RU2710162C1 - Protective-filtering material for closed horizontal drainage - Google Patents

Abstract

FIELD: land reclamation.

SUBSTANCE: invention relates to drainage reclamation, in particular, to drainage with closed tubular drainage, and can be used for protection of drain pipes from siltation. Protective-filtering material 2 for closed horizontal drain 1 is a fibrous material of perchlorovinyl resin, having a two-layer structure (with total thickness of 3.5 mm) with diameter of fibers in first layer of 5–10 nm and in second layer of 100–300 nm and distance between fibers of not less than 15 % of average size of soil particles, which is overlapped over drain tube 1 and is subjected to circular dusting with gravel 3 with fraction of 2.5–10 mm.

EFFECT: invention increases water-receiving capacity of drains by increasing longitudinal water-passage capacity, simplifies the technology of laying protective-filtering material as a result of moldability around the protected drain, as well as longer service life of irrigation system as a whole.

1 cl, 1 dwg

Description

The invention relates to drainage reclamation, in particular to drainage by closed tubular drainage, and can be used to protect drainage pipes from siltation.

Known roll protective filtering material (SU No. 633555, 11/26/1978) for closed drainage, including a peat layer bonded together and a permeable tape. The peat layer is made in the form of individual briquettes in the form of truncated pyramids, attached by bases to the ribbon on both sides.

The disadvantages of this material is that the technology of its manufacture is laborious and technologically complex, and peat is taken only certain types.

Known protective filtering material (SU No. 651831, 03/15/1979), including water-permeable coating layers and a filtering filler, while the coating layer is made in the form of longitudinal sections in which the filtering filler is placed, forming water-conducting channels between each other.

The disadvantages of this material is that the process of its manufacture is labor-intensive and material-intensive; low wear resistance of the filter layer.

Known roll protective filtering material (SU No. 1041626, 09/15/1983) for closed drainage, including a filtering material tape, which is made of several layers of reinforced pressed milling machine, fastened together by firmware along the edges of the tape, and the reinforcing material is made in the form of short polymer threads evenly spaced in the layers of milling machine.

The disadvantages of this material is that when water enters the trench, peat briquettes are destroyed; limited flexibility of the material as a whole is observed.

The closest analogue to the claimed technical solution is protective filtering materials made of fibrous-porous materials made by pneumatic extrusion of polyolefin fibers as a water-receiving layer of drainage pipes (V. Smetanin. Studies of the operation of a water-receiving layer of drainage pipes from fiber-porous polymeric materials / V.I. Smetanin, V.I. Khokhlov // Environmental Engineering. - 2012. - No. 5. - P. 17-22), which according to the “TTK. Installation of a drainage system using Typar Geotextiles ”is laid on the bottom and walls of the ditch so that its edges extend to the ground in sufficient quantity to overlap the ditch with an overlap on top. The ditch itself is filled with any coarse-grained, well-permeable material, which can be coarse sand, gravel, gravel, expanded clay, etc. From above, everything is closed with the left ends of the canvases and covered with suitable soil.

The disadvantage of this material is that these materials can be used in non-suffusion soils, which is explained by the heterogeneity of non-woven materials.

The objective of the invention is to improve the hydraulic and technical characteristics of drainage systems through the use of protective filtering material for closed horizontal drainage.

The technical result of the invention is the creation of an effective protective and filtering material, which is made of fibrous material from perchlorovinyl resin and overlapped on top of a drainage pipe with further circular sprinkling of the prepared drainage pipe with gravel.

The technical result of the invention is achieved through the use of protective filtering material for closed horizontal drainage, which is a fibrous material made of perchlorovinyl resin having a two-layer structure (with a total thickness of 3.5 mm) with a fiber diameter of 5-10 nm in the first layer and in the second 100-300 nm and a distance between the fibers of at least 15% of the average particle size of the soil, which is overlapped over the drainage pipe and is subjected to circular gravel coating with a fraction of 2.5-10.0 mm.

In FIG. 1 shows the design of the water intake part of the drains with a protective filtering material.

A protective filtering material (2) is lapped onto the drainage pipe (1), which performs the function of a permeable and filtering layer, which, in turn, is subjected to circular gravel coating with a fraction of 2.5-10 mm (3), which allows primary water filtration. After which the trench is backfilled with excavated soil.

Implementation of the proposed technical solution will increase the drainage capacity of drains by increasing the longitudinal throughput; to simplify the technology of laying protective filtering material as a result of formability around the protected drain; increase the life of the irrigation system as a whole.

Claims (1)

Protective filter material for closed horizontal drainage, including permeable cover and filter layers, characterized in that it is a fibrous material made of perchlorovinyl resin having a two-layer structure with a total thickness of 3.5 mm, with a fiber diameter of 5-10 nm in the first layer and in the second 100-300 nm and the distance between the fibers is not less than 15% of the average particle size of the soil, which is overlapped over the drainage pipe and subjected to circular gravel coating with a fraction of 2.5-10.0 mm.

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