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Numerical Evaluation of Geogrid-Reinforced Two-Layer Soil System with Plate Load Test
https://orcid.org/http://orcid.org/0000-0001-8127-7797
This study aims to develop a finite element model (FEM) of a plate load test (PLT) to evaluate the performance of a geogrid-reinforced two-layer soil system. The PLT with a reinforced base over a soft subgrade is replicated with a two-dimensional (2D) axisymmetric FEM with a size of a 4-m radius and a 4.4-m depth after a rigorous testing for appropriate dimensions. The critical responses of the performance of the two-layer soil system such as the vertical surface deformation and compressive strains and stresses at the top of the subgrade are estimated numerically from a commercially available FEM program. The developed model is verified by benchmarking with a published data from literature, and the results are found to be in good agreement. The PLT deflection results are used to estimate the modulus of the subgrade reaction for an unbound base over the soft subgrade. The numerical results show that the performance of the geogrid-reinforced two-layer soil system is enhanced with an increase in the modulus of the subgrade reaction by a factor of 1.3 with a relative deformation ratio of up to 34% due to the impact of the degradation of the modulus ratio and the angle of stress distribution, effects of cyclic loading and the influence of the granular base layer’s thickness. Regarding the improvement in the bearing capacity, the results show that it increases by a factor of around 1.06, and hence is considered nominal and not effective to use the soft geogrid reinforcement.
Numerical Evaluation of Geogrid-Reinforced Two-Layer Soil System with Plate Load Test
https://orcid.org/http://orcid.org/0000-0001-8127-7797
This study aims to develop a finite element model (FEM) of a plate load test (PLT) to evaluate the performance of a geogrid-reinforced two-layer soil system. The PLT with a reinforced base over a soft subgrade is replicated with a two-dimensional (2D) axisymmetric FEM with a size of a 4-m radius and a 4.4-m depth after a rigorous testing for appropriate dimensions. The critical responses of the performance of the two-layer soil system such as the vertical surface deformation and compressive strains and stresses at the top of the subgrade are estimated numerically from a commercially available FEM program. The developed model is verified by benchmarking with a published data from literature, and the results are found to be in good agreement. The PLT deflection results are used to estimate the modulus of the subgrade reaction for an unbound base over the soft subgrade. The numerical results show that the performance of the geogrid-reinforced two-layer soil system is enhanced with an increase in the modulus of the subgrade reaction by a factor of 1.3 with a relative deformation ratio of up to 34% due to the impact of the degradation of the modulus ratio and the angle of stress distribution, effects of cyclic loading and the influence of the granular base layer’s thickness. Regarding the improvement in the bearing capacity, the results show that it increases by a factor of around 1.06, and hence is considered nominal and not effective to use the soft geogrid reinforcement.
Numerical Evaluation of Geogrid-Reinforced Two-Layer Soil System with Plate Load Test
https://orcid.org/http://orcid.org/0000-0001-8127-7797
This study aims to develop a finite element model (FEM) of a plate load test (PLT) to evaluate the performance of a geogrid-reinforced two-layer soil system. The PLT with a reinforced base over a soft subgrade is replicated with a two-dimensional (2D) axisymmetric FEM with a size of a 4-m radius and a 4.4-m depth after a rigorous testing for appropriate dimensions. The critical responses of the performance of the two-layer soil system such as the vertical surface deformation and compressive strains and stresses at the top of the subgrade are estimated numerically from a commercially available FEM program. The developed model is verified by benchmarking with a published data from literature, and the results are found to be in good agreement. The PLT deflection results are used to estimate the modulus of the subgrade reaction for an unbound base over the soft subgrade. The numerical results show that the performance of the geogrid-reinforced two-layer soil system is enhanced with an increase in the modulus of the subgrade reaction by a factor of 1.3 with a relative deformation ratio of up to 34% due to the impact of the degradation of the modulus ratio and the angle of stress distribution, effects of cyclic loading and the influence of the granular base layer’s thickness. Regarding the improvement in the bearing capacity, the results show that it increases by a factor of around 1.06, and hence is considered nominal and not effective to use the soft geogrid reinforcement.
Numerical Evaluation of Geogrid-Reinforced Two-Layer Soil System with Plate Load Test
Transp. Infrastruct. Geotech.
Chua, Boon Tiong (author) / Nepal, Kali Prasad (author)
2025-01-01
Article (Journal)
Electronic Resource
English
Numerical Evaluation of Geogrid-Reinforced Two-Layer Soil System with Plate Load Test
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