SU1537747A1 - Method of constructing a combination drain - Google Patents

Abstract

The invention relates to the drainage of land and can be used in the construction of closed combined drainage on reclaimed land. The purpose of the invention is to reduce the cost of construction of the combined drain. The method is implemented as follows. First, lay a closed horizontal drain collector 1 with filter sprinkling. Then, along with the collector drain, well-boosters 3 are constructed with fastening in mine directions 4. The sections of the filter columns 5 of the booster-wells 3 opposite the horizontal drain-collector 1 are made in the form of water outlet return filters 8. Perforated sections 7, 8 of the filter columns 5 during the sprinkling of filter columns with granular material and carrying out construction pumping overlap with the help of tubular tips 10. The conductive elements 13 are formed by drilling a number of auxiliary wells 14 with casing their pipes 17 in the jumpers of the soil, separating the drain-collector 1 and well-amplifiers 3. After that, casing 15 and mine directions 4 are extracted from auxiliary wells 3. From 3 auxiliary wells, 2 silt

Description

The invention relates to the drainage of land and can be used in the (Construction of closed combined drainage on reclaimed land.

The purpose of the invention is to reduce the cost of construction of the combined drain.

Figure 1 shows a combined drainage, transverse vertical section; fig - the same plan.

The method of construction of the combined drain is implemented as follows.

First, lay a closed horizontal collector drain 1 with filter sprinkling 2 of gravel-sand mixture, for example, by trenching. The sections of the drainage pipeline opposite the booster wells 3 at a length of about 1.5-2.0 m are made with an increased duty cycle up to (maximum possible) with openings in the form of transverse slots with dimensions of, for example, 2x10 mm. Then along the drainage collector 1 at a distance of 0.7 1. 0 m from it, construction is carried out

(drilling with a diameter of 00-500 mm) borehole amplifiers 3, for example, a rotary method using a 1BA15B or URB-ZAM machine tool, mounted to a depth of 1 m by shaft guides C from 530 mm diameter pipes, with installation of Filter columns 5, for example, from asbestos-cement pipes mark BT-6 and

Go, in the usual way, 2- row located auxiliary wells with a depth of 0.3-0.5 m greater than the depth of the trench of the reservoir-drain 1. The wells of 1 are of diameter 250-300 mm. In hydraulic drilling (used at groundwater levels above the level of a KolVT-9 with a diameter of 100-150 mm or from a flood of the lecturer), the drill hole is formed from ethylene pressure pipes of medium and heavy type with an outer diameter of 90-160 mm and filtering device 6 from a gravel mix with a particle size of 2-20 mm. The filter column 5 15 of each well of the amplifier 3 is made in the lower part with a water intake filter frame 7, and in the upper part - in the form of a water outlet filter 8 of the discharge pipe with a diameter of 219-237 mm and a water supply pipe with a diameter of 60 - 80 mm with a disk jumper nozzles at the lower end and a flange plug at the upper end (not shown). 8 formed wells pour granular material 15, such as gravel, to a level exceeding

Go, in the usual way, 2- row located auxiliary wells with a depth of 0.3-0.5 m more than the depth of the trench of the reservoir-drain 1. The wells of 1 are of a diameter of 250-300 mm. In hydraulic drilling (applied at groundwater levels above the level of the reservoir drain), the drill string is formed from

a casing pipe with a diameter of 219-237 mm and a water supply pipe with a diameter of 60–80 mm placed in it with a disk crosspiece with nozzles at the lower end and a flange plug at the upper end (not shown). 8 formed wells pour granular material 15, such as gravel, to a level exceeding

tive drainage collector 1. The length of the water-20 to 0.3-0.5 m top gravel-sand

the inlet filter 8 is taken to be 1.0-1.5 m. To eliminate the silting of the filter column 5, the holes in the filter column 5 are inclined at an angle with the lift in the direction to the pipe axis and not larger than the wall thickness of the pipe, for example, mm , with a duty cycle up to 5%. The upper end 9 of the filter column 5 of the well-amplifier 3 is placed, NEP-JQ example, 0.5 m below the ground surface. To enable the device to filter the filtering 6 and carry out construction pumping from the well-amplifier 3 to the water outlet filter 8, a material with contrasting color, filter columns 5 are piped — for example, with limestone

sprinkling 2 collector drains 1. Above it up to the upper end of the filter column 9, gravel-sand mixture 16 is used to fill the drain of the collector drainage pipe 1 to dusting 25 of the drainage pipe 1. At the same time, the fixture is removed from the bore holes (casing 17). Then, around the well-amplifier 3, at a depth of 0, 6 is removed, the mine direction is taken kt. The tube heads 10 are removed from the filter column 5 and a cover (not shown) is installed on it, after which it is covered with soil.

chambered head 10 with sealing of the annular gap with the gland 11 in the usual way, for example, from a hemp cord or rubber ring and resting it on the ring stop 12, which is made below the water outlet filter 8 on the filter column 5.

After descending into the well 3 of the filter column 5 in the usual way and dressing it with a gravel mixture 6 to the ground surface, filter airlift (not shown) is mounted in the filter column 5 and the building is pumped out in the usual way. The subsidence of gravel filter dressing 6 during construction pumping is compensated by sprinkling it into the annular space. At the end of the construction pumping, the airlift is dismantled and the well-amplifier 3 is connected to the drain-collector 1 by means of water-conducting elements 13. The water-conducting elements 13 are drilled, for example, by screw or hydraulic

material contrasting in coloring, for example, limestone rubble, with

sprinkling 2 collector drain 1. 1. Gravel-sand mixture 16 is used to fill it up to the upper end of the filter column 9, which is used to drain drain collector drainage pipeline 1. At the same time, the fixture is removed from the bore holes 1D (casing 17). Then around the well-amplifier 3 tear off at a depth of 0, 6m, remove the mine direction kt remove the tubular tip 10 from the filter column 5 and install a cover (not shown) on it, after which it is filled with soil marked

about

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Claims (2)

1. A method of construction of a combined drain, comprising a procad of a closed horizontal drain collector with a sprinkled filter made of granular material, construction along it of vertical well amplifiers and connecting them to a closed drain collector using water-conducting elements of granular material, characterized in that in order to reduce the cost of construction of the combined drain, during the construction of well amplifiers, sections of their filter columns located opposite to the horizontal drain collector, In view of the discharge filters, which are covered with granular material and construction pumping over during the time of sprinkling with tubular tips and water-carrying elements are formed by drilling in the jumpers of the soil separating the drain-collector and enhancement wells, auxiliary wells are cased with pipes , after construction pumping, contacting the drain-collector filter and the well outlet filters casings with water conducting elements by removing casing and tubular caps from the booster wells from auxiliary wells. 2. A method according to claim 1, characterized in that the water-conducting elements are made at levels of 0.3 to 0.5 below the bottom of the drainage channel trench and above the top of its filter bed. FIG. 2