Development of a Geomaterial from Dredged Bay Mud

Tsuchida, Takashi; Porbaha, Ali; Yamane, Nobuyuki

doi:10.1061/(asce)0899-1561(2001)13:2(152)

Cited by 68 publications

(27 citation statements)

References 5 publications

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“…For the other EPS-based specimens, shear contraction was seen throughout. It is also seen that strain-hardening levels increase with the confining pressure 3  . It is interpreted that confining pressure enhances the densification of mixtures.…”

Section: Stress-strain Characteristicsmentioning

confidence: 77%

“…Such beads were made by pre-puffed polymer resins, at an enlargement ratio of 35-40. The particle size, bulk density and specific gravity of EPS beads were 2-3 mm, 0.015 g/cm 3 and 0.03, respectively. EPS beads were blended homogeneously with sands in accordance with the mass ratios ( ) of beads to sands, i.e.,  =0, 0.5%, 1.5% and 2.5%.…”

Section: Laboratory Proceduresmentioning

confidence: 99%

“…Under a confining pressure 3  , the stresses decrease with the increase of EPS ratios. For pure sands ( =0), shear contraction was seen at first, then shortly and clearly transited into shear dilatancy.…”

Section: Stress-strain Characteristicsmentioning

confidence: 99%

“…The next distinction is about the association of shear contraction with confining pressures 3  . It is seen in Fig.…”

Section: Stress-strain Characteristicsmentioning

confidence: 99%

“…Density of the lightweight fills could be effectively controlled via the inclusion of PSPP, whereas, cement inclusion became a barrier for economical saving. Tsuchida et al [3] developed a lightweight fill based on dredged mud and EPS beads, which has limited applications. EPS block geofoam was applied to mitigate settlement of bridge approach embankments constructed over compressible soils [4][5][6] , but not suitable for confined space and inaccessible locations.…”

Section: Introductionmentioning

confidence: 99%

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Shear behavior of sand-expanded polystyrene beads lightweight fills

Deng

Xiao

2008

J. Cent. South Univ. Technol.

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Sand-expanded polystyrene (sand-EPS) beads lightweight fills are geomaterials formed by blending sands and EPS beads. Through direct shear and triaxial compression tests, effects of EPS ratios and stress status on materials' shear behavior were investigated. The shear behavior is marginally associated with the EPS ratios and normal/confining stresses. Hyperbolic curves were used to fit relationship between shear stress and shear displacement. Increases of EPS ratios and decreases of normal/confining stresses result in shear strength decreases. The shapes of Mohr-Coulomb's envelope include linear and piecewise linear types, which are basically determined by the EPS ratio. Such difference is thought related to the embedding or apparent cohesion effect under relatively high EPS ratio conditions. Shear strength parameters were presented to be used for further modeling and design purposes.

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Section: Stress-strain Characteristicsmentioning

confidence: 77%

Section: Laboratory Proceduresmentioning

confidence: 99%

Section: Stress-strain Characteristicsmentioning

confidence: 99%

“…The next distinction is about the association of shear contraction with confining pressures 3  . It is seen in Fig.…”

Section: Stress-strain Characteristicsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Shear behavior of sand-expanded polystyrene beads lightweight fills

Deng

Xiao

2008

J. Cent. South Univ. Technol.

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Plane‐strain model for large strain consolidation induced by vacuum‐assisted prefabricated horizontal drains

Song

Yin

et al. 2023

Num Anal Meth Geomechanics

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Vacuum-assisted prefabricated horizontal drain (PHD) can be used to accelerate the consolidation process of dredged mud slurry with high water content, and this method exhibits advantages over traditional treatment methods that use prefabricated vertical drain (PVD). However, large-strain model that can simulate soil consolidation induced by vacuum-assisted PHDs is missing in the literature, although the large-strain models for PVD-induced radial consolidation are abundant. This study presents a piecewise-linear plane-strain model for large-strain consolidation induced by vacuum-assisted prefabricated horizontal drains. The model is called PCS, abbreviation for Plane-strain Consolidation Settlement. PCS model can account for complex conditions including large strain, multiple layers of PHD boards, staged filling of soil layers, varying spacing of PHD boards, time-dependent surcharge and/or vacuum loading, soil self-weight, nonlinear compressibility, and hydraulic conductivity during the consolidation process, vertical and horizontal flows, and non-Darcian flow. The PCS is validated using the two-dimensional Terzaghi's consolidation theory (small strain) and a largescale laboratory model test (large strain), which involves multiple soil layers filled in stages, multiple PHD layers, and different horizontal spacings of PHD boards. Lastly, the proposed model is applied to a case study conducted at Shimokita Peninsula (Aomori Prefecture, Japan), where vacuum-assisted PHDs have been used to treat the dredged mud slurry for a duration of 330 days.

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