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

Aurimas Šiukščius, Viktoras Vorobjovas, Audrius Vaitkus, Šarūnas Mikaliūnas, Atis Zariņš

Abstract


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.

Keywords:

bearing capacity; geogrids; geosynthetics; pavement roughness; soft soil; soil reinforcement; subgrade

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References


Abu-Farsakh, M. Y., Akond, I., & Chen, Q. (2016). Evaluating the performance of geosynthetic-reinforced unpaved roads using plate load tests. International Journal of Pavement Engineering, 17(10), 901-912. https://doi.org/10.1080/10298436.2015.1031131

Cuelho, E. & Perkins, S. (2016). Mechanisms of Reinforced Benefit from Geosynthetics Used as Subgrade Stabilization, 6th European Geosynthetics Congress “EuroGeo6”: 450–461.

Cuelho, E., Perkins, S., & Morris, Z. (2014). Relative operational performance of geosynthetics used as subgrade stabilization:[project summary] (No. 7712-251/TPF-5 (251)). Montana. Dept. of Transportation. Research Programs.

ĮT APM 10 Automobilių kelių asfalto dangų priežiūrai skirtų medžiagų ir medžiagų mišinių panaudojimo ir jų sluoksnių įrengimo taisyklės (in Lithuanian)

ĮT ŽS 17 Automobilių kelių žemės darbų atlikimo ir žemės sankasos įrengimo taisyklės (in Lithuanian)

KTR 1.01:2008 Automobilių keliai (in Lithuanian)

Mehrjardi, G. T., & Khazaei, M. (2017). Scale effect on the behaviour of geogrid-reinforced soil under repeated loads. Geotextiles and Geomembranes, 45(6), 603-615. https://doi.org/10.1016/j.geotexmem.2017.08.002

Meyer, N., & Elias, J. M. (1999). Design methods for roads reinforced with multifunctional geogrid composites for subbase stabilization. Kunststoffe in de Geotechnik.

MN GEOSINT ŽD 13 Geosintetikos naudojimo žemės darbams keliuose metodiniai nurodymai (in Lithuanian)

Sakleshpur, V. A., Prezzi, M., Salgado, R., Siddiki, N. Z., & Choi, Y. S. (2019). Large-scale direct shear testing of geogrid-reinforced aggregate base over weak subgrade. International Journal of Pavement Engineering, 20(6), 649-658. https://doi.org/10.1080/10298436.2017.1321419

Šiukščius, A., Vorobjovas, V., & Vaitkus, A. (2017). Geogrid reinforced subgrade influence to ensure paved road durability. In Environmental Engineering. Proceedings of the International Conference on Environmental Engineering. ICEE (Vol. 10, pp. 1-7). Vilnius Gediminas Technical University, Department of Construction Economics & Property. https://doi.org/10.3846/enviro.2017.148

Šiukščius, A., Vorobjovas, V., & Vaitkus, A. (2018). Geogrid reinforced road subgrade influence to the pavement evenness, IOP Conference Series: Materials Science and Engineering “Resilient and Safe Road Infrastructure”: 356.

Vaitkus, A., Čygas, D., Motiejūnas, A., Pakalnis, A., & Miškinis, D. (2016). Improvement of Road Pavement Maintenance Models and Technologies. Baltic Journal of Road & Bridge Engineering, 11(3). https://doi.org/10.3846/bjrbe.2016.28

Vaitkus, A., Šiukščius, A., & Ramūnas, V. (2014). Regulations for use of geosynthetics for road embankments and subgrades. The Baltic Journal of Road and Bridge Engineering, 9(2), 88-88. https://doi.org/10.3846/bjrbe.2014.11

Valero, S., Sprague, J., & Wrigley, N. (2014). Full scale trafficking of geogrid reinforced sections under realistic service conditions, 10th International Conference on Geosynthetics “10ICG”: 212.

Vollmert, L., Emerslen, A., & Retzlaff, J. (2014). Cyclic stressing of geogrids in the working-load range of bound road constructions, 10th International Conference on Geosynthetics “10ICG”: 157.

Wallbaum, H., Busser, S., Itten, R., & Frischknecht, R. (2014). Environmental benefits by using construction methods with geosynthetics, 10th International Conference on Geosynthetics “10ICG”: 224.

Want, A., Hoff, I., & Recker, C. (2016). Geosynthetic reinforcement for road pavements in cold climate, 6th European Geosynthetics Congress “EuroGeo6”: 915–926.

Zornberg, J. G. (2017). Functions and applications of geosynthetics in roadways. Procedia engineering, 189, 298-306. ht Muradtps://doi.org/10.1016/j.proeng.2017.05.048




DOI: 10.7250/bjrbe.2019-14.449

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