| 摘要 |
A vertical drain for dewatering saturated, compressible soils. When stored and delivered the drain has a rectangular cross section and can be rolled on reels, but since the drain can be folded longitudinally the drain, when installed in the soil will expose not less than two sides in angle to each other towards the radial flow of water to the drain. Each side consists of a band-formed core (2) with longitudinal and perpendicular channels (4 and 5) shaped by ridges (3) which are cut on certain distances and surrounded by a filter fabric (1). |
