Abstract
The geosynthetics–sand–clay layered reinforced (GSCLR) structure has wide application prospects due to its massive adoption of the clay. To date, the coordination between the geosynthetics, sand, and clay is not thorough enough. In light of this, a series of discrete element method models were established for the pullout behavior of a GSCLR structure. The mesoscopic parameters such as the displacement vector, the contact force chain, and the local porosity were analyzed, and the mechanism for the load transfer between the geogrid, sand layer, and clay layer was examined. The thickness and porosity of the sand layer were also considered as the variables. The effects of the various factors on the strength index of the geogrid–sand interface were analyzed. The results showed obvious differences in the movement trend and mesoscopic parameters changes of the sand and clay layer in different regions. The thickness of the shear bands generated in the sand layer was affected by the upper and lower clay layers. At the same pullout displacement, the ultimate pullout resistance of the GSCLR structure did not enlarge continuously with an increase in the thickness of the sand layer, and there was an optimal thickness of the sand layer.
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References
AASHTO (2002) Standard specifications for highway bridges, 17th Ed., Washington, DC
Abdi MR, Sadrnejad SA, Arjomand MA (2009) Clay reinforcement using geogrid embedded in thin layers of sand. Int J Civil Eng 7(4):224–235
Abdi MR, Zandieh AR (2014) Experimental and numerical analysis of large scale pull out tests conducted on clays reinforced with geogrids encapsulated with coarse material. Geotext Geomembr 42(5):494–504
Abufarsakh MY, Coronel J, Tao M (2007) Effect of soil moisture content and dry density on cohesive soil–geosynthetic interactions using large direct shear tests. J Mater Civ Eng 19(7):540–549
Balakrishnan S, Viswanadham BVS (2019) Centrifuge model studies on the performance of soil walls reinforced with sand-cushioned geogrid layers. Geotextiles and Geomembranes
Berg R, Christopher BR, Samtani NC (2009) Design of mechanically stabilized earth walls and reinforced soil slopes. Vol. I and II. Rep. No. FHWA-NHI-10–024, National Highway Institute, Federal Highway Administration, Washington, DC
Biabani MM, Ngo NT, Indraratna B (2016) Performance evaluation of railway subballast stabilized with geocell based on pullout testing. Geotext Geomembr 44(4):579–591
Chen C, McDowell GR, Thom NH (2012) Discrete element modelling of cyclic loads of geogrid-reinforced ballast under confined and unconfined conditions. Geotext Geomembr 35(35):76–86
Elias V, Christopher BR, Berg R (2001) Mechanically stabilized earth walls and reinforced soil slopes design and construction guidelines. Rep. No. FHWA-NHI-00–043, National Highway Institute, Federal Highway Administration, Washington, DC
Gao G, Meguid MA (2018) Effect of particle shape on the response of geogrid-reinforced systems: insights from 3D discrete element analysis. Geotext Geomembr 46(6):685–698
Gu M, Han J, Zhao M (2020) Three-dimensional DEM analysis of axially loaded geogrid-encased stone column in clay bed. Int J Geomech 20(3):04019180
Lai HJ, Zheng JJ, CuiMJ ChuJ (2020) “Soil arching” for piled embankments: insights from stress redistribution behaviour of DEM modelling. Acta Geotech 15(8):2117–2136
Lai HJ, Zheng JJ, Zhang RJ, Cui MJ (2018) Classification and characteristics of soil arching structures in pile-supported embankments. Comput Geotech 98:153–171
Liu Y, Deng A, Jaksa M (2018) Three-dimensional modeling of geocell-reinforced straight and curved ballast embankments. Comput Geotech 102:53–65
Miao CX, Jia YF, Zhang J, Zhao JB (2020) DEM simulation of the pullout behavior of geogrid-stabilized ballast with the optimization of the coordination between aperture size and particle diameter. Constr Build Mater 255:119359
Miao CX, Zheng JJ, Zhang RJ, Cui L (2017) DEM modeling of pullout behavior of geogrid reinforced ballast: the effect of particle shape. Comput Geotech 81:249–261
Mirzaalimohammadi A, Ghazavi M, Roustaei M, Lajevardi SH (2019) Pullout response of strengthened geosynthetic interacting with fine sand. Geotext Geomembr 47(4):530–541
National Concrete Masonry Association (2010) Design manual for segmental retaining walls, Herndon, VA
Ouria A, Karamzadegan S, Emami S (2021) Interface properties of a cement coated geocomposite. Constr Build Mater 266:121014
Ouria A, Mahmoudi A (2018) Laboratory and numerical modeling of strip footing on geotextile-reinforced sand with cement-treated interface. Geotext Geomembr 46(1):29–39
Pan YT, Liu Y, Tyagi A, Lee FH, Li DQ (2021) Model-independent strength-reduction factor for effect of spatial variability on tunnel with improved soil surrounds. Géotechnique 71(5):406–422
Sadat Taghavi SH, Mosallanezhad M (2016) Experimental analysis of large-scale pullout tests conducted on polyester anchored geogrid reinforcement systems. Can Geotech J 54(5):621–630
Sukmak K, Sukmak P, Horpibulsuk S, Han J, Shen SL, Arulrajah A (2015) Effect of fine content on the pullout resistance mechanism of bearing reinforcement embedded in cohesive-frictional soils. Geotext Geomembr 43(2):107–117
Toufigh V, Ouria A, Desai CS, Javid N, Toufigh V, Saadatmanesh H (2016) Interface behavior between carbon-fiber polymer and sand. J Test Eval 44(1):385–390
Unnikrishnan N, Rajagopal K, Krishnaswamy NR (2002) Behavior of reinforced clay under monotonic and cyclic loading. Geotext Geomembr 20(2):117–133
Wang Z, Jacobs F, Ziegler M (2016) Experimental and DEM investigation of geogrid-soil interaction under pullout loads. Geotext Geomembr 44(3):230–246
Yang KH, Yalew WM, Nguyen M D (2015) Behavior of geotextile-reinforced clay with a coarse material sandwich technique under unconsolidated-undrained triaxial compression. Int J Geomech, 04015083
Zhang B, Shi ML, Bai SW (2006) Investigation on reinforcement-sand-clay layer system using direct-shear test. J Southeast Univ Eng Ed 22(4):544–548
Zhang R, Zheng J, Bian X (2017) Experimental investigation on effect of curing stress on the strength of cement-stabilized clay at high water content. Acta Geotech 12(4):921–936
Zhang Z, Zhang X, Qiu H, Daddow M (2016) Dynamic characteristics of track-ballast-silty clay with irregular vibration levels generated by high-speed train based on DEM. Constr Build Mater 125:564–573
Zheng JJ, Cao WZ, Zhou YJ (2017) Jiang JG (2017) Pull-out test study of interface behavior between triaxial geogrid and soil. Rock Soil Mech 38(2):317–324
Acknowledgements
This work was funded by the National Natural Science Foundation of China (NSFC) (Grant numbers 52008285, 52178341, and 51809191), the Natural Science Foundation of Guangdong Province, China (Grant number 2021A1515011682). The authors would like to acknowledge the financial supports.
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Xie, M., Zheng, J., Cao, W. et al. Mesoscopic pullout behavior of geosynthetics–sand–clay layered reinforced structures using discrete element method. Acta Geotech. 17, 2533–2552 (2022). https://doi.org/10.1007/s11440-021-01422-3
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DOI: https://doi.org/10.1007/s11440-021-01422-3