| 摘要 |
A dewatering method of present invention comprises digging through with a hammer bit at the same angle as a back rake angle keeping a certain distance from an excavation slope; inserting a casing with the same diameter as the hammer bit into soil stratum; inserting an in-casing in the casing into the bottom area of a landfill; installing a submerged motor pump in the lower part of the in-casing; building a subsoil-drain collecting well which collects underground water through a perforated drainpipe laid under the bottom area of the landfill; having a non-perforated drainpipe connecting both the subsoil-drain collecting well and a subsoil-drain unit; and eliminating the underground water flowing into the in-casing by pumping out with the submerged motor pump in the lower part of the in-casing. |
