- Title
- Methods of vacuum consolidation and their deformation analyses
- Creator
- Chai, Jinchun; Carter, John P.; Liu, Martin D.
- Relation
- Proceedings of the Institution of Civil Engineers: Ground Improvement Vol. 167, Issue 1, p. 35-46
- Publisher Link
- http://dx.doi.org/10.1680/grim.13.00017
- Publisher
- ICE Publishing
- Resource Type
- journal article
- Date
- 2014
- Description
- Two methods, namely the air-tight sheet method and the vacuum-drain method (sheetless), are generally used to conduct vacuum consolidation in the field. The advantages and disadvantages of both methods and the techniques for preventing vacuum leakage through a middle sand layer in a deposit, as well as the method for maintaining vacuum pressure when large settlement occurs, have been described. Vacuum pressure is an isotropic consolidation pressure applied to a soil deposit, and the deformation induced is different from that induced by a surcharge (e.g. the weight of an embankment). Two typical case histories in Japan are presented and deformation analyses were conducted. In one case history the vacuum-drain method was used with vacuum pressure alone, and in the other a combination of embankment loading and vacuum pressure was applied employing the air-tight sheet method. It is shown that under vacuum pressure loading, the ground deformation (settlement and lateral displacement) can be calculated reliably using a method proposed previously. For the case involving a combination of vacuum pressure and embankment load, the settlements under the embankment centreline can be estimated reasonably assuming one-dimensional deformation conditions.
- Subject
- embankments; field testing & monitoring; geotechnical engineering
- Identifier
- http://hdl.handle.net/1959.13/1064135
- Identifier
- uon:17470
- Identifier
- ISSN:1755-0750
- Language
- eng
- Full Text
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