Development of a Vacuum Consolidation Method Employing Horizontal Drains,
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1992
- Accession Number
- ADP006467
Entities
People
- H. H. Shinsha
- T. Chiba
- Y. Tani