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Bearing Capacity Improvement of Sand Bed Reinforced with 3D Geogrids of Rectangular Pattern

  • Femy M. MakkarEmail author
  • S. Chandrakaran
  • N. Sankar
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 30)

Abstract

In this paper, the effect of three-dimensional geogrid as a reinforcing material in enhancing the bearing capacity and settlement behaviour of reinforced soil is investigated. Laboratory-scaled plate load tests have been conducted to study the performance of square footing resting on the sand bed reinforced with 3D geogrids of rectangular pattern. The results show that a single layer of 3D geogrid placed at a depth of 0.25B from the bottom of footing provides a threefold increase in bearing capacity compared to unreinforced soil. The optimum spacing between two consecutive layers of 3D geogrids was obtained as 0.75B. Soil reinforced with two layers of 3D geogrid gives higher bearing capacity improvement (6 times) and a further increase in the number of layers does not show any significant improvement in bearing capacity. The results obtained from this study shows that 3D geogrids can be used as an effective reinforcing material in improving the mechanical properties of reinforced soil structures such as embankments, retaining walls, shallow foundations, stabilization of steep slopes, etc.

Keywords

3D geogrids Bearing capacity Footing settlement Plate load test Shallow foundation 

References

  1. Abu-Farsakh M, Chen Q, Sharma R (2013) An experimental evaluation of the behavior of footings on geosynthetic reinforced sand. Soils Found 53(2):335–348Google Scholar
  2. Ghosh A, Bera AK (2005) Bearing capacity of square footing on pond ash reinforced with jute-geotextile. Geotext Geomembr 23(2):144–173CrossRefGoogle Scholar
  3. Harikumar M, Sankar N, Chandrakaran S (2016) Behaviour of model footing resting on sand bed reinforced with multi-directional reinforcing elements. Geotext Geomembr 44:568–578CrossRefGoogle Scholar
  4. Khedkar MS, Mandal JN (2009) Pullout behavior of cellular reinforcements. Geotext Geomembr 27:262–271CrossRefGoogle Scholar
  5. Latha GM, Somwanshi A (2009a) Bearing capacity of square footings on geosynthetic reinforced sand. Geotext Geomembr 27(4):281–294CrossRefGoogle Scholar
  6. Latha GM, Somwanshi A (2009b) Effect of reinforcement form on the bearing capacity of square footings on sand. Geotext Geomembr 27:409–422CrossRefGoogle Scholar
  7. Mosallanezhad M, Alfaro MC, Hataf N, Sadat Taghavi SH (2016) Experimental and numerical studies of the performance of the new reinforcing system under pullout conditions. Geotext Geomembr 44:70–80CrossRefGoogle Scholar
  8. Sireesh S, Seetharam TG, Dash SK (2009) Bearing capacity of circular footing on geocell-sand mattress overlying clay bed with void. Geotext Geomembr 27:89–98CrossRefGoogle Scholar
  9. Vinod P, Ajitha BB, Sreehari S (2009) Behavior of a model square footing on loose sand reinforced with braided coir rope. Geotext Geomembr 27:464–474CrossRefGoogle Scholar
  10. Zhang MX, Javadi AA, Min X (2006) Triaxial test of sand reinforced with 3D inclusions. Geotext Geomembr 24:201–209CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringNIT CalicutCalicutIndia

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