RU2287043C2 - Horizontal highly-permeable drainage filter - Google Patents

Abstract

FIELD: hydraulic, waterwork and reclamation building to form horizontal drainage and radial underground water intake systems.

SUBSTANCE: filter is composed of a number of rings. The rings include trapezoid members put on rods so that gaps and vertical slots are created. The gaps expand in filter interior and equal to average gravel-sand filler particle dimensions. Vertical slots are adapted for water ingress. The rings are pulled together and define units connected with each other.

EFFECT: increased filter permeability.

5 dwg

Description

The invention relates to the field of hydraulic engineering, water management, reclamation construction for the equipment of horizontal tubular drainages, radial groundwater intakes.

There are known designs of horizontal drains for the equipment of head, coastal, intercepting, shut-off tubular drains [1, p. 104]. The filter part of the drainage is made of pipes of various materials with holes (round, slotted), with gaps at their joints [1, p. 218], of porous pipes (concrete pipe filters). The filter duty is 1-5% [3, p. 95]. Filters are sprinkled with sand and gravel in one, two or three layers with a thickness of 100-150 mm or wrapped with non-woven materials [4]. In most countries, the installation of horizontal tubular drains is regulated by the norms (in Germany, DIN 1185, Technical specifications ASTM C412-58T, in Russia - SNiP 2.06.15-85, OST 33-10-73, etc.). Horizontal tubular drainage is widely used all over the world in the practice of water management, hydraulic engineering, agricultural, reclamation construction.

The closest analogue of the invention is a horizontal tube drainage filter [1, p. 37]. The disadvantages of the design of the filter (hereinafter the prototype) should include its low duty cycle (on average about 3%). According to numerous studies in various environmental conditions, it was found that the filter duty factor determines the long-term and stable operation of horizontal tubular drains in time [2, p. 223].

The technical result of the invention is the development of a filter design horizontal increased permeability.

This technical result is achieved by the fact that the tubular drainage filter is made of trapezoidal shaped rings with adjustable holes expanding inward, with gaps between them equal to the average particle diameter of the adjacent layer of the contour of sand and gravel sprinkling, while vertical slots between the rings serve as a water-receiving surface. Rings of complex shape are assembled on round rods (with a diameter of 4 to 12 mm, depending on the diameter of the drainage) of various materials (fiberglass, basalt plastic, round steel reinforcement ...) with 3-5 mm links. With an outer diameter of 10 mm and the width of the gaps between them 10 mm, the filter duty of the horizontal tubular drainage filter will be 50%.

The invention is illustrated by drawings.

Figure 1 shows the filter link horizontal increased duty cycle, where

1 - stacked ring; 2 - flanges; 3 - connecting pipe; 4 - connecting rod; 5 - adjusting nuts.

Figure 2, 3, 4 and 5 shows a stacked ring and its individual sections, where 6 is a pin for adjusting the gaps between the stacked rings; 7 - stiffness pin; 8 - protrusion of rigidity.

The proposed device differs from the known ones by a greater duty cycle, which significantly reduces hydraulic losses on the filter, increases the life of the drainage, and reduces operating costs.

After a set of rings on the connecting rods and their pull-ups in the link, the links are interconnected (coupling joints, flanged, socket “only”) and laid on a previously prepared layer of sand and gravel sprinkling.

The filter works horizontal drainage increased permeability as follows.

After laying the filter links of the horizontal tubular drainage on the prepared base of the inverse filter, connecting them and connecting to the water intake well, they begin to equip the sand-gravel filter of the upper part of the drainage, and subsequently backfill it. If construction was carried out with a temporary decrease in groundwater, then after installing a horizontal tubular drainage, the water reduction is turned off and the drainage is put into operation. Drainage water enters the filter through the dusting circuit and vertical slots between the filter rings and is diverted to the water inlet by gravity.

A horizontal drainage filter of increased permeability, characterized in that it is made of prefabricated rings of trapezoidal shapes with adjustable gaps between them, expanding inward and equal to the average particle diameter of the layer of the adjacent contour of the gravel pack dusting, with vertical slots between the rings being the water-receiving surface.

Information sources

1. Forecasts of flooding and calculation of drainage systems in built-up and built-up areas. Reference manual to SNiP. M., Stroyizdat, 1991, p. 272.

2. R. Eggelsmann. Drainage guide. M., Kolos, 1978, p. 255.

3. M.N. Graziansky. Land reclamation engineering. M., Publishing house of building literature, 1965, p. 262.

4. OST 33-10-73. Drainage filters made of artificial mineral fibrous materials. Technical requirements. M., Ministry of Water Economy of the USSR, 1973.

Claims (1)

Horizontal drainage filter of increased permeability, characterized in that it is made of prefabricated rings assembled from trapezoidal shapes on rods with gaps widened inward and equal to the average particle diameter of sand and gravel sprinkling, and vertical slots between the rings used for water intake, while the rings pulled into links that are interconnected.

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