SU1395749A1 - Method of colnstructing horizontal drainage - Google Patents

Abstract

The invention relates to land improvement,: The purpose of the invention is to increase the efficiency of drainage. Along the walls of trench 2, vertical wells 6 are formed. Wells 6 are drilled without drilling by hydrating the hydromonitor (GM) 7. GM 7 is lowered into well 6 and water is pumped into it which flows from the side nozzles in the form of jets 8, for example water or water-air. The jets 8 are directed along or across the walls of the trench 2, displacing the GM 7 from the bottom to the top without turning or simultaneously turning it around its longitudinal axis. Jets 8 are smudged in the soil and drainage backfill cavity 9J. Small clogging particles emerge onto the surface in the form of pulp through the borehole 6, in which GM 7 is located. drainage backfill, which provides an increase in drainage water absorption capacity. 5 il. Iw

Description

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The invention relates to the drainage of land in land reclamation construction, in particular, to methods for constructing closed horizontal drainage.

The purpose of the invention is to increase the efficiency of drainage.

Pa figs. 1 given a drainage plan when eroding along the walls of the trench; in fig. 2 - the same, when eroding across the drainage in FIG. 3 - the same, when washing out with turns of the jet, in FIG. 4 - the same, at the beginning of erosion, a cross-section; in fig. 5 - the same, in the process of erosion. : The method is carried out in the following way.

I In the ground 1, mainly bypass, unstable, they tear off the trench; 2 with vertical walls. The passage of trench 2 is carried out when it is filled with glycerine, with a solution that ensures the stability of the walls of the trench. The clay solution forms on the walls and bottom of the trench an annular layer 3, which includes a clay crust and an adjacent layer of soil, which is penetrated with a clay solution. In the trench 2, the drainage pipes 4 are installed: and the drainage granulated ma- terterl 5 is lined up; the latter, in the process of rolling in the trench 2, can be mixed with the clay solution.

Along the walls of trench 2, either outside or not, they form vertical wells 6 with a depth exceeding the depth of trench 1, Boreholes 6 are drilled, without casing, for example, under Ipac-TBOpoM clay, or by hydraulic immersion of the Hydromonitor 7. supply of water pipes, a. may also have con

Near trench 2, at a distance of 0.5 m from one of its walls, hydromonite to a depth of 5.5 m is hydraulically immersed. Hydraulic monitor 7 is made up of two concentric pipes with a diameter of 50 and 76 mm, in the bottom part has a body with two side air nozzles, located at an angle of 60 to each other. The lateral nozzles have a diameter of 5 mm; the air nozzles centered with them have an annular gap of 3 mm. The monitor piping pipes are connected to the pump pump, respectively.

centric water annular side nozzles and a supply of pipes for supplying compressed air. Hydraulic monitor 7 45 is lowered into the borehole 6, water is supplied to it under pressure, which flows from the side nozzles in the form of jets, for example, water or water-air jets 8 are directed along or across 6 m / min, with a pressure of 0.7 MPa. the walls of the trench 2, moving the monitor 7 from the bottom up without turns or at the same time turning it around the longitudinal axis. In order to increase the range of action of the jets 8, compressed air can be supplied at the same time with water through the jet monitor 7.

The jet 8 is crushed in the soil and drainage backfill cavity 9, while

water supply 18, pressure

6 MPa and compressor lead

The hydromonitor is immersed by means of an auxiliary pipe 50 mm in diameter with an end nozzle connected to the pipes of the monitor 7 on the side. After hydro immersing a depth of 5.5 m, water switches off the water nozzles and starts supplying compressed air. Simultaneously lead n

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five

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50

five

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small clogging particles are transported to the surface in the form of pulp through the borehole 6, in which the jetting device 7 is located. Large particles of soil and drainage backfill settle in cavity 9. Thus, the soil of the peeled soil 3 and drainage backfill 5 occurs, which provides increase in water-grip drainage.

These operations can be carried out immediately after filling in the trench 2 of the drainage material 5, and repeatedly as needed in the subsequent period of drainage operation.

Example. Horizontal drainage of a closed type is laid in saturated sandy soil to a depth of 5 m. The trench 2 with a width of 1 m with vertical shades is cut off with an excavator, and the trench is filled with a clay mortar during sinking. A drainage pipe 4, made of a polyethylene pipe with a diameter of 315 mm with a slit perforation, is placed in a trench under the mud solution. Backfilling into trench

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a gravel mix with a layer height / m, a local sandy ground is filled over it, the clay solution is forced out of the trench.

Near the trench 2, at a distance of 0.5 m from one of its walls, the hydromonitor 7 is hydraulically immersed to a depth of 5.5 m. The hydromonitor 7 is made of two concentric tubes with a diameter of 50 and 76 mm, in the lower part It has a housing with two side water-air nozzles arranged at an angle of 60 to each other. The lateral water nozzles have a diameter of 5 mm, the concentric air nozzles with them have an annular gap of 3 mm. The monitor feed pipes are connected by hoses, respectively, to a pump with an output of 6 m / min and a pressure of 0.7 MPa.

. By 6 m / min, pressure 0.7 MPa.

water supply 18, pressure

6 MPa and a compressor with a flow rate of 6 m / min, a pressure of 0.7 MPa.

Hydraulic monitor 7 is hydraulically driven by an auxiliary pipe 50 mm in diameter with an end-nozzle attached laterally to the tubes of hydraulic monitor 7. After hydro-immersion to a depth of 5.5 m, water is switched to the side nozzles and the compressed air supply is started. At the same time lead the rise of the monitor 7 at a speed of 0.5 m / min and turns it around the longitudinal axis at an angle of 30-40 °.

Water-air jets 8 from the side nozzles of the jetting machine 7 flow out at a speed of about 100 l / s and spread rpyHj up to 3-4 m. At the same time, a spout of pulp containing clay and other small particles of soil occurs from the well in which the jetting device 7 is moved . Large particles of soil and gravel, washed from fines, are deposited in a cavity that is eroded in the soil.

The rise of the monitor 7 is conducted to a height of 2.5 m from its lower position, the wire is flushed within the layer of drainage bed. Then stop

ke, at a distance of 5–7 m from the previous one along the trench wall.

Claims (1)

Invention Formula A method of building horizontal drainage, including a passage of a trench when it is filled with a clay mortar, laying of drainage pipes, removing clogging particles from the walls, and laying down a filtering material, characterized in that drainage, parallel to the axis of the trench, vertical wells are made, and the clogging particles are stressed after filling the filter material into the trench by washing supply of water and air, extract guide-20 by means of moving in wells 7 of the well and repeat the described operations at the following point 7 b bottom-up sources of water or water-air jets. (fiue.1 (flUf.