A new method of combination of electroosmosis, vacuum and surcharge preloading for soft ground improvement

Liu, Hanlong; Cui, Yuxiang; Shen, Yang; Ding, Xuanming

doi:10.1007/s13344-014-0042-3

Cited by 48 publications

(11 citation statements)

References 17 publications

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“…Because of the features of large void ratio, high compressibility, and low permeability for dredged soils, the self‐weight consolidation process could take a long time. Different preloading techniques, including electro‐osmosis preloading, vacuum preloading, and surcharge preloading, have been employed to accelerate the consolidation process. Vertical drainage channels are often included in the soil, such as the use of prefabricated vertical drains, sand drains, stone columns, pervious concrete piles, and permeable pipe piles .…”

Section: Optimization Of the Layout Of Horizontal Drainmentioning

confidence: 99%

One‐dimensional self‐weight consolidation with continuous drainage boundary conditions: Solution and application to clay‐drain reclamation

Feng

Mei

2019

Num Anal Meth Geomechanics

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Summary Traditional consolidation theories cannot provide good predictions of consolidation settlement in land reclamation because of their assumptions that the influence of soil's self‐weight is often neglected, and the drainage boundary is considered as fully pervious/impervious. In view of these limitations, an analytical solution is derived for one‐dimensional self‐weight consolidation problems with a continuous drainage boundary using the finite Fourier sine transform method. Following the classical Terzaghi's small strain theory, the soil's self‐weight is considered to produce consolidation settlement in dredged materials with a constant coefficient of consolidation. The continuous drainage boundary can essentially describe the time‐dependent variation of drainage capacity at the interface between two adjacent soil layers. By reducing the interface parameters, the effectiveness of the calculation is demonstrated against the Terzaghi's solution. The influence of interface parameters and soil's self‐weight stress coefficient on self‐weight consolidation is discussed. As expected, the rate of consolidation considering the self‐weight stress is faster, although the dependency of consolidation rate on the material property of void ratio is neglected. Moreover, the plane of maximum excess pore‐water pressure is estimated as a function of time factor, based on which a design chart is developed to optimize the layout of horizontal drains in land reclamation.

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Section: Optimization Of the Layout Of Horizontal Drainmentioning

confidence: 99%

One‐dimensional self‐weight consolidation with continuous drainage boundary conditions: Solution and application to clay‐drain reclamation

Feng

Mei

2019

Num Anal Meth Geomechanics

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“…To accelerate the consolidation, one solution is to combine the process of electroosmosis with the vacuumsurcharge preloading method, enabling a tri-element consolidation solution. The electroosmosis component has shown to be effective in driving a stream of water through a clogging smear zone or a less permeable area [6,7], and the performance complements the other two elements, as reported in various applications [8][9][10].…”

Section: Introductionmentioning

confidence: 91%

Modelling combined electroosmosis–vacuum–surcharge preloading consolidation considering large-scale deformation

Zhou

Deng

2019

Computers and Geotechnics

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After the embargo period  via non-commercial hosting platforms such as their institutional repository  via commercial sites with which Elsevier has an agreement In all cases accepted manuscripts should: link to the formal publication via its DOI  bear a CC-BY-NC-ND licensethis is easy to do  if aggregated with other manuscripts, for example in a repository or other site, be shared in

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“…The vacuum preloading approach for soft ground improvement has been implemented as a practical, cost-effective, and environmentally sustainable technique [1][2][3][4][5] since the time it was first introduced [6]. The method is now considered one of the most effective techniques for soft ground improvement projects worldwide, considering both the time of treatment and soil parameters [1][2][3][7][8][9][10][11]. The vacuum preloading technique can increase the strength of the treated soft soil at a rapid rate and reduces its post-construction consolidation settlement [5,12].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Asaoka and Hyperbolic Methods for Settlement Prediction of Vacuum Preloading Combined with Prefabricated Vertical Drains in Soft Ground Treatment

Pham¹,

Ngo

Tran

et al. 2022

J. Eng. Technol. Sci.

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This study evaluated the use of the Asaoka and hyperbolic methods to estimate the ultimate settlement of soft ground treated by vacuum preloading combined with prefabricated vertical drains. For this aim, a large-scale physical laboratory model was constructed. The model was a reinforced-tempered glass box containing a soil mass with dimensions of 2.0 × 1.0 × 1.2 m (length × width × depth). Physical models of this scale for the same purpose are rare in the literature. The soil was taken from a typical coastal region in Dinh Vu Hai Phong, Vietnam. The surface settlement near and between the two drains was measured right after the vacuum preloading started. Important properties of the soil were tested to evaluate the effectiveness of the treatment method. The measured settlement was used in the Asaoka and hyperbolic methods to predict the potential ultimate settlement. The results showed the superiority of the vacuum consolidation approach in improving fundamental engineering properties of soft soil. Furthermore, the ultimate settlement predicted by both methods showed a good agreement with the measured value, proving that the Asaoka and hyperbolic methods are suitable for the estimation of the ultimate settlement of soft soil treated with vacuum consolidation.

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A new method of combination of electroosmosis, vacuum and surcharge preloading for soft ground improvement

Cited by 48 publications

References 17 publications

One‐dimensional self‐weight consolidation with continuous drainage boundary conditions: Solution and application to clay‐drain reclamation

One‐dimensional self‐weight consolidation with continuous drainage boundary conditions: Solution and application to clay‐drain reclamation

Modelling combined electroosmosis–vacuum–surcharge preloading consolidation considering large-scale deformation

Evaluation of Asaoka and Hyperbolic Methods for Settlement Prediction of Vacuum Preloading Combined with Prefabricated Vertical Drains in Soft Ground Treatment

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