Development of a Vacuum Consolidation Method Employing Horizontal Drains,
JAPAN DREDGING AND RECLAMATION ENGINEERING ASSOCIATION TOKYO
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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.
- Solid Wastes and Pollution and Control
- Water Pollution and Control