level of the earth's surface.

EFFECT: increasing the capacity of the landfill and reducing the area of disposal of domestic waste.

6 cl, 2 dwg

Description

The invention relates to the construction on permafrost soils of natural-technical systems for storing and storing solid household waste.

The well-known "Method for the construction of solid waste landfills on permafrost soils" (RU 2259895 [1]), including marking on the site of the trench landfill, excavation of trenches in the layer of seasonal thawing during the period of freezing, installation of layers of heat and waterproofing at the bottom of the trenches at the beginning thawing of soils, filling trenches with waste to the level of the soil surface, covering waste in trenches with layers of heat and waterproofing and repeating cycles in subsequent periods on both sides of the trench filled with waste.

The disadvantage of this method [1] is the long duration of the waste disposal cycle, which narrows the scope and lowers economic performance. In addition, the method requires laying layers of heat and waterproofing at the bottom of the trenches and on top of the stored waste, which increases the cost of landfill. In conditions of small depth of seasonal thawing, the use of the method is excluded.

Closest to the claimed technical solution is the "Method for the disposal of municipal solid waste in permafrost soils" (RU 2386490 [2]), including marking the trench, excavation from the trench into the dump of fertile soil and parent rock with the bottom of the trench below the seasonal thawing boundary, filling the trench waste to the level of the upper boundary of permafrost soils and backfilling of the stored waste first with the mother rock, then with fertile soil.

The disadvantage of this method [2] is the filling of trenches only to the level of the upper boundary of the frozen thickness, which reduces the capacity of the landfill and increases the cost of landfill.

The technical result of the invention is to increase the capacity of the landfill and reduce the area of disposal of household waste.

The technical result is achieved by the fact that the method of erecting solid waste landfills in areas of permafrost, including trenching, excavation of fertile soil and parent rock from the trench with the bottom of the trench below the seasonal thawing boundary, filling the trench with municipal solid waste, backfilling of the parent rock and fertile soil on top of municipal solid waste, characterized in that trenches are filled with municipal solid waste to the level of the earth's surface.

Around the landfill, it is possible to create a barrier from frozen ground by setting up an embankment at the end of winter on a frozen layer of seasonal thawing. The specified implementation will prevent the spread of the liquid part of the waste outside the pit.

The dimensions of the embankment should ensure that the soil base is frozen, performed at the embankment height not less than the depth of seasonal thawing and not more than the depth of seasonal freezing, and the width of the embankment at the top should be at least two values of its height

The embankment around the landfill can be dumped gradually during excavation from the trenches, primarily at the end sections of the opened trenches, which will reduce the total area occupied by the excavated soil and facilitate soil transportation.

The device is schematically shown in FIG. 1 (cross section) and FIG. 2 (plan view), where:

1 - projected embankment;

2 - slope of the embankment;

3 - fertile soil;

4 - mother breed;

5 - waste;

6 - trench;

7 - seasonal thawing boundary;

8 - ground level.

The method is as follows. First, a trench 6 is made, with the bottom of the trench below the seasonal thawing border 7. The fertile soil and mother rock, taken out during the first trench, are used to create a mound 2. In the original trench 6, waste 5 is laid to the level of the earth's surface 8, they are first filled with mother rock 4, then with fertile soil 3 to a height within the depths of seasonal thawing and seasonal freezing. Subsequent trenches for waste storage are created on both sides of the first trench. The soil removed at the same time is used for filling waste in trenches to the design height and creating the designed embankment 1.

The technical result is an increase in the capacity of the landfill and a decrease in the area of burial of household waste is achieved by increasing the height of the laying of solid household waste.

Industrial application

The method can be used for the disposal of household waste coming directly from producers without processing at waste sorting plants, which are absent in the predominant part of landfills in the zone of permafrost distribution.

Claims (6)

1. A method of erecting solid domestic waste landfills in areas of permafrost, including trenching, excavation of fertile soil and mother rock from the trench with the bottom of the trench below the seasonal thawing boundary, filling the trench with municipal solid waste, backfilling of the mother rock and fertile soil over solid household waste, characterized in that the trenches are filled with municipal solid waste to the level of the earth's surface. 2. The method according to claim 1, characterized in that around the landfill create a barrier of frozen soil by the device of the embankment at the end of winter on a frozen layer of seasonal thawing. 3. The method according to claim 2, characterized in that the height of the embankment is not less than the depth of seasonal thawing of the soil and not more than the possible depth of seasonal freezing. 4. The method according to claim 1, characterized in that the width of the embankment at the top is two times its height. 5. The method according to claim 1, characterized in that the embankment around the landfill is sprinkled gradually during excavation of trenches. 6. The method according to claim 1, characterized in that the filling of the embankment is performed primarily at the end sections of the opened trenches.

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