RU1772316C - Method for construction of drain in water-bearing ground - Google Patents

Abstract

Using; The invention relates to land reclamation construction and can be used in the construction of a drainage or collector network in water-saturated soils. The essence of the invention: the construction of drainage is carried out by developing a trench 2 with simultaneous freezing of its side walls along the entire length, and the soil is frozen from the bottom of the trench to the height of the outflow of groundwater 3. A drainage pipe 5 is laid in a trench with temporarily frozen walls, sprinkled around volumetric filtering material 6 and load on top of the soil 7 backfill. 4 silt

Description

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The invention relates to land reclamation construction and can be used in the construction of a collector or drainage network in water-saturated soils.

The purpose of the invention is to reduce the scope of work and. improving the quality of construction of drainage in water-saturated soils,

In FIG. 1 shows the development of a drainage trench in water-saturated soils by a draenerator; in FIG. Figure 2 shows a section of a trench after fragmenting and freezing its walls to a height of pinch out of groundwater; in FIG. 3 - drainage device in a trench with walls frozen in height; in FIG. 4 is a cross-section of a trench with a finally laid drain, after stabilization of the adjacent soil zone and triggering of the groundwater level. The method of building drainage in water-saturated soils is as follows

Trails are prepared for the movement and operation of the drainage stacker, while cutting the vegetation layer and removing foreign bodies - stones, etc. A drainage cladding machine is adjusted and installed to the collector, the working body 1 is lowered. Knowing the actual position of the groundwater level in the drainage construction sites, simultaneously with the trench 2 fragment, its side walls (right-left) along the height of the groundwater pinch out 3 are subjected to freezing with layer A of the required thickness. The process of excavating the soil during the preparation of the trench and freezing its walls to the required thickness is carried out simultaneously, by a continuous process, at a speed equal to the speed of the trench digging. It is known that the moisture content of the soil along the depth of the trench is not the same, at the bottom (at the bottom) it is high, and at the top - less. This is clearly expressed in sections - in floodplain conditions and on irrigated lands. The bottom of the trench is subjected to freezing only in the border zones to the walls of the trench. Then drainage pipes 5 and volumetric filtering material 6 are sprinkled and laid to the bottom, sprinkling circular round pipes to them, Filtering material b expires through the bunker device of the drainage stacking machine (Fig. 1), Stacked pipes 5 and filtering material 6 are sprinkled with developed mineral soil 7 (Fig. 3 )

The process of freezing the side walls of the trench is carried out using cooling chambers 8 mounted on the working equipment of the drainer

(Figs. 1, 2), at the same time, the fragments of the trench and soil freezing are the same. According to their design, the cooling chambers 8 are made in the form of divided, two-row structures, on the earth moving tool and on the front of the pipe-hopper in the form of multi-element evaporators for adjusting the height of the freezing process

10 soils. Freezing can be carried out depending on the position of the groundwater level, water saturation of the soil, in two stages - preliminary and final. A method of constructing drainage in water-saturated soils is implemented using modern drainage-laying machines such as UDM-350, DU-3502, or 6027 Haikons. When using the UDM-350 narrow-trench drainage stacker with refrigeration-compressor equipment installed on it, Freon-12 is used as a refrigerant in the circulation system.

Initially, the drain stacker is installed at the collector and the insert of the working body 1 is inserted to a predetermined depth. After the passage of the drain from the collector 1-2 m f include side evaporators (on the hopper, or on the working body, if necessary

30 together) made in the form of flat cooling chambers and freeze the side walls of the trench to the height of wedging out 1 groundwater. The depth of the frozen soil layer is 10-40 mm. In bun35 ker-pipe-layer of a drainage-laying machine, a drainage pipe is fed and a volumetric filter material (OFM) flowing out to the bottom of the trench is loaded by means of a side loader. In the bottom part of the OFM bunker, a divider flows around and sprinkles a drainage pipe on both sides, an underfill is formed under the pipe, and an OPM backfill is formed on the sides and above.

The layer of soil frozen on the walls of the trans45 neck temporarily inhibits the intense inflow of groundwater into the drain — through the filtering bed and into the pipe, for the period of their laying in the trench, which ensures the quality of the drainage structure in water-saturated soils, preventing

50 filtering from soil pulp. Pipes laid in a trench with OFM are sprinkled (loaded) with developed mineral soil (Fig. 3). Then, with full backfilling, the remaining developed mineral soil is fed into the trench with a bul55 doser (digger), it is rolled up with caterpillars (longitudinal strokes of the bulldozer along the trench) and produced

Reclamation - covering the route with a vegetative layer of soil previously cut, as well as surface planning.

The inventive method for constructing drainage in water-saturated soils, including freezing soil along the drainage route, developing a trench, supplying and laying drainage pipes and filter material, and

Thebes. I

backfilling the trench with soil, characterized in that, in order to reduce the amount of work and improve the quality of construction, the soil is frozen at the same time as the trench is developed, and the freezing is carried out along the walls of the trench to the height of the groundwater pinch out.

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