Method of erection of underground horizontal water intake of combined structure

FIELD: construction.

SUBSTANCE: invention relates to hydraulic engineering construction, namely, to water intake structures, namely, to water intake structures, and may be used for water intake from underground sources with shallow beds of underground water. The method of erection of an underground horizontal water intake of a combined structure, including a water receiving trench 1 and a water collection well 7, consists in laying of gabion mats 2 in longitudinal rows on the bottom of the water receiving trench 1 with drainage devices. Gabion mats 2 are made of light fascines and perforated pipes, laid in alternating rows and rolled into a gabion net. On top of gabion mats 2 along the trench they lay flexible mats 5, made of a drainage filler, which is made of tight rows of light fascines rolled into a geonet. In the end part of the trench there is a rigid tray 6 of rectangular cross section, the cantilever part of which with an inclination enters into a water collection well 7. Gabion mats with drainage devices are laid from the trench to the middle of the tray.

EFFECT: higher efficiency of operation of a water intake structure and reduced labour intensiveness of construction.

5 dwg

 

The invention relates to hydraulic construction, namely water intake structures used for the abstraction of water from underground sources in shallow deposits of groundwater.

Relative to the closest technical solution is the way underground horizontal intake [1, 2], including the manufacture of intake stone serenatas trenches and drainage wells. The main disadvantage of this technical solution is the low efficiency and the need of a large number of stone material.

The purpose of the invention is improving the efficiency and reducing the complexity of the construction.

This goal is achieved by the fact that the method of construction of underground horizontal intake, including intake trench and drainage well at the bottom of the water intake trench longitudinal rows of stacked gabion mattresses with drainage device, consisting of lung fashin and perforated pipes laid in alternating rows and wrapped in gabion mesh, on top of gabion mattresses along the trench is placed a flexible mattress, consisting of drainage aggregate, which is made of a dense series of light fashin wrapped in the geogrid, and in the mouth of the trench provide rigid tray rectangular cantilever portion with a slope of I is the CIO into the drainage pit, this gabion mattresses with drainage device stack from the trench until the middle of the tray.

1 shows a longitudinal section of the main site horizontal underground water; figure 2 is the same as in the plan; figure 3 is a cross section of underground horizontal intake; figure 4 - gabion mattress; figure 5 is a flexible mattress; figure 6 shows a light fashina of dry reeds.

Underground horizontal water consists of water intake trench 1, gabion mattresses 2 with drainage device, made of light fashin 3 and perforated pipes 4, stacked in layers and wrapped in gabion mesh. Top gabion mattresses 2 longitudinal rows of stacked flexible mattresses 5, made of light fashin 3, wrapped in the geogrid. In the mouth of the trench 1 is arranged in a rigid tray 6 of rectangular cross section placed on the slope of the trench with the console entry in the catchment of the well 7. For collecting water from the well 7 is arranged in the suction pipe 8.

The method of construction of underground horizontal intake is done and works as follows.

First, prepare a sufficient volume of dry and Mature cane and brought it to the place of construction of water intake. Then reed made the necessary amount of light fashin 3 of them, stacking layers with perforated pipes 4, manufacturing is poured gabion mattresses 2. From the lungs fashin 3, turning them into geogrid 4-5 pieces, and made flexible mattresses 5. Later in the aquifer ground, with a small depth of the watertable, develop water intake trench 1 required depth and width, and hole drainage sump 7. After planning the bottom of the pit under the drainage well 7, and the bottom of the trench 1 under gabion mattresses 2, a flexible mattress 5 and the rigid tray 6. The pitch of trench 1 in the direction of the well 7, providing effective admission and discharge profiltrovavshih water is 0.02...of 0.05. Then at the same time build a drainage well 7 and the rigid tray 6 made of concrete, reinforced concrete or other safe polymer material. After dialing the required strength of the materials of the well 7 and the tray 6 is placed along the trench in two solid lines gabion mattresses, so that the perforated pipe 4 (adjacent mattresses 2), respectively, included in each other by lines of slope and water flow. Thus gabion mattresses 2 mounted along the entire length of the trench 1 to the middle of the hard tray 6. Top gabion mattresses stack also longitudinal rows of flexible mattresses 5, with dense rows in two layers with ligation and attach them to the gabion mattresses 2. Gabion mattresses can have the following dimensions: 3020120 cm 3525150 cm, 4030200 cm and others. Flexible mattresses 5 make the length of 150-200 cm and the diameter is rum 20-25 cm Then on top of flexible mattresses stack corresponding to (removed from the aquifer) ground to the top of the trench with a uniform seal to its natural state. In the end in the drainage pit 7 mount the suction pipe so that the inlet pipe is positioned above the bottom 30 see After construction the area around the diversion structure plan and equip so that runoff water does not penetrate nor in trench 1, nor in the well 7.

Underground horizontal intake combined structure, constructed by the proposed method works as follows. Because the groundwater level is above and flexible gabion mattresses, water flows by gravity to a flexible mattresses 5 with good water intake properties. To gabion mattresses 2, where the water penetrates through the water intake holes in perforated drainage pipes 4, which (because of the slope) transportation and ingress of water through the hard tray 6 in the catchment of the well 7. Light Pasini 3, made from dried reeds are good draining material, which retains its properties (without decomposition) 15-20 years. After 12-15 years of age may be replaced by draining the material intake of the trench, i.e. replaced and shifted gabion 2 and a flexible mattress 5. To ensure efficiency the efficient operation of the facilities of drainage wells it is necessary to provide continuous sampling of water through the suction pipe stationary pumping station or the downhole pump.

Underground horizontal intake combined structure, constructed by the proposed method, the most effective can be used in coastal and floodplain areas of the aquifer soil with the depth of the unconfined groundwater level to 7 PM

The method of construction of underground horizontal intake is designed to supply a small settlement, agricultural enterprises, farms and individual farms.

Literature

1. Ammori Water. The diversion structure. - Kiev.: High school. Head publishing house 1984. Pp.163-165.

2. Abramov I. The water supply. -M.: 1982 - s-194.

The method of construction of underground horizontal intake combined structure including the water intake trench and drainage wells, characterized in that at the bottom of the water intake trench longitudinal rows of stacked gabion mattresses with drainage device, consisting of lung fashin and perforated pipes laid in alternating rows and wrapped in gabion mesh, on top of gabion mattresses along the trench is placed a flexible mattress, consisting of drainage aggregate, which is made of a dense series of light fashin wrapped in the geogrid, and the end portion of the trench provide rigid tray rectangular cantilever part of it is done with a bias enters into the drainage pit, this gabion mattresses with drainage device stack from the trench until the middle of the tray.



 

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