A composite drainage and decontamination device with pre-set sand wells and plastic drainage boards in the reclamation area

Abstract

The invention relates to a reclamation area preformed sand well-plastic drainage plate composite drainage and decontamination device. The device comprises an upper decontamination assembly and a lower drainage assembly which are integrally connected, wherein the upper decontamination assembly comprises an upper geomembrane bag, a decontamination material located on the lower portion and filling fine sand located on the upper portion, and the decontamination material and the filling fine sand are arranged in the upper geomembrane bag and separated by a permeable membrane; the lower drainage assembly comprises a lower geomembrane bag, a bottom sand bag, a sand well central pipe and plastic drainage plates; the lower geomembrane bag and the bottom sand bag are both filled with filtering materials; the bottom sand bag is arranged at the bottom of the lower geomembrane bag; the sand well central pipe is arranged in the center of the interior of the lower geomembrane bag; the pipe wall of the sand well central pipe is further provided with a plurality of rows of drainage holes distributed along the axis; and the plastic drainage plates are rotationally connected with the lower geomembrane bag, and the effect that the plastic drainage plates can freely rotate in the vertical direction is ensured. Compared with the prior art, the reclamation area preformed sand well-plastic drainage plate composite drainage and decontamination device is high in functional comprehensiveness, low in cost, convenient to preset on a large scale and has other advantages.

Description

Technical field [0001] The invention relates to a sand well-plastic drainage board composite drainage and decontamination device, in particular to a pre-installed sand well-plastic drainage board composite drainage and decontamination device in a blow filling area. Background technique [0002] In many areas of my country with vast water areas, especially the economically developed coastal areas, the land reclamation project has developed rapidly this year and the scale is large, mostly larger than 1km. 2 In the coastal urban areas of the Bohai Bay, the Yangtze River Delta and the Pearl River Delta, many reclamation sites have an area of ​​up to 10km in recent years 2 the above. After these large-scale hydraulic fill sites are formed, they are usually placed for several years, and the soil is fully drained and consolidated before being used in engineering. In addition, the sediment of many coastal waters is seriously polluted due to industrial pollution discharge in neighboring a...

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Problems solved by technology

However, the device does not involve the decontamination function, and when the device is preset at the site, it is difficult for other ships and equipment to move in the site without destroying the preset device during construction, which limits its preset Maximum size achievable

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