Effects of drainage condition on the stress-strain behavior and pore pressure buildup of sand-PET mixtures

Shariatmadari, Nader; Karimpour-Fard, Mehran; Hasanzadehshooiili, Hadi; Hoseinzadeh, Saman; Karimzadeh, Zaniar

doi:10.1016/j.conbuildmat.2019.117295

Cited by 13 publications

(2 citation statements)

References 32 publications

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“…It is widely applied to a variety of geotechnical engineering problems to find the relationship between a complex function and its affecting parameters [ 47 , 83 , 84 , 85 , 86 , 87 , 88 ]. In this paper, to predict the excess pore water pressure ratio and the required cycles to achieve the peak EPWP ratio values, an evolutionary polynomial regression (EPR) model is developed, and the effectiveness of each parameter on the output models are obtained using sensitivity analyses.…”

Section: Data Processing and Modelingmentioning

confidence: 99%

Liquefaction Potential of Saturated Sand Reinforced by Cement-Grouted Micropiles: An Evolutionary Approach Based on Shaking Table Tests

et al. 2023

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Cement-grouted injections are increasingly employed as a countermeasure material against liquefaction in active seismic areas; however, there is no methodology to thoroughly and directly evaluate the liquefaction potential of saturated sand materials reinforced by the cement grout-injected micropiles. To this end, first, a series of 1 g shaking table model tests are conducted. Time histories of pore water pressures, excess pore water pressure ratios (ru), and the number of required cycles (Npeak) to liquefy the soil are obtained and modified lower and upper boundaries are suggested for the potential of liquefaction of both pure and grout-reinforced sand. Next, adopting genetic programming and the least square method in the framework of the evolutionary polynomial regression technique, high-accuracy predictive equations are developed for the estimation of rumax. Based on the results of a three-dimensional, graphical, multiple-variable parametric (MVP) analysis, and introducing the concept of the critical, boundary inclination angle, the inclination of micropiles is shown to be more effective in view of liquefaction resistivity for loose sands. Due to a lower critical boundary inclination angle, the applicability range for inclining micropiles is narrower for the medium-dense sands. MVP analyses show that the effects of a decreasing spacing ratio on decreasing rumax are amplified while micropiles are inclined.

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Section: Data Processing and Modelingmentioning

confidence: 99%

Liquefaction Potential of Saturated Sand Reinforced by Cement-Grouted Micropiles: An Evolutionary Approach Based on Shaking Table Tests

et al. 2023

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“…To predict the deformation degree of medium dense sand in engineering accurately, Li et al [26] analyzed the influencing factors and characteristics of the deformation and strength under different confining pressures. Shariatmadari et al [27] conducted true-triaxial drained and undrained tests on sand-PET (Polyethylene Terephthalate) mixtures under different confining pressure, which showed that the shear stress peak under high confining pressure is higher than that under low confining pressure obviously, and the contractive behaviors and dilatancy of the mixed sand are almost the same under the drained and undrained conditions. Krabbenhoft et al [28] conducted triaxial tests on dry sand under different confining pressures and pointed out that friction is related to stress state.…”

Section: Introductionmentioning

confidence: 99%

True‐Triaxial Drained Test of Tengger Desert Sand

et al. 2020

Advances in Civil Engineering

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For the lack of accurate test results in design and maintenance of desert-crossing highways in the Tengger Desert of western China, the GDS true-triaxial system was used to conduct the drained test on dense sand. Under the condition of different intermediate principal stress ratio b-value, the results showed that the stress-strain relationships in three orthogonal directions had significant differences, presenting significant anisotropy. The peak of the generalized shear stress increased with the increase of b-value. Except under the condition of b = 0, the specimen contracted firstly and then dilated, while the others dilated. The results of the different confining pressures showed that the stress-strain relationships appeared as a hardening type at low confining pressures, and as the confining pressure increased, the stress-strain relationships exhibit hardening, peaking, softening, and stable deformation characteristics. At low confining pressure, the contractive behaviors were not obvious, mainly as dilatancy, and as the confining pressure increased, the dilatancy increased gradually. The specimen transformed contract to dilatancy, and when the confining pressure reached 800 kPa, the specimen exhibited contractive behavior. The test results will provide data for subgrade design and construction in desert area.

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Mechanical characterization of marl soil treated by cement and lignosulfonate under freeze–thaw cycles: experimental studies and machine-learning modeling

Shafiei

Aminpour

Hasanzadehshooiili

et al. 2023

Bull Eng Geol Environ

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Effects of drainage condition on the stress-strain behavior and pore pressure buildup of sand-PET mixtures

Cited by 13 publications

References 32 publications

Liquefaction Potential of Saturated Sand Reinforced by Cement-Grouted Micropiles: An Evolutionary Approach Based on Shaking Table Tests

Liquefaction Potential of Saturated Sand Reinforced by Cement-Grouted Micropiles: An Evolutionary Approach Based on Shaking Table Tests

True‐Triaxial Drained Test of Tengger Desert Sand

Mechanical characterization of marl soil treated by cement and lignosulfonate under freeze–thaw cycles: experimental studies and machine-learning modeling

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