CONSTRUCTION METHOD UTILIZING SLUG PILE COMBINING TOGETHER CHRACTERISTICS OF SAND DRAIN CONSTRUCTION PROCESS AND OF PLAIN CONCRETE PILE CONSTRUCTION METHOD

摘要

PURPOSE:To prevent the occurrent of an alkaline secondary pollution through the promotion of a hardening reaction, by a method wherein, in a soft ground treating process, aluminium sulfide or its salt is mixed with a slug for agitation, and the mixture is driven into the ground instead of a sand pile. CONSTITUTION:Aluminium sulfide or its salt is added to a slug for mixture, and a slug pile is formed in a soft ground by a conventional sand drain process, a vibro- floatation process, and other processes. Resulting from the addition of ammonium sulfide to the slug, a hydraulic reaction occurs rapidly, and the slug pile forms a support pile in a short time. At an initial process of a gelation, hydrogen sulfide is generated, and this prevents choking of gaps between slug particles through the aid of a large number of fine cavities in the slug, and improves water permeability. Additionally, this neutralizes alkalinity in the slug.