Physical modelling of air injection to remediate liquefaction

Zeybek, Abdülhakim; Madabhushi, Gopal

doi:10.1680/jphmg.16.00049

Cited by 15 publications

(7 citation statements)

References 10 publications

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“…It was observed that the colour of soil varied within the zone of influence in PS-2, showing that the uniformity of the desaturation was relatively less near the left edge of the foundation. Further experimental evidence regarding this phenomenon is given, using the results of the tests with comparatively lighter shallow foundation [27]. It is important to note that air bubbles were clearly identifiable as the shiny particles reflecting two LED lights.…”

Section: Air Injection Processmentioning

confidence: 93%

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Influence of air injection on the liquefaction-induced deformation mechanisms beneath shallow foundations

Zeybek

Madabhushi

2017

Soil Dynamics and Earthquake Engineering

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The authors would like to thank the reviewers again for their time and additional comments. Based on the comments, we have attempted to cover all of their points and made changes of the manuscript, which are detailed below. Reviewer 2:The submitted manuscript presents very valuable information about the liquefaction induced deformation mechanism under the foundation in fully as well as well in partially saturated sands. However, the originality of the paper concerns me since there are figures and content published in another technical paper ("Centrifuge testing to evaluate the liquefaction response of air-injected partially saturated soils beneath shallow foundations" which has just been published in Bulletin of Earthquake Engineering). I would consider this manuscript as a technical note where most of the figures are not included and referred to the published article. The published manuscript and the submitted manuscripts presented the results from the same centrifuge tests. The results were just presented in different manners. There are same figures presented in both manuscripts as below:In the first and second round of revision, the authors were invited to revise the manuscript to address a number of technical comments. In the third round of revision, the most significant issue that has been raised by the reviewer is the originality of the paper. The authors believe that the changes made in the submitted manuscript do go a long way to ensuring that the main concern of the reviewer is addressed within the paper itself.Following the reviewer's comments, the manuscript has been changed significantly. A dataset from a series of two free-field centrifuge tests is included (see the amended Table 1). It is worth stating that the free-field test data has not been published elsewhere. The vast majority of the figures submitted in the second round of revised manuscript are replaced by the original figures. Accordingly, the relevant sections have been rewritten. The content of the paper has been significantly improved by adding more comprehensive discussions and a new dataset. The authors wish to thank the reviewers for this. 2.1-Figure 1 in both manuscripts show the same experimental setup.Answer 2.1-The cross-section of the models is modified following the comment of the reviewer, as given in Fig. 1 in this round of revised paper. Fig. 2 in published manuscript vs Fig. 6 in submitted manuscript. Answer 2.2-Following the reviewer's comment, the acceleration time histories in the previous manuscript ( Fig. 6) are removed from the manuscript and replaced by the shear stress-strain loops, as presented in Fig. 7 in the this round of revised paper. The effect of air injection on the shear stiffness of soil is demonstrated. It is noted that Fig. 2 in the published paper showed only the input (base) acceleration time histories recorded during the tests, whereas Fig. 6 submitted in the second round of revised manuscript presented the horizontal acceleration time histories recorded at different soil layers. Fig.3 in published ma...

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Section: Air Injection Processmentioning

confidence: 93%

“…From these results, it can be suggested that the desaturation of soils beneath existing foundations requires a well-controlled air injection process and close monitoring of foundation response. Zeybek and Madabhushi [27] provides further experimental data for the effective application of air injection beneath existing foundations.…”

Section: Air Injection Processmentioning

confidence: 99%

Influence of air injection on the liquefaction-induced deformation mechanisms beneath shallow foundations

Zeybek

Madabhushi

2017

Soil Dynamics and Earthquake Engineering

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“…However, these deformations as well as the bearing capacity failure were limited during reconsolidation due to the dissipation of excess pore pressure. In a similar study, Zeybek and Madabhushi [20] stated that the reconsolidation and foundation settlement were minimized for high foundations pressure, increasing the post shaking bearing capacity, but intensifying accelerations transferred to the structure.…”

Section: Methods To Induce Degree Of Saturation 21 Air-injectionmentioning

confidence: 99%

Numerical study of a desaturation process by air injection in sandy soil

Sepulveda-Cano¹,

Aristizábal²,

Vega-Posada³

2021

MATEC Web Conf.

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This work aims to numerically study the desaturation process in a coarse-grained sandy deposit by means of air injection. It is well-known that the soil cyclic strength to liquefaction of a saturated, sandy deposit is positively affected by the presence of gas in the void space in either a dissolved or a free form. A numerical study is performed to investigate some of the factors affecting the desaturation advance and controlling the soil desaturation process by air injection. Among these factors are: a) soil-water characteristic curve and intrinsic permeability (hydraulic parameters), b) injection time, and c) standard approach to two injection wells placement. Only the standard mechanisms of biphasic flow are investigated (i.e., incompressible and isothermal biphasic flow in an isotropic homogeneous porous media with capillary effects).

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“…Since 1999, 210 projects have been successfully executed using this methodology [33]. Silica and air is injected replacing the porosity of the soil and reducing the properties of permeability [33][34].…”

Section: Silica Injection Using Curved Grouted Penetration Techniqmentioning

confidence: 99%

“…[36] tried to reduce the degree of saturation of the soil through the injection of air. Centrifugal dynamics was used for the injection of air found that this injection reduces the deformations of the soil and the average settlements [34].…”

Section: F Air Injection To Reduce Deformation Under Surface Foundatmentioning

confidence: 99%

Prediction methods of liquefaction phenomenon and mitigation strategies

Araujo¹,

Palinginis²,

Ruiz³

2018

Proceedings of the 16th LACCEI International Multi-Conference for Engineering, Education, and Technology: “Innovation in Educat

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The main objective of this research is to present a review about methods of analysis and mitigation in soil liquefaction, especially in those of sandy and loose density soils. The experience of different researchers shows that the most suitable methods of analysis are those that are based on "in situ" tests data while preserving the soil properties, especially those based on the use of SPT (Standard Penetration Test) because of the greatest existing data. Likewise, the most suitable mitigation methods is using gravel drains due to several advantages that improve liquation resistance, increasing the densification of soil, improving the drainage (quickly dissipates the interstitial pressures in an earthquake) and reduces cyclical tangential stress (which contributes to liquefaction) due to flexibility of the gravel pack.

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Physical modelling of air injection to remediate liquefaction

Cited by 15 publications

References 10 publications

Influence of air injection on the liquefaction-induced deformation mechanisms beneath shallow foundations

Influence of air injection on the liquefaction-induced deformation mechanisms beneath shallow foundations

Numerical study of a desaturation process by air injection in sandy soil

Prediction methods of liquefaction phenomenon and mitigation strategies

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