Consolidation Characteristics of Dredged Marine Bottom Sediments with High Water Content

Umehara, Yasufumi; Zen, Kouki

doi:10.3208/sandf1972.22.2_40

Cited by 20 publications

(3 citation statements)

References 4 publications

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“…With settling-column technique, one can get the compression curve over a very low stress range (Imai 1981;Umehara and Zen 1982;Scully 1984). Combining the void ratio profile and the effective stress variation with depth, the void ratio-effective stress relationship can be established.…”

Section: Settling Results and Discussionmentioning

confidence: 99%

“…The f-p and the k-f relationships, for numerical analysis of the self-weight consolidation, can be determined by the hydraulic consolidation test (Imai 1981) or by the centrifugal model test (Mikasa and Takada 1984). Besides, these relationships can also be determined in a constant rate of strain (CRSN) consolidation (Umehara and Zen 1982).…”

Section: Introductionmentioning

confidence: 99%

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Experimental Study on Complete Consolidation Behavior of Hong Kong Marine Deposits

Tong

Yin

Pei

2012

Marine Georesources & Geotechnology

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The time-dependent feature of soft soils has gained intensive attraction in recent years. Due to the high water content and viscous property, the Hong Kong marine deposit (HKMD) frequently poses a challenge to geotechnical practice, particularly to the reclamation in Hong Kong. A key issue related to reclamation design, foundation construction and maintenance is excess settlement=deformation of the ground. Formation of HKMD typically goes through sedimentation and self-weight consolidation. A series of one-dimensional settling column consolidation tests, together with conventional oedometer tests were conducted on the HKMD. By normalizing parameter in settling stage, a unique global relationship of effective stress, r z 0 and strain, e z could be established. Results reveal that the settling curve and settling rate are significantly affected by the sediment concentration in self-weight consolidation. After the primary self-weight consolidation, the settling rate is reduced in the ''secondary self-weight consolidation.''

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Section: Settling Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Study on Complete Consolidation Behavior of Hong Kong Marine Deposits

Tong

Yin

Pei

2012

Marine Georesources & Geotechnology

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“…The vacuum preloading method was developed more than 70 years [1] and has played an important role in treating dredged slurry with high fluidity, high water content, high clay content, large compressibility, and low strength [2][3][4][5][6][7]. However, as a long-term practice, the conventional vacuum preloading method has shown some shortcomings [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on dredged slurry improved by vacuum preloading with top and bottom drainage

Fu,

Lin,

Wang

et al. 2023

Preprint

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The conventional vacuum preloading method is widely used to treat dredged slurry. However, this method cannot fully meet engineering requirements due to the loss of vacuum pressure. To overcome this issue, a method of vacuum preloading with top and bottom drainage is proposed, and the consolidation behavior of this method and the influence of the time ratio (a ratio of bottom vacuum application time to top vacuum application time) on this method are studied through laboratory model experiments. The results demonstrated that compared with the conventional vacuum preloading method, the average vane shear strength of the dredged slurry treated by vacuum preloading with top and bottom drainage increased by 20.6%, and the water content reduced by 6.0%. The time ratio has a significant effect on the consolidation of the dredged slurry, and the optimum time ratio is 1:1. Thus, vacuum preloading with top and bottom drainage can better complete the consolidation of the dredged slurry. In addition, this method can be used to develop a design guide for engineering practice.

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A Bibliography of Consolidation

Schiffman

1984

Fundamentals of Transport Phenomena in Porous Media

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Consolidation Characteristics of Dredged Marine Bottom Sediments with High Water Content

Cited by 20 publications

References 4 publications

Experimental Study on Complete Consolidation Behavior of Hong Kong Marine Deposits

Experimental Study on Complete Consolidation Behavior of Hong Kong Marine Deposits

Experimental study on dredged slurry improved by vacuum preloading with top and bottom drainage

A Bibliography of Consolidation

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