Journal: Journal of Geotechnical and Geoenvironmental Engineering

Abbreviation

J. geotech. geoenviron. eng.

Publisher

American Society of Civil Engineers

Journal Volumes

ISSN

1090-0241
1943-5606

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Publications 1 - 10 of 22
  • Pressure-Dependent Elasticity and Energy Conservation in Elasto-Plastic Models for Soils
    Item type: Journal Article
    Einav, Itai; Puzrin, Alexander M. (2004)
    Journal of Geotechnical and Geoenvironmental Engineering
  • Interpretation of Interbedded Thin–Soft Layer Properties from T-Bar Penetration Tests
    Item type: Journal Article
    Han, Yunrui; Zhang, Wangcheng; Long, Yu; et al. (2022)
    Journal of Geotechnical and Geoenvironmental Engineering
    Layered soil conditions are common in marine sediments, and deduction of strength properties for thin interbedded layers is often challenging. Full-flow penetrometers such as T-bar are increasingly being used in offshore site investigations and show high potential for differentiating the shear strength transition between layers. This paper reports the results from large deformation finite-element analysis undertaken to provide insight into the response of a T-bar penetrometer as it continuously penetrates through stiff-soft-stiff clay layers. The numerical results are validated against data from a centrifuge model test. Trapped soil is observed for any nonsmooth interface as the T-bar penetrates from a stiff to a softer soil layer, which affects the measured resistance of the soft layer. The effect of a cavity above the advancing T-bar was also investigated. The presence of a cavity can increase the sharpness of the transition in resistance from one layer to another, which thus affects estimation of the boundary of the soft layer. The evolution of trapped soil from the top layer within the soft layer, and then its erosion in the bottom layer, were explored. The research found that the measured resistance profile in the soft layer is sensitive to the strength ratio between the top layer and soft layer, but the resistance of the bottom layer is more reliable. Based on deduced measurement parameters from the resistance profile, a new interpretation framework is proposed for interpreting the layer boundaries and undrained shear strength of the interbedded soft layer.
  • Unsaturated Soil Mechanics: Fundamental Challenges, Breakthroughs, and Opportunities
    Item type: Journal Article
    Lu, Ning (2020)
    Journal of Geotechnical and Geoenvironmental Engineering
  • Liquefaction risk assessment using geostatistics to account for soil spatial variability
    Item type: Journal Article
    Baker, Jack W.; Faber, Michael H. (2008)
    Journal of Geotechnical and Geoenvironmental Engineering
  • Closure to "Case Study: Oso, Washington, Landslide of March 22, 2014Material Properties and Failure Mechanism" by Timothy D. Stark, Ahmed K. Baghdady, Oldrich Hungr, and Jordan Aaron
    Item type: Other Journal Item
    Stark, Timothy D.; Baghdady, Ahmed K.; Hungr, Oldrich; et al. (2018)
    Journal of Geotechnical and Geoenvironmental Engineering
  • Bearing Capacity of Breakwater Subjected to Tsunami-Induced Scour
    Item type: Journal Article
    Jones, Liam Alexander; Anastasopoulos, Ioannis (2023)
    Journal of Geotechnical and Geoenvironmental Engineering
    Physical models have suggested a large reduction in bearing capacity of simple foundations due to overtopping tsunami scour. We use the results of these tests to create scoured foundation geometries for simple breakwater-type structures and investigate the change in the system's capacity due to scour through the use of simple two-dimensional (2D) numerical analysis using an advanced constitutive model. The particular aspects of the construction of such models and the general applicability of the method are also discussed. A simple method for estimating the reduction in capacity due to scour is proposed through the use of modified vertical, horizontal force, and moment (VHM) failure surfaces. The general method for creating such simplified scour-dependent failure surfaces is described thoroughly, such that the process can be replicated for other foundation configurations or scour problems. Results indicated that even a small amount of scouring can lead to a substantial reduction in the horizontal and moment capacity of a foundation, the effect of scour is shown to be a nonuniform contraction of the failure envelope, where both the ultimate vertical capacity V0 as well as the relative ratios between vertical, horizontal and moment capacity are strongly affected by the presence of scour. Such a conclusion demonstrates clearly how simply increasing the unscoured factor of safety of such structures is not sufficient to guarantee stability in the event of scouring. The presented methodology for determining the scoured failure surfaces provides a simple, logical means to estimate the performance of such systems undergoing scour.
  • Piping Criteria for Hydraulically Stable Anisotropic Slopes
    Item type: Journal Article
    Puzrin, Alexander (2021)
    Journal of Geotechnical and Geoenvironmental Engineering
    Piping has been a documented cause of collapse of multiple tailings dams, hydraulic structures and natural slopes. Important limitation of the existing piping criteria for a sloped ground is that they are treating soils as hydraulically isotropic, which is rarely the case in real life problems. Another obstacle for wider application of these criteria in engineering practice is that they have not been translated into an adequate definition of the safety factor against piping. This paper provides rigorous yet simple piping criteria and safety factors for slopes built of hydraulically stable anisotropic materials, as well as the safety factor against instability of an infinite anisotropic slope with a slope-parallel flow. It has been demonstrated why it is important to account for anisotropy, and how the proposed analytical expressions can be applied to practical problems with calculated flow nets and piezometric field measurements.
  • Ground-Buried Fiber-Optic Sensors for Object Identification
    Item type: Journal Article
    Friedli, Balz; Pizzetti, Luca; Hauswirth, Dominik; et al. (2019)
    Journal of Geotechnical and Geoenvironmental Engineering
  • Oso, Washington, Landslide of March 22, 2014: Dynamic Analysis
    Item type: Journal Article
    Aaron, Jordan; Hungr, Oldrich; Stark, Timothy D.; et al. (2017)
    Journal of Geotechnical and Geoenvironmental Engineering
  • Closure to “Oso, Washington, Landslide of March 22, 2014: Dynamic Analysis” by Jordan Aaron, Oldrich Hungr, Timothy D. Stark, and Ahmed K. Baghdady
    Item type: Other Journal Item
    Aaron, Jordan; Stark, Timothy D.; Baghdady, Ahmed K. (2018)
    Journal of Geotechnical and Geoenvironmental Engineering
Publications 1 - 10 of 22