Compaction/Liquefaction Properties of Some Model Sands

Sawicki, Andrzej; Mierczyński, Jacek; Sławińska, Justyna

doi:10.1515/heem-2015-0023

Cited by 2 publications

(7 citation statements)

References 6 publications

(4 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 5 illustrates characteristic possible shapes of elastic deformations (strains) of the porous seabed under a progressive sinusoidal water-wave together with a commonly used in soil mechanics sign convention for the wave-induced shear stress of a small two-dimensional elastic soil element. A deformed shape of a soil element in the upper part of the seabed was presented qualitatively only by a few of researchers, among them: Kirca et al [31], Sawicki and Mierczyński [32], Sumer and Fredsøe [33] and Sumer [10]. However, their presentations are very general because they are limited only to one possible case and they did not contain any information about the sign of the shear stress (just a shape).…”

Section: Discussion On Some Existing Analytical Solutionsmentioning

confidence: 99%

“…Kirca et al [31] (see the original Fig. 1) and Sawicki and Mierczyński [32] (see the original Fig. 1) illustrated schematically only one basic deformation shape of a soil element, where the directions of stress components indicate their positive values according to the soil mechanics sign convention for strains and stresses, assuming additionally the positive z-axis directed upwards [31] or downwards [32].…”

Section: Discussion On Some Existing Analytical Solutionsmentioning

confidence: 99%

“…1) illustrated schematically only one basic deformation shape of a soil element, where the directions of stress components indicate their positive values according to the soil mechanics sign convention for strains and stresses, assuming additionally the positive z-axis directed upwards [31] or downwards [32]. Unfortunately there is an obvious discrepancy between the definition sketch presented by Sawicki and Mierczyński [32], who adopted the solution obtained by Yamamoto et al [9] where the solid mechanics sign convention was customized. Illustrations given by Sumer and Fredsøe [33] (see the original Fig.…”

Section: Discussion On Some Existing Analytical Solutionsmentioning

confidence: 99%

See 2 more Smart Citations

Importance of sign conventions on analytical solutions to the wave-induced cyclic response of a poro-elastic seabed

Magda

2024

Archives of Civil Engineering

View full text Add to dashboard Cite

This paper discusses the influence of different sign conventions for strains and stresses, i.e. the solid mechanics sign convention and the soil mechanics sign convention, on the form of governing partial differential equations (the static equilibrium equations and the continuity equation) used to describe the wave-induced cyclic response of a poro-elastic seabed due to propagation of a sinusoidal surface water-wave. Some selected analytical solutions, obtained by different authors and published in specialist literature in the form of complex functions describing the wave-induced pore-fluid pressure, effective normal stress and shear stress oscillations in the seabed, have been analysed and compared with each other mainly with respect to different sign conventions for stains and stresses and also with regard to different orientations of the positive vertical axis of the two-dimensional coordinate system and different directions of surface water-wave propagation. The performed analyses of the analytical solutions has indicated many inaccuracies, or even evident errors and exemplary mistakes of wrong-signed values of basic wave-induced response parameters (the shear stress in particular), thereby disqualifying these solutions and their final equations from practical engineering applications. Most of the mistakes found in the literature must be linked to authors’ lack of understanding and consistency in an uniform application of a certain sign convention for strains and stresses in the soil matrix at both stages of mathematical formulation of the governing problem and correct interpretation of equations of the final analytical solution. The present paper, based mostly on a thorough literature review, ought to draw attention and arouse interest among coastal scientists and engineers in proper identification and use of the existing analytical solutions to the wave-induced cyclic seabed response – solutions which differ very often in the applied sign convention for stresses in the soil matrix.

show abstract

Section: Discussion On Some Existing Analytical Solutionsmentioning

confidence: 99%

Section: Discussion On Some Existing Analytical Solutionsmentioning

confidence: 99%

Section: Discussion On Some Existing Analytical Solutionsmentioning

confidence: 99%

See 1 more Smart Citation

Importance of sign conventions on analytical solutions to the wave-induced cyclic response of a poro-elastic seabed

Magda

2024

Archives of Civil Engineering

View full text Add to dashboard Cite

show abstract

“…The finalized base curve for the SPT-based liquefaction triggering analysis is presented as (N 1 ) 60cs versus CSR σ ν0=1 M W =7. 5 . Table 2 shows the soil profile and SPT-based liquefaction risk results using the Boulanger and Idriss 2014 method [31] before and after jet grouting by implementing micropiles.…”

Section: Spt-based Simplifeid Liquefaction Assessment (Site Ii)mentioning

confidence: 99%

“…In the past, traditional soil improvement techniques have been developed to increase soils' effective stress such as soil dynamic and vibro compaction [5] permanent dewatering [6], blast densification [7,8], deep soil mixing [9,10], and post-liquefaction dissipation of pore pressure [11], along with the gravel vertical drain method [12]. The stone column stabilization technique is also used for decreasing liquefaction potential [13,14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Micropiles on Clean Sand Liquefaction Risk Based on CPT and SPT

2020

View full text Add to dashboard Cite

Liquefaction is a hazardous seismic-based phenomenon, which causes an abrupt decrease in soil strength properties and can result in the massive destruction of the built environment. This research presents a novel approach to reduce the risk of soil liquefaction using jet-grouted micropiles in clean sands. The saturated soil profile of the study project mainly contains clean sands, which are suitable to more reliably employ simplified soil liquefaction analyses. The grouting is conducted using 420 micropiles to increase the existing soil properties. The effect of jet grouting on reducing the potential of liquefaction is assessed using the results of the cone penetration test (CPT) and the standard penetration test (SPT), which were conducted before and after jet grouting by implementing micropiles in the project sites. According to three CPT-based liquefaction analyses, the Juang method predicts the most effective improvement range of the factor of safety in the clean sand. The Boulanger and Idriss, and Eurocode methods show comparable evaluations. Results of the SPT-based analyses show the most considerable increase of the factor of safety following the Boulanger and Idriss, and NCEER approaches in the SP soil. CPT- and SPT-based analyses confirm the effectiveness of jet grouting by micropiles on enhancing soil properties and reducing the risk of liquefaction.

show abstract

Compaction/Liquefaction Properties of Some Model Sands

Cited by 2 publications

References 6 publications

Importance of sign conventions on analytical solutions to the wave-induced cyclic response of a poro-elastic seabed

Importance of sign conventions on analytical solutions to the wave-induced cyclic response of a poro-elastic seabed

Effect of Micropiles on Clean Sand Liquefaction Risk Based on CPT and SPT

Contact Info

Product

Resources

About