SU1661299A1 - Method of constructing closed horizontal drain - Google Patents

Abstract

The invention relates to the drainage of land and m. used in the construction of closed horizontal drainage on reclaimed land. The goal is to improve the quality of drainage construction. The method is carried out as follows. Around the drainage pipeline (TP) is placed a closed-loop sheath of tape material. As the last one, a shell closed along the contour is used, for example, by stitching the edges of the litter and covering two-layer bags, folded from filter sheets and a grid in the form of tapes. Then, the shell closed along the contour is compressed by drive rollers around the TP before it is wound on the cassette (K) and secured with intersecting threads with a tension lower than their tensile strength. The drainage TP prepared for laying with a crimped shell around it is wound on K, which is transported to the construction route of the drain and installed on the trenchless plowing layer. Closed horizontal drains begin to stack from at mk and lead up the slope. Further, when moving the granulator, its working body forms a vertical slot with sidewalls adjacent to it. The drainage TP, with the shell crimped around it, is wound with K and laid on the bottom of the slit formed by the vertical knife. The placement of the shell ends in the sidewalls is carried out by supplying compressed air to the TP from the side of the bag. 5 il.

Description

The invention relates to the implementation of land and can be used in the construction of closed horizontal drainage on reclaimed land using trenchless draining machines.

The purpose of the invention is to improve the quality of the construction of drainage.

FIG. 1 shows the formation of a vertical slit with sidewalls and the laying of a pipeline with filtering tape material with the help of a trenchless trench-draining machine worker, side view; in fig. 2 shows section A-A in FIG. one; in fig. 3 section bb in fig. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 is a section of YYD in FIG. one.

The method of construction of a closed horizontal drain is carried out as follows.

Around the drainage pipe 1 place a closed along the contour of the shell 2 tape material, formed, for example, by stitching the edges of the litter and covering two-layer bags, folded from filter sheets and mesh in the form of tapes. Then closed along the contour of the shell 2 is compressed drive rollers around

ON OK

TO

yu yu

the pipeline 1 before winding it on the cassette and fastened with intersecting threads with a tension lower than their tensile strength,

The drainage piping 1 prepared for laying, with the casing 2 compressed around it, is wound on a cassette that is transported to the construction route of the drain and installed on a trenchless sloper.

The working body of the trenchless draining stacker contains a vertical knife 3 with a pipe layer 4 and a two-console horizontal knife 5 with a downwardly inclined front cutting edge 6.

Vertical 3 and horizontal 5 knives are made with channels 7 for the discharge of air through them into the atmosphere.

The height of the cavity 8 between the upper 9 and lower 10 plates of the horizontal knife 5 is chosen equal to the largest outer diameter of the drainage pipeline 1 with the sheath 2 crimped around it. The width in terms of the two-console horizontal knife 5 is determined by the condition of the water guide element - the shell 2 of the required width.

A closed horizontal drain starts to be laid from at 11 mm (open collector or from a hole on a closed collector) and lead, for example, up the clone. The wellhead section 12 of the pipeline 1 with a length of up to 20 mm is laid from corrugated pipes without water intakes and a filter. Immediately after laying the section 12 of the pipeline, the gap in the ground above it is closed by rolling with tracks with a gatch. Then in the drainage pipe 1 through its mouth 13 is placed a movable resistance in the form of a cylindrical rolling pin 14 with a narrowed front end and the cuff 15 at the rear end. A bush 13 of the pipeline 1 by means of an adapter 16 connects a hose 17 for supplying compressed air from a compressor (not shown),

When moving the plow maker, its working body forms a vertical slot with sidewalls adjacent to it. The drain pipe 1 with the shell 2 crimped around it is unrolled from the cassette and placed on the bottom of the slot formed by the vertical knife 3. In the process of laying the pipe 1, compressed air is continuously injected from the wellhead section 12 into it. The pressure of compressed air exceeds the hydrostatic pressure of groundwater on the laid drain; therefore, the air flows out of the pipeline 1 through its water inlets and seeps

through the pores of the shell 2 into the surrounding soil.

At the same time, compressed air presses from the inside onto the sheath 2 of tape material

pressure proportional to the ratio of the areas in the light of the fibers and pores of the filter material of the shell. On the laid part of the drainage pipe 1, this pressure presses the casing 2 in the form of a water element of the drainage guide element to the surrounding soil, and on its section inside the cavity 8 is perceived as threads wrapping the compressed casing 2 on the drainage pipe 1. This force is picked up by the thread and increases its tensile strength, beyond tensile strength. The thread breaks and releases the corresponding area of the sheath 2. The latter is loosely located on the stretched drain pipe 1 and inflates within the cavity 8 of the horizontal knife 5 to tension the sheath 2. Pass through the pores of the filter sheath 2 into the cavity 8 of the horizontal knife 5, air

5 then enters channel 7 and is vented to atmosphere.

The leakage of compressed air through the drain pipe 1 to the side of the donor machine prevents the movable resistance in it in the form of a rolling pin 14, which moves in the pipe 1 under air pressure at a straight line inside the horizontal knife 5. The length of the rolling pin 14 is chosen from the condition

5 so that it is wedged in the pipe on the curvilinear section of the pipelayer 4. And its cuff 15 is located directly at the transition point of the pipelayer 4 into the cavity 8. At the exit of the cavity 8 is inflated

0 filter sheath 2 falls into the sidewalls formed by a horizontal knife 5. Immediately after the passage of the knife 5, the excavation is filled up in its middle part with soil, which is cut by the filling device 18, and in the end

5 parts - ground under the weight, previously raised knife 5. Under the pressure of this soil, exceeding the air pressure inside the filter casing 2, the latter flattens and forms a water guide element of the drain in the form of a flattened filter with a finely porous filtering surface and a large-pore water supply a thick middle layer of two coarse meshes.

5 Due to the fact that compressed air flows out of the entire length of the laid drainage pipe 1, squash the water conducting element into the surrounding soil, it does not allow ground water and loose soil particles to enter this element. Compressed air displaces water from the large pores of the soil, but does not relieve its pressure on the water guide element. Under the action of this pressure, the filter coating is compacted in a clean (non-mineralized) state and acquires an invariable working porous structure. The most intense outflow of air from the drainage pipeline 1 occurs at the site of its installation and backfilling with loose soil directly behind the bed draining machine, since it is in this area that the drain filter is usually clogged due to the pulp coming from it.

After the drainage has been laid, the rolling pin 14, under air pressure, moves into the empty pipe layer 4 and, together with the blades 3 and 5, rises to the surface of the earth. The compressed air supply is stopped and the initial well (not shown) is mounted in the usual way above the source end of the drain.

After the termination of the air supply to the drainage pipeline 1, simultaneously, the ground water begins to flow from the water-bearing ground over the entire surface of the water guiding element (flattened filter). Its filtration now occurs at low speeds through consolidated soil. Filter throughout its

the area remains clean.

Claims (1)

The invention of the method of construction of a closed horizontal drain, which consists in winding the drainage pipe on a cassette, formation of a seal and a vertical slit with sidewalls adjacent to it, laying of the pipeline and covering its filtering tape material to the bottom of the vertical slit and placing tape material in the sidewalls, characterized in that, in order to improve the quality of drainage construction, and as a tape material closed along the contour of the shell, which is compressed around the pipeline before it is wound on the cassette, while laying the latter and the shell are made together with one cassette, and the placement AEC shell in the sidewalls is carried out by feeding compressed air piping U 17 eleven  L-rJZ t t. j b b tt g y 1 Fig.Z T  j 18 l g