Analytical solution for calculation of pull out force-deformation of geosynthetics reinforcing unsaturated soils

Ghazavi, Mahmoud; Bavandpouri, Omid

doi:10.1016/j.geotexmem.2021.12.005

Cited by 12 publications

(5 citation statements)

References 98 publications

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“…However, geosynthetics interface testing is expensive and time consuming, and the exact materials to be deployed on site are often chosen well after the design stage, thus, there is a clear need to develop an effective method to predict the peak shear strength of soil-geomembrane according to the typical charaterics of soil and geomembrane. Hence, based on the results of direct shear tests, a number of researchers have attempted to develop prediction models to evaluate the peak shear strength of soilgeomembrane interfaces by taking the aforementioned important parameters of soil and geomembrane as the input parameters (Ghazavi and Bavandpouri, 2022;Pant and Ramana, 2022;Raja and Shukla, 2021). However, due to the complicated action mechanism between soil and geomembrane as well as the large number of influence factors, most of the forecasting models established by adopting traditional function fitting or analytical methods cannot comprehensively reflect the impacts of multiple factors on the peak shear strength along soil-geomembrane interfaces .…”

Section: Introductionmentioning

confidence: 99%

Artificial intelligence algorithms for predicting peak shear strength of clayey soil-geomembrane interfaces and experimental validation

Chao

Shi²,

Fowmes³

et al. 2023

Geotextiles and Geomembranes

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Section: Introductionmentioning

confidence: 99%

Artificial intelligence algorithms for predicting peak shear strength of clayey soil-geomembrane interfaces and experimental validation

Chao

Shi²,

Fowmes³

et al. 2023

Geotextiles and Geomembranes

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“…At the same time, it is suggested by much of the literature that alterations in matrix suction also impact the strength of reinforced soils. Ghazavi et al (Bergado et al, 1993;Mahmoud and Omid, 2021) conducted a study on the impact of moisture content on peak pullout force through pullout tests. The findings indicate that there was a substantial reduction in the peak pullout force as the moisture content escalated.…”

Section: Introductionmentioning

confidence: 99%

Effect of matrix suction on the shear strength characteristics of reinforced granite residual soil

Deng,

Zhu,

Lin

et al. 2023

Front. Mater.

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Introduction: The soil in geogrid-reinforced structures is typically unsaturated, with the shear strength provided by both the matrix suction and the reinforced body. Traditional structural designs for saturated soils only consider the shear strength provided by the reinforced body, neglecting the part provided by matrix suction. As a result, the design for reinforced structures is biased toward conservatism.Method: The study examined the matrix suction-provided shear strength in reinforced soils through strain-controlled triaxial and soil-water characteristic curve (SWCC) pressure plate instrumentation. The feasibility of the Schrefler and Khalili unsaturated soil shear strength formulas for predicting shear strength based on matrix suction forces was verified.Results: The study revealed that the cohesion of saturated reinforced soil exhibits a significant decrease in contrast with unsaturated reinforced soil, with matrix suction serving as a crucial consideration for reinforced structure design.Discussion: The experimental results confirm the suitability of applying the quasi-cohesion increment theory to reinforced clays. The Khalili formula can be utilized to predict the quasi cohesion of unsaturated reinforced soils with greater accuracy under diverse dry density conditions. The results obtained using post-shear moisture content were closer to the measured values than those using initial moisture content.

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“…In recent decades, geosynthetics have been adopted more frequently, as in civil engineering [1,2], transportation engineering [3,4], hydraulic engineering [5], and other fields, because they have excellent engineering characteristics, such as low cost [6,7], simple construction [8,9], better seismic [10], seepage-stability [11], stability [12] and performance and deformation coordination [13,14]. The geocell is an important new type of geosynthetic reinforcement [15] material that is free to expand and contract.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Slit on the Mechanical Tearing Behavior of High-Density Polyethylene and Polyester Geocell Strips

Zuo,

Hao,

et al. 2023

Sustainability

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Geocells are widely applied in numerous infrastructure constructions, like heavy-haul railways and ports. The mechanical tearing behavior of a geocell strip is crucial to the stability of the geocell-reinforced soil structures. At present, extensive studies have been conducted on the tensile characteristics of geocell strips, while limited research has been performed to investigate the post-damage mechanical tearing behavior of geocell strips. Meanwhile, there is also a lack of research on the comparison of performance of strips before and after damage. In this paper, a series of trapezoidal tearing tests were performed on high-density polyethylene (HDPE) and polyester (PET) geocell strips. The tearing test results and failure mode of trapezoidal specimens with a slit were investigated, and the effect of the slit on the strength and deformation characteristics of the specimen were discussed by introducing the “damage ratio of tearing force (RTF)” and “damage ratio of tearing displacement (RTD)”. In addition, the mechanical tearing behavior of HDPE and PET trapezoidal specimens was also compared. The test results indicated that the failure mode of HDPE and PET specimens subjected to tearing force was ductile and brittle failure. The strength and deformation characteristics of post-damage HDPE and PET trapezoidal specimens decreased. The slit had a significant impact on the tearing displacement of HDPE and PET specimens, especially the post-peak tearing displacement. The post-peak tearing displacement of HDPE was 10.99 times that of PET. The peak tearing force of the HDPE specimen without the slit was about 1.61 times that of specimen with the slit. Before local tearing, the peak tearing force of the PET specimen without the slit was about 3.27 times that of the specimen with the slit. The strength damage to the HDPE and PET geocell strips caused by the slit was 38.0%, and 69.46%. The impact of the slit on the tearing force of the PET specimen was greater than that of the HDPE, and was 1.82 times for the HDPE. This study can enhance our understanding of the mechanical tearing behavior of the geocell strip after damage and develop effective mitigation measures.

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Analytical solution for calculation of pull out force-deformation of geosynthetics reinforcing unsaturated soils

Cited by 12 publications

References 98 publications

Artificial intelligence algorithms for predicting peak shear strength of clayey soil-geomembrane interfaces and experimental validation

Artificial intelligence algorithms for predicting peak shear strength of clayey soil-geomembrane interfaces and experimental validation

Effect of matrix suction on the shear strength characteristics of reinforced granite residual soil

Effect of the Slit on the Mechanical Tearing Behavior of High-Density Polyethylene and Polyester Geocell Strips

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