| 摘要 |
FIELD: construction. ^ SUBSTANCE: device comprises a trench antifiltration curtain embedded into a confining layer with a vertical water-impermeable flexible screen and a trench filler from filtering material, closed along the perimetre of the dried area, inside which there is a secured site, a device for deep directed distributed supply of fresh water into the soil massif of the dried area and the secured site and a drainage device. The drainage device is made in the form of a drainage vertical well (wells) with depth below the level of ground waters. The device for fresh water supply is made in the form of water-absorbing pits (pit) with depth to the level of ground waters. In the first version the drainage well is installed in the centre of the secured site and is connected with the drainage horizontal wells arranged ray-like in the soil layer with ground waters under the secured site. Pits are arranged along the secured site perimetre in the medium of filtering material of the antifiltration curtain trench filler. In the second version two and more drainage wells are installed at one side of the secured site and are connected to each other by a drainage header. The device for water supply is made in the form of at least one pit arranged along the curtain perimetre in the medium of the filtering material of the curtain trench filler. In the third version two drainage wells are installed at one side of the secured site and are connected to each other by a drainage header and a slot drain installed at the depth below the ground waters level. The well is made at the opposite side of the secured site and is located in plan in the middle part of the trench filler from the curtain filtering material. In the fourth version two drainage well are installed one at two sides of the secured site, every of which is connected to drainage horizontal wells arranged ray-like in the soil layer with ground waters under the secured site. The device for water supply is made in the form of at least two pits, every of which is installed in the medium of the filtering material of the curtain trench filler. In the fifth version four drainage well are installed one at four sides of the secured site, every of which is connected to a drainage horizontal well arranged ray-like in the soil layer with ground waters under the secured site. The device for water supply is made in the form of at four pits, every of which is installed at the border of the dried area in the medium of the filtering material of the curtain trench filler. ^ EFFECT: increased efficiency of meliorative system operation and lower salt content in water-absorbing soil massif and drain flow down to rated parameters of mineralisation. ^ 5 cl, 14 dwg |
