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Improved air-booster vacuum preloading method for newly dredged fills: Laboratory model study.
- Source :
- Marine Georesources & Geotechnology; Apr2020, Vol. 38 Issue 4, p493-510, 18p
- Publication Year :
- 2020
-
Abstract
- Newly dredged fills feature a high moisture content and a high floating mud content. Based on the conventional vacuum preloading (CVP) method, this article presents a new method of air-booster vacuum preloading (AVP) to reinforce newly dredged fills for different air-booster periods (45, 60 and 90 min). Compared with other methods, this new method features no sand cushion and adopts a self-developed air-booster pipe and a water–air separation device. A series of laboratory model tests were performed to explore the effect of the improved AVP method for the enhancement of newly dredged fills. A comparison of variables monitored during reinforcement (vacuum pressure, surface settlement, water discharge and pore-water pressure) and after reinforcement (water content, vane shear strength, SEM and MIP) indicates that the reinforcement effect of the AVP method is superior to that of the CVP method; the former can effectively alleviate the problem of prefabricated vertical drain (PVD) clogging, greatly reducing engineering costs and significantly shortening construction periods. [ABSTRACT FROM AUTHOR]
- Subjects :
- VERTICAL drains
VACUUM
SHEAR strength
Subjects
Details
- Language :
- English
- ISSN :
- 1064119X
- Volume :
- 38
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Marine Georesources & Geotechnology
- Publication Type :
- Academic Journal
- Accession number :
- 142533068
- Full Text :
- https://doi.org/10.1080/1064119X.2019.1599088