Accession Number : ADP006467

Title :   Development of a Vacuum Consolidation Method Employing Horizontal Drains,

Corporate Author : JAPAN DREDGING AND RECLAMATION ENGINEERING ASSOCIATION TOKYO

Personal Author(s) : Chiba, T. ; Shinsha, H. H. ; Tani, Y.

Report Date : MAR 1992

Pagination or Media Count : 22

Abstract : A vacuum consolidation method employing horizontal drains has been developed as a way to improve very soft ground. In this method, plastic board drains are laid in extremely soft ground with roughly 1.0-m square arrangement, and a vacuum is applied to the clayey soil from one end of the drain to consolidate and improve the soil. From this development project, the following conclusions were reached: (a) According to laboratory experiments conducted on vacuum consolidation, a high level of improvement equivalent to loading consolidation has been obtained when a vacuum is applied to clayey soil. (b) From the onsite experiments, it was found to be relatively easy to lay horizontal drains in the ground. (c) It was verified that soil in landfills produced by the disposal of dredged clayey soil and in disposal sites containing slurry can be significantly improved by this method.

Descriptors :   *SOILS, *DRAINAGE, DISPOSAL, LABORATORIES, LANDFILLS, SITES, SLURRIES, VACUUM.

Subject Categories : Solid Wastes Pollution and Control
      Water Pollution and Control

Distribution Statement : APPROVED FOR PUBLIC RELEASE