Geogrid reinforced road subgrade influence on the pavement evenness

Šiukščius, Aurimas; Vorobjovas, Viktoras; Vaitkus, Audrius

doi:10.1088/1757-899x/356/1/012020

Cited by 2 publications

(2 citation statements)

References 2 publications

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“…To be able to get more reliable results, two different categories of roads were selected for the examination when estimating the geogrid influence on the pavement roughness (Šiukščius, Vorobjovas, & Vaitkus, 2018). The first road was the main road A6 Kaunas-Zarasai-Daugpilis (tested sections 66.20-68.76 km and 137.35-142.00 km).…”

Section: Tested Road Sections and Designed Solutionsmentioning

confidence: 99%

Long Term Behaviour of An Asphalt Pavement Structure Constructed on a Geogrid-Reinforced Subgrade Over Soft Soils

Šiukščius

Vorobjovas

Vaitkus

et al. 2019

BJRBE

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Many roads with asphalt pavement are being reconstructed every year, as their quality becomes insufficient by the requirements. As it is well- known, old roads were built not in the very best quality, so doing reconstruction projects in the most cases there were required to deal with soft soils that are under the existing road structure. Geogrid reinforcement was widely used to solve issues of soft soil in Lithuania. There are projects where geogrid reinforcement is used to control road pavement roughness when there are layers of peat or silt under road structure instead of using concrete piles or geosynthetic-encased soil columns. This type of geogrid reinforcement application is unexplained in any normative-technical document but widely used in Lithuania. This application was usually made constructively without any calculations, choosing the reinforced solution by reducing the geogrid tensile strength or layer quantity compared to reinforced load transfer platform over piles. This paper evaluates the long-term influence of geogrid- reinforced subgrade on the roughness of asphalt surfacing and bearing capacity of the road structure when the soft peaty soils stratify in the deeper layers of the subgrade. There were compared the reinforced sections to adjacent sections to see the effect and fortunately a large number of adjacent sections were also strengthened, mostly by lime stabilisation. Therefore, this comparison allows making more insights on the long-term performance of the strengthened subgrade and influence on the road quality. This research gives recommendations on how the geogrids has to be selected to be used in this kind of application.

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Section: Tested Road Sections and Designed Solutionsmentioning

confidence: 99%

Long Term Behaviour of An Asphalt Pavement Structure Constructed on a Geogrid-Reinforced Subgrade Over Soft Soils

Šiukščius

Vorobjovas

Vaitkus

et al. 2019

BJRBE

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“…To attain this goal, experimental programming was planned and conducted on the treated and untreated samples of two types of soils: collapsing silty-sand soil and poor fine-sand soil. Whereas Šiukščius et al [13] used the geogrid for the application of road subgrade stabilization for pavement evenness. A load load test on stabilized peat subgrade was investigated in the field using geogrid reinforcement within the gravel fills, as stated by Jarrett [14].…”

Section: Introductionmentioning

confidence: 99%

Utilization of Sand Cushion for Stabilization of Peat Layer Considering Dynamic Response of Compaction

Basha,

Azzam,

Elsiragy

2024

Civ Eng J

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Soft peat soils are located in many zones and at a given depth all over the world and are characterized by their low shear strength and high settlement. It can also cause progressive failure of roads, embankments, and foundations. Sand cushioning is the most beneficial technique used to relieve the stress transmitted to the peat layer to mitigate any deformation and shear failure. In this research, a field study of a road with a soft peat layer located at a depth 4m below the ground surface is carried out. The plate load test is conducted on three cases over the peat layer using sand cushions with and without reinforcement. The results were compared with plate footing on the surface of the road without stabilization. The field tests of the improved technique were verified and deeply analyzed using the numerical program Plaxis. The finite element analysis mainly sheds light on the simulation of the dynamic response that represents the compaction of the sand cushion over the peat layer. A series of numerical models has been done considering the effect of repeated load compaction on the adopted sand cushions with and without reinforcement. The numerical analysis is directed to show the effect of repeated loads of compaction equipment that were used on decreasing the stress over the peat layer. The results showed that the composite compacted cushion with both a higher number of cycles and stress has a great effect on relieving the stresses transmitted to the face of the peat. As a result, the footing capacity is increased with less deformation. Doi: 10.28991/CEJ-2024-010-04-011 Full Text: PDF

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Geogrid reinforced road subgrade influence on the pavement evenness

Cited by 2 publications

References 2 publications

Long Term Behaviour of An Asphalt Pavement Structure Constructed on a Geogrid-Reinforced Subgrade Over Soft Soils

Long Term Behaviour of An Asphalt Pavement Structure Constructed on a Geogrid-Reinforced Subgrade Over Soft Soils

Utilization of Sand Cushion for Stabilization of Peat Layer Considering Dynamic Response of Compaction

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