Abstract
Plate load tests were conducted on unreinforced expansive clay beds and clay beds reinforced with Granular Pile Anchor (GPA) and geogrid-encased GPA to compare their compressive load response. It was found from the tests that the expansive clay beds reinforced with geogrid-encased GPA showed higher load-carrying capacity and improved compressive load response compared with GPA and unreinforced beds. The applied pressure to cause a settlement of 25 mm in the unreinforced clay bed and clay bed reinforced with GPA of length 97 mm and diameter 30 mm (\( \frac{{l_{gp} }}{{d_{gp} }} = 3.23 \)) was respectively 152.78 kPa and 789.4 kPa, showing an improvement of 416.7%. However, the clay bed reinforced with geogrid-encased GPA required a pressure of 858.16 kPa for the same amount of settlement. This shows an improvement of 461.7% with respect to the unreinforced clay bed. Among three types of anchors used in this study, the one with a length of 97 mm and a diameter of 30 mm showed the best load response when tested without geogrid, resulting in an improvement of 659.3% whereas, the same GPA showed a better improvement of 955.57% when encased with geogrid.
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Abbreviations
- GPA:
-
Granular Pile Anchor
- \( l_{gp} \) :
-
Length of GPA
- \( d_{gp} \) :
-
Diameter of GPA
- PVC:
-
Poly vinyl chloride
- G:
-
Specific gravity
- \( D_{r} \) :
-
Relative density
- \( \gamma_{d} \) :
-
Maximum dry density
- OMC:
-
Optimum moisture content
- \( c^{\prime} \) :
-
Cohesion
- \( \phi^{\prime} \) :
-
Internal angular friction
- \( \delta \) :
-
Interface friction angle
- \( e_{o} \) :
-
Natural void ratio
References
Ismail, M.A., Shahin, M.A.: Finite element analyses of granular pile anchors as a foundation option for reactive soils. In: Proceedings of International Conference on Advances in Geotechnical Engineering, Perth, Australia, 7–9 November 2011 (2011). ISBN: 978-0-646-55142-5
Ismail, M.A., Shahin, M.A.: Numerical modeling of granular pile-anchor foundations (GPAF) in reactive soils. Int. J. Geotech. Eng. 6, 149–156 (2012). https://doi.org/10.3328/ijge.2012.06.02.149-156
Johnson, N., Sandeep, M.N.: Ground improvement using granular pile anchor foundation. Procedia Technol. (2016). https://doi.org/10.1016/j.protcy.2016.05.035
Katti, R.K., Katti, D.R., Katti, A.R.: Behaviour of Saturated Expansive Soil and Control Methods. Balkema Publishers, Amsterdam (2002)
Muthukumar, M., Shukla, S.K.: Swelling behaviour of expansive clay beds reinforced with encased granular pile anchors. Int. J. Geotech. Eng. (2016). https://doi.org/10.1080/19386362.2016.1254991
Phanikumar, B.R., Sharma, R.S., Rao, A.S., Madhav, M.R.: Granular pile-anchor foundation system for improving the engineering behaviour of expansive clay beds. Geotech. Test. J. ASTM (2004). https://doi.org/10.1520/GTJ11387
Phanikumar, B.R., Rao, A.S., Suresh, K.: Field behaviour of granular pile-anchors in expansive clays. Ground Improvement J. (2008). https://doi.org/10.1680/grim.2008.161.4.199
Phanikumar, B.R.: A study of swelling characteristics of expansive soils and granular pile-anchor foundation system in expansive soils. Doctoral Thesis, JNTU Hyderabad, India (1997)
Phanikumar, B.R., Ramachandra, Rao N.: Increasing pullout capacity of granular pile anchors in expansive soils using base geosynthetics. Can. Geotech. J. (2000). https://doi.org/10.1139/t00-012
Phanikumar, B.R.: Influence of geogrid reinforcement on pullout response of granular pile-anchors (GPAs) in expansive soils. Indian Geotech. J. (2016). https://doi.org/10.1007/s40098-016-0180-z
Raghuram, A.S.S., Rao, A.S.: Pullout behavior of geogrid-encased granular pile-anchor embedded in expansive clays. In: Proceedings of the 19th International Conference on Soil Mechanics and Geotechnical Engineering, Seoul (2017)
Raghuram, A.S.S., Rao, A.S., Purnanandam, K.: Pullout behaviour of geogrid encased granular pile anchor embedded in expansive clays. In: Proceedings of Indian Geotechnical Conference, Chennai (2016)
Rao, A.S., Phanikumar, B.R., Babu, R.D., Suresh, K.: Pullout behaviour of granular pile-anchors in expansive clay beds in situ. J. Geotech. Geoenviron. Eng. (2007). https://doi.org/10.1061/(ASCE)1090-0241(2007)133:5(531)
Rao, A.S., Phanikumar, B.R., Suresh, K.: Response of granular pile anchors under compression. Ground Improv. J. (2008). https://doi.org/10.1680/grim.2008.161.3.121
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Raghuram, A.S.S., Phanikumar, B.R., Rao, A.S. (2019). Load Carrying Capacity of Expansive Clay Beds Reinforced with Geogrid-Encased Granular Pile-Anchors. In: Meguid, M., Guler, E., Giroud, J. (eds) Advances in Geosynthetics Engineering. GeoMEast 2018. Sustainable Civil Infrastructures. Springer, Cham. https://doi.org/10.1007/978-3-030-01944-0_4
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