Effects of Backfill Constitutive Behavior and Soil–Geotextile Interface Properties on Deformations of Geosynthetic-Reinforced Soil Piers under Static Axial Loading
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 146, Issue 9
Abstract
In this research, a numerical investigation was conducted to study the effects of backfill constitutive behavior on the vertical and horizontal deformations of geosynthetic-reinforced soil (GRS) piers under static axial loads. A finite-difference program was used to model full-scale GRS piers. The backfill soil was simulated using three constitutive models: the elastic-perfectly-plastic Mohr-Coulomb model, the plastic-hardening model, and the plastic-hardening model combined with strain-softening behavior. The results showed that the deformation response of GRS piers under service loads is satisfactorily predicted by the plastic-hardening model. At ultimate failure loads, however, only the model accounting for the plastic-hardening and the strain-softening behaviors was judged to reasonably capture the behavior of GRS piers. The relative displacement of soil and geotextile at the soil–geotextile interface was also investigated. The results showed that under working conditions with small applied load, there is no sliding between the soil and geotextile; however, as the load increases, sliding is first initiated at the corners of the pier and progressively mobilized toward the center of the pier. A parametric study on the effects of soil–geotextile interface properties on the deformation behavior of GRS piers under axial loading was also conducted using the validated plastic-hardening model combined with strain-softening behavior. It was found that increasing the interface friction angle decreases the settlement of GRS piers when the axial strain is greater than 2% for piers with a concrete masonry unit (CMU) facing and 4% for piers without CMU facing. The results suggest that when calibrating the interface friction angle (or cohesion), the postyielding response of GRS pier should be used.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request. These data include FLAC3D input files and the simulation results used to generate all figures.
Acknowledgments
Support of this study is provided by the Federal Highway Administration (FHWA) under Contract No. DTFH6114C00012. This support is gratefully acknowledged. The authors thank Mike Adams of the FHWA, who provided valuable input in the research. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and not necessarily the views of the FHWA.
References
Abdi, M. R., and H. Mirzaeifar. 2017. “Experimental and PIV evaluation of grain size and distribution on soil–geogrid interactions in pullout test.” Soils Found. 57 (6): 1045–1058. https://doi.org/10.1016/j.sandf.2017.08.030.
Adam, M., and J. Nicks. 2018. Design and construction guidelines for geosynthetic reinforced soil abutments and integrated bridge systems. Washington, DC: Federal Highway Administration.
Adams, M., J. Nicks, T. Stabile, J. T. Wu, W. Schlatter, and J. Hartmann. 2011. Geosynthetic reinforced soil integrated bridge system synthesis report. McLean, VA: Federal Highway Administration.
Adams, M. T., K. Ketchart, and J. T. Wu. 2007. “Mini pier experiments—Geosynthetic reinforcement spacing and strength as related to performance.” In Proc., Geosynthetics in Reinforcement and Hydraulic Applications. Reston, VA: ASCE. https://doi.org/10.1061/40909(228)10.
Allen, T. M., and R. J. Bathurst. 2015. “Improved simplified method for prediction of loads in reinforced soil walls.” J. Geotech. Geoenviron. Eng. 141 (11): 04015049. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001355.
Allen, T. M., and R. J. Bathurst. 2019. “Geosynthetic reinforcement stiffness characterization for MSE wall design.” Geosynthetics Int. 26 (6): 592–610. https://doi.org/10.1680/jgein.19.00041.
Allen, T. M., R. J. Bathurst, R. D. Holtz, D. Walters, and W. F. Lee. 2003. “A new working stress method for prediction of reinforcement loads in geosynthetic walls.” Can. Geotech. J. 40 (5): 976–994. https://doi.org/10.1139/t03-051.
Ardah, A., M. Abu-Farsakh, and G. Voyiadjis. 2017. “Numerical evaluation of the performance of a geosynthetic reinforced soil-integrated bridge system (GRS-IBS) under different loading conditions.” Geotext. Geomembr. 45 (6): 558–569. https://doi.org/10.1016/j.geotexmem.2017.07.005.
ASTM. 2011. Standard test method for direct shear test of soils under consolidated drained conditions (withdrawn 2020). ASTM D3080/D3080M. West Conshohocken, PA: ASTM.
ASTM. 2017. Standard test method for tensile properties of geotextiles by the wide-width strip method. ASTM D4595. West Conshohocken, PA: ASTM.
Bathurst, R. J., N. Vlachopoulos, D. L. Walters, P. G. Burgess, and T. M. Allen. 2006. “The influence of facing stiffness on the performance of two geosynthetic reinforced soil retaining walls.” Can. Geotech. J. 43 (12): 1225–1237. https://doi.org/10.1139/t06-076.
Boscardin, M. D., E. T. Selig, R. S. Lin, and G. R. Yang. 1990. “Hyperbolic parameters for compacted soils.” J. Geotech. Eng. 116 (1): 88–104. https://doi.org/10.1061/(ASCE)0733-9410(1990)116:1(88).
Duncan, J. M., P. Byrne, K. S. Wong, and P. Mabry. 1980. Strength, stress-strain and bulk modulus parameters for finite-element analysis of stresses and movements in soil masses. Berkeley, CA: Dept. of Civil Engineering, Univ. of California.
Duncan, J. M., and C. Y. Chang. 1970. “Nonlinear analysis of stress and strain in soils.” J. Soil Mech. Found. Div. 96 (5): 1629–1653.
Gu, J. 2011. “Computational modeling of geogrid reinforced soil foundation and geogrid reinforced base in flexible pavement.” Ph.D. dissertation, Dept. of Civil and Environmental Engineering, Louisiana State Univ.
Hatami, K., and R. J. Bathurst. 2005a. “Development and verification of a numerical model for the analysis of geosynthetic-reinforced soil segmental walls under working stress conditions.” Can. Geotech. J. 42 (4): 1066–1085. https://doi.org/10.1139/t05-040.
Hatami, K., and R. J. Bathurst. 2005b. “Verification of a numerical model for reinforced soil segmental retaining walls.” In Proc., Slopes and Retaining Structures under Static and Seismic Conditions. Reston, VA: ASCE. https://doi.org/10.1061/40787(166)9.
Hatami, K., and R. J. Bathurst. 2006. “Numerical model for reinforced soil segmental walls under surcharge loading.” J. Geotech. Geoenviron. Eng. 132 (6): 673–684. https://doi.org/10.1061/(ASCE)1090-0241(2006)132:6(673).
Hegde, A. M., and T. G. Sitharam. 2015. “Experimental and numerical studies on protection of buried pipelines and underground utilities using geocells.” Geotext. Geomembr. 43 (5): 372–381. https://doi.org/10.1016/j.geotexmem.2015.04.010.
Helwany, S. M., J. T. Wu, and A. Kitsabunnarat. 2007. “Simulating the behavior of GRS bridge abutments.” J. Geotech. Geoenviron. Eng. 133 (10): 1229–1240. https://doi.org/10.1061/(ASCE)1090-0241(2007)133:10(1229).
Huang, B., R. J. Bathurst, and K. Hatami. 2009. “Numerical study of reinforced soil segmental walls using three different constitutive soil models.” J. Geotech. Geoenviron. Eng. 135 (10): 1486–1498. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000092.
Itasca. 2017. Fast Lagrangian analysis of continua (FLAC), version 6.0. Minneapolis, MN: Itasca Consulting Group, Inc.
Ketchart, K., and J. T. H. Wu. 1997. “Performance of geosynthetic-reinforced soil bridge pier and abutment, Denver, Colorado, USA.” In Mechanically Stabilized Backfill, 101–116. Rotterdam, Netherlands: A.A. Balkema.
Khosrojerdi, M., M. Xiao, T. Qiu, and J. Nicks. 2019. “Nonlinear equation for predicting the settlement of reinforced soil foundations.” J. Geotech. Geoenviron. Eng. 145 (5): 04019013. https://doi.org/10.1061/(ASCE)GT.1943-5606.0002027.
Kost, A. D., G. M. Filz, T. Cousins, and M. C. Brown. 2014. “Full-scale investigation of differential settlements beneath a geosynthetic-reinforced soil bridge abutment.” Transp. Res. Rec. 2462 (1): 28–36. https://doi.org/10.3141/2462-04.
Lade, P. V., and M. K. Kim. 1988. “Single hardening constitutive model for frictional materials. III: Comparisons with experimental data.” Comput. Geotech. 6 (1): 31–47. https://doi.org/10.1016/0266-352X(88)90054-7.
Ling, H. I. 2005. “Finite element applications to reinforced soil retaining walls—Simplistic versus sophisticated analyses.” In Proc., Geomechanics: Testing, Modeling, and Simulation, 217–236. Reston, VA: ASCE.
Ling, H. I., and H. Liu. 2003. “Pressure-level dependency and densification behavior of sand through generalized plasticity model.” J. Eng. Mech. 129 (8): 851–860. https://doi.org/10.1061/(ASCE)0733-9399(2003)129:8(851).
Ling, H. I., and H. Liu. 2009. “Deformation analysis of reinforced soil retaining walls—Simplistic versus sophisticated finite element analyses.” Acta Geotech. 4 (3): 203–213. https://doi.org/10.1007/s11440-009-0091-6.
Ling, H. I., S. Yang, D. Leshchinsky, H. Liu, and C. Burke. 2010. “Finite element simulations of full-scale modular block reinforced soil retaining walls under earthquake loading.” J. Eng. Mech. 136 (5): 653–661. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000108.
Nicks, J. E., M. T. Adams, P. S. K. Ooi, and T. Stabile. 2013. Geosynthetic reinforced soil performance testing—Axial load deformation relationships. McLean, VA: Federal Highway Administration.
Pastor, M., O. C. Zienkiewicz, and A. H. C. Chan. 1990. “Generalized plasticity and the modelling of soil behavior.” Int. J. Numer. Anal. Methods Geomech. 14 (3): 151–190. https://doi.org/10.1002/nag.1610140302.
Perkins, S. W., and E. V. Cuelho. 1999. “Soil-geosynthetic interface strength and stiffness relationships from pullout tests.” Geosynthetics Int. 6 (5): 321–346. https://doi.org/10.1680/gein.6.0156.
Pham, H. T., T. S. Muhannad, and J. W. David. 2004. “Numerical analysis of geosynthetic-rammed aggregate pier supported embankments.” In Proc., Geotechnical Engineering for Transportation Projects, 657–664. Reston, VA: ASCE.
Schanz, T., and P. A. Vermeer. 1998. “On the stiffness of sands.” In Vol. 48 of Géotechnique: Pre-failure Deformation Behaviour of Geomaterials, 383–387. London: Thomas Telford.
Schanz, T., P. A. Vermeer, and P. G. Bonnier. 1999. “The hardening soil model: Formulation and verification.” In Beyond 2000 in computational geotechnics, 281–296. Rotterdam, Netherlands: A.A. Balkema.
Tajiri, N., H. Sasaki, J. Nishimura, Y. Ochiai, and K. Dobashi. 1996. “Full-scale failure experiments of geotextile-reinforced soil walls with different facings.” In Proc., IS-Kyushu 96, 525–530. Rotterdam, Netherlands: A.A. Balkema.
Talebi, M., C. L. Meehan, D. V. Cacciola, and M. L. Becker. 2014. “Design and construction of a geosynthetic reinforced soil integrated bridge system.” In Proc., Geo-Congress 2014: Geo-characterization and Modeling for Sustainability. Reston, VA: ASCE. https://doi.org/10.1061/9780784413272.406.
Walters, D. L., T. M. Allen, and R. J. Bathurst. 2002. “Conversion of geosynthetic strain to load using reinforcement stiffness.” Geosynthetics Int. 9 (5–6): 483–523. https://doi.org/10.1680/gein.9.0226.
Zheng, Y., and P. J. Fox. 2016. “Numerical investigation of geosynthetic-reinforced soil bridge abutments under static loading.” J. Geotech. Geoenviron. Eng. 142 (5): 04016004. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001452.
Zheng, Y., and P. J. Fox. 2017. “Numerical investigation of the geosynthetic reinforced soil–integrated bridge system under static loading.” J. Geotech. Geoenviron. Eng. 143 (6): 04017008. https://doi.org/10.1061/(ASCE)GT.1943-5606.0001665.
Zheng, Y., P. J. Fox, and J. S. McCartney. 2018. “Numerical simulation of the deformation response of geosynthetic reinforced soil mini-piers.” Geosynthetics Int. 25 (3): 271–286. https://doi.org/10.1680/jgein.18.00007.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 146 • Issue 9 • September 2020
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©2020 American Society of Civil Engineers.
History
Received: May 22, 2019
Accepted: Mar 17, 2020
Published online: Jun 17, 2020
Published in print: Sep 1, 2020
Discussion open until: Nov 17, 2020
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