Estimating of Subbase Reaction Modulus Under Rigid Pavement

International Journal of Civil Engineering

© 2025 by SSRG - IJCE Journal

Volume 12 Issue 7

Year of Publication : 2025

Authors : Tjatur Haripriambodo, Sofia W. Alisjahbana, Najid, Jack Widjajakusuma

10.14445/23488352/IJCE-V12I7P107

How to Cite?

Tjatur Haripriambodo, Sofia W. Alisjahbana, Najid, Jack Widjajakusuma, "Estimating of Subbase Reaction Modulus Under Rigid Pavement," SSRG International Journal of Civil Engineering, vol. 12,  no. 7, pp. 83-95, 2025. Crossref, https://doi.org/10.14445/23488352/IJCE-V12I7P107

Abstract:

Several points on the Indonesia toll road have found cracks in the concrete slab early, especially on toll roads with large volumes of vehicles (trucks) transporting materials and industrial products. The most common failure modes that occur in rigid pavements are fatigue cracks in the concrete slab and/or erosion of the material in the subbase. The two are linked to excessive stress and deflections in the concrete slab. Models and analytical solutions are generated from a number of studies to regulate the mechanical properties occurring in concrete pavements, especially related to stress and deflection. Subbase serves as a foundation to bear the pavement’s structure. The significant geotechnical parameters that describe the association between stress and associated settlement of subbase are the modulus of subbase reaction (k). This study aims to predict the modulus of subbase reaction by executing an in situ test. The in situ test was a test that obtained elastic modulus by implementing the Light Weight Deflectometer (LWD), predicting the modulus of subbase reaction. Other in situ research involved taking an undisturbed soil sample and testing it in a laboratory. A Triaxial test was conducted to collect the elastic modulus, and then the modulus of subbase reaction was calculated. The location of the field study was in Cikampek – Palimanan (Cipali) toll road, West Java, Indonesia. Two elastic modulus, which were obtained from LWD and Triaxial. Modulus of elasticity from LWD statistically had 15.632 MN/m2 as the average. The maximum value was 33.53 MN/m2 and 5.94 MN/m2 as the minimum value. The modulus of elasticity from Triaxial had 12.69 MN/m2 as the average. The maximum value was 19.30 MN/m2 and 8.70 MN/m2 as the minimum value. The calculated subbase reaction modulus (k) was 27.78 MN/m3 on average. The minimum value was 18.90 MN/m3, and 38.01 MN/m3 was the maximum value.

Keywords:

Elastic modulus, Rigid pavement, Subbase reaction modulus.

References:

[1] American Society of State Highway and Transportation Officials, AASHTO Guide for Design of Pavement Structures, The Association, pp. 1-600, 1993.
[Google Scholar] [Publisher Link]
[2] Nick Barounis, and J. Philpot, “Estimation of the Static Vertical Subgrade Reaction Modulus Ks from CPT for Flexible Shallow Foundations on Cohesionless Soils,” Proceeding 20th NZSEE Geotechnical Symposium Conference, pp. 1-8, 2017.
[Google Scholar] [Publisher Link]
[3] Nick Barounis et al., “Modulus of Subgrade Reaction for Foundations on Clay from Unconfined Compression Tests,” Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering, pp. 249-252, 2009.
[CrossRef] [Google Scholar] [Publisher Link]
[4] Joseph E. Bowles, Foundation Analysis and Design, 5th ed., McGraw-Hill, pp. 1-1175, 1997.
[Google Scholar] [Publisher Link]
[5] Mostafa Yousefi Darestani et al., “Dynamic Response of Concrete Pavements under Vehicular Loads,” IABSE Symposium: Responding to Tomorrow's Challenges in Structural Engineering, Budapest, Hungary, pp. 59-66, 2006.
[CrossRef] [Google Scholar] [Publisher Link]
[6] Braja M. Das, Principles of Geotechnical Engineering, Cengage Learning, pp. 1-666, 2010.
[Google Scholar] [Publisher Link]
[7] Ahelah Alaa Jawad, “Assessment of Modulus of Subgrade Reaction of Different Soils Using Light Weight Deflectometer,” Master Thesis, University of Kerbala, pp. 1-163, 2016.
[Publisher Link]
[8] S.A. Naeini et al., “Prediction of Subgrade Reaction Modulus of Clayey Soil using Group Method of Data Handling,” Scientia Iranica, vol. 27, no. 4, pp. 1740-1750, 2020.
[CrossRef] [Google Scholar] [Publisher Link]
[9] Y.H. Parjoko, “Sensitivity Analysis of Concrete Performance Using Finite Element Approach,” Journal of the Civil Engineering Forum, vol. 21, no. 1, pp. 1171-1182, 2012.
[CrossRef] [Google Scholar] [Publisher Link]
[10] Bagus Hario Setiadji, and T.F. FWA, “Estimating Modulus of Subgrade Reaction for Rigid Pavement Design,” Journal of the Eastern Asia Society for Transportation Studies, vol. 8, pp. 1502-1512, 2010.
[CrossRef] [Google Scholar] [Publisher Link]
[11] Vishwas Sawant, “Dynamic Analysis of Rigid Pavement with Vehicle–Pavement Interaction,” International Journal of Pavement Engineering, vol. 10, no. 1, pp. 63-72, 2009.
[CrossRef] [Google Scholar] [Publisher Link]
[12] Oustasse Abdoulaye Sall et al., “Influence of the Elastic Modulus of the Soil and Concrete Foundation on the Displacements of a Mat Foundation,” Open Journal of Civil Engineering, vol. 3, no. 4, pp. 228-233, 2013.
[CrossRef] [Google Scholar] [Publisher Link]
[13] Matylda Tankiewicz, and Magdalena Kowalska, “Stiffness Moduli in Triaxial Tests on a Loess-Sand Mixture,” E3S Web of Conference Proceeding of the 8th International Symposium on Deformation Characteristics of Geomaterials (IS-Porto 2023), vol. 544, 2024.
[CrossRef] [Google Scholar] [Publisher Link]
[14] Hana Hussin Adem, “Modulus of Elasticity Based Method for Estimating the Vertical Movement of Natural Unsaturated Expansive Soils,” Thesis of Doctor of Philosophy, University of Ottawa, pp. 1-267, 2015.
[CrossRef] [Google Scholar] [Publisher Link]