Influence of Geogrid Properties on Rutting and Stress Distribution in Reinforced Flexible Pavements under Repetitive Wheel Loading

Baadiga, Ramu; Balunaini, Umashankar; Saride, Sireesh; Madhav, Madhira R.

doi:10.1061/(asce)mt.1943-5533.0003972

Cited by 19 publications

(5 citation statements)

References 29 publications

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“…An important application of geogrid in the case of pavement is to reduce rut deformation by 90% as compared to unreinforced pavement. Rut deformation in pavements generally occurs due to repetitive wheel loading (Baadiga et al 2021). Geogrid used as a facing material for stabilization of nailed slope, where deformation is reduced by PET geogrid facing slope as compared to slope without facing (Nar et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Importance of PET geogrid in the enhancement of hill slope's safety factor: a finite element approach

Samal

Sahoo

2023

Eng. Res. Express

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Slope stability analysis is crucial since the instability of the slope contributes to the failure of many buildings in hilly areas. Numerous ground improvement techniques are used to address this issue, including vertical drains, grouting, soil replacement, geosynthetic reinforcement, and piling. Geosynthetics are used more frequently to stabilize the hill slope as an alternative and cost-effective approach. The behavior of a geogrid reinforced slope was investigated in the current work utilizing 3D numerical analyses using the finite element program MIDAS GTS NX 2021 v1.1. Five types of geogrid are made up of different materials such as Polyethylene Terephthalate (PET), High-Density Polyethylene (HDPE), Low-Density Polyethylene (LDPE), Polypropylene (PP), and Polyvinyl Chloride (PVC) were considered to stabilize the slope. The percentage Increase in Factor of safety for PET, HDPE, LDPE, PVC and PP Geogrid reinforced slopes are 18 %, 17.1%, 16.7%, 15.6% and 16.3% respectively as compared to Unreinforced slope. The percentage decrease in deformations for PET, HDPE, LDPE, PVC and PP Geogrid reinforced slopes are 97%, 78.4%, 64.79%, 78.17% and 49% respectively as compared to Unreinforced slope. The PET geogrid reinforced Slope provides a higher factor of safety and lower deformation among other geogrid reinforced Slopes because PET geogrid provides maximum pull-out resistance among different types of geogrid. Similarly, the strain induced in PET geogrid-reinforced slope is minimum among other geogrid-reinforced Slopes due to the lower stiffness of PET geogrid. Hence the slope reinforced with PET geogrid performed well compared to different geogrid-reinforced slopes.

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Section: Introductionmentioning

confidence: 99%

Importance of PET geogrid in the enhancement of hill slope's safety factor: a finite element approach

Samal

Sahoo

2023

Eng. Res. Express

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“…7. Bearing pressure vs. settlement ratio of pavements reinforced with various geogrid axial stiffness Load improvement factor is defined as the ratio between the bearing pressure under the footing of the reinforced section to that of the unreinforced section under the same settlement [32,33]. Table 3 shows the load improvement factor for various reinforcement axial stiffness.…”

Section: Effect Of Axial Stiffness Of Geogridmentioning

confidence: 99%

Three-Dimensional Analysis of Geogrid Reinforced Flexible Pavement Using Finite Difference Program Flac3d

Rojimol¹

2022

GEOMATE

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India ranks second after the United States in terms of road infrastructure. In recent years, geosynthetics have created an impact on enhancing the life of the pavement. Numerous studies have been done on the application of geosynthetics on the flexible pavement to reduce rutting deformations and fatigue cracks. Laboratory and field studies have cost and time constraints. These limitations can be overcome by making use of numerical models. This research focuses on the numerical analysis of biaxial geogrids in flexible pavement. Proper knowledge of geogrid-pavement layer interaction is essential to obtain an understanding of strains, stresses, and deflections in pavement layers. In this study, a three-dimensional model of the geogrid reinforced unpaved road is developed using the finite difference program -FLAC 3D . Appropriate constitutive models are selected for the pavement layers. Geogrid is modeled using a linear elastic 'geogrid' element in FLAC 3D . The thickness of pavement layers in the analysis is taken as per the codal provisions of IRC: 37-2012. For pavements underlain by weak subgrade, the study shows that geogrid is more efficient in resisting the loads for settlement ratios higher than 2%. Based on the results from the numerical model, the optimal location of geogrid is proposed at one-third base thickness from the top of the surface of the pavement. This study is useful for construction sites where competent aggregates are not available and subgrade CBR is less than 5%.

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“…The use of geogrids in pavements as reinforcement for pavement layers provides lateral restraint that supports the base and subbase material, this type of reinforcement can help reduce the thickness of the aggregate layer [4]. Moreover, the use of geogrids offers several benefits such as the improvement of surface deformation characteristics to arrest downward deflections, the increase of bearing capacity and the control of the rutting of pavements under traffic loads when it is used in soft subgrades, and the increment of the pavement's service life arresting longitudinal cracks [4]- [6]. However, the available conventional methods such as cement or lime stabilization or fiber reinforcement consume a lot of time and money, which is why several studies have demonstrated that its use is an economic, ecological, and easy-to-construct alternative to traditional techniques.…”

Section: Introductionmentioning

confidence: 99%

Influence of geogrid arrangement on the bearing capacity of a granular soil on physical models and its comparison to theoretical equations

Albuja-Sánchez,

Cóndor,

Oñate

et al. 2023

Preprint

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This study presents an analysis of the influence of geogrid distribution on the bearing capacity of granular soils. For this purpose, the bearing capacity is compared based on 3 arrangements, uniform, trapezoidal, and inverted trapezoidal, with 2 types of geogrids, biaxial and multiaxial, under the application of an axial load. The tests performed were analyzed in three forms in which the trapezoidal distribution was the best arrangement for biaxial and multiaxial geogrids. The first analysis considers the peaks for each stress-strain curve, the trapezoidal distribution increases the bearing capacity by 36% and 33% for biaxial and multiaxial geogrids, respectively. The second analysis considers an s/B ratio of 10%, which had an average increment of 30.5% for the two types of geogrids. The third analysis considers a 20% of s/B ratio, which showed a 56% and 81% of BCR increase for biaxial and multiaxial geogrids respectively. From an economical and environmental analysis, the trapezoidal distribution saves 7% of material compared to the traditional uniform distribution. The comparison between physical and numerical models with theoretical equations is presented.

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Influence of Geogrid Properties on Rutting and Stress Distribution in Reinforced Flexible Pavements under Repetitive Wheel Loading

Cited by 19 publications

References 29 publications

Importance of PET geogrid in the enhancement of hill slope's safety factor: a finite element approach

Importance of PET geogrid in the enhancement of hill slope's safety factor: a finite element approach

Three-Dimensional Analysis of Geogrid Reinforced Flexible Pavement Using Finite Difference Program Flac3d

Influence of geogrid arrangement on the bearing capacity of a granular soil on physical models and its comparison to theoretical equations

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