Drainage system <br><br>(1) Vertical drainage system: In this site, SPB-B plastic drainage plates are inserted in the soft soil layer as vertical drainage channels, with a depth of 21m, and a spacing of 1m * 1m, square arrangement. <br>(2) Horizontal drainage system: Lay a layer of woven geotextile on the site, connect the drainage plate with a special vacuum pre-pressure connector and vacuum secondary filter tube, connect the vacuum secondary filter tube to the vacuum main pipe, and finally pass through the membrane outlet device and vacuum pump connection.
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