Evaluation of the Effects of Reinforced or Stabilized Coarse Surface Layer on Bearing Capacity of Soft Clays

Authors

Faculty of Civil Engineering, K.N. Toosi University of Technology

Abstract

Natural soft clay soils due to the lack of sufficient bearing capacity and the high deformation potential require to be improved using either chemical stabilization methods or physical methods such as soil reinforcement or pre- compression. The method used is greatly influenced by technical and the economic considerations as well as the physical characteristics required (Abdi and Zandieh, 2014). Chemical stabilization generally results in increasing the strength and the bearing capacity and reduces the swelling- shrinkage potential of the clayey soil. On the other hand from ancient times humans have used natural fibers to alleviate the weakness of soil in resisting tensile stresses (Abu-Farsakh et al., 2008). Now-a-days due to the technical progress made synthetic materials such as geo-synthetics are used for soil improvement. Use of geo-synthetics such as geogrids and geotextiles have grown rapidly in the construction of soil structures such as embankment dams for reducing the volume of materials needed as well as drainage purposes, increasing bearing capacity in foundation engineering, etc (Alawaji, 2001). These materials are easy to use and environmentally friendly. Coarse grained materials are also employed in construction of reinforced soil structures due to high drainage and shear strength characteristics as well as volume stability due to moisture variations and time (Alawaji, 2001).

Keywords

References

Abdi MR, Zandieh R, “Experimental and numerical analysis of large scale pull out tests conducted on clays reinforced with geogrids encapsulated with coarse material”, Geotextiles and Geomembranes, 2014, 42, 494-504.
Abu-Farsakh M, Chen Q, Sharma R, Zhang X, “Large scale model footing tests on geogrid-reinforced foundations and marginal embankment soils”, Geotechnical Testing Journal, ASTM, 2008, 31 (5), 413-423.
Patra CR, Das BM, Shin EC, “Eccentrically loaded strip foundation on geogrid-reinforced sand”, Geotextiles and Geomembranes, 2006, 24, 254-259.
Alawaji HA, “Settlement and bearing capacity of geogrid-reinforced sand over collapsible soil”, Geotextiles and Geomembranes, 2001, 19, 75-88.
Basudhar PK, Santanu S, Kousik D, “Circular footings resting on geotextile-reinforced sand bed”, Geotextiles and Geomembranes, 2007, 25, 377-384.
Radhey S, Qiming C, Murad AF, Sungmin Y, “Analytical Modeling of Geogrid Reinforced Soil Foundation”, Geotextiles and Geomembranes, 2009, 27, 63-72.
Sawwaf ME, Nazir AK, “Behavior of repeatedly loaded rectangular footings resting on reinforced sand”, Alexandria Engineering Journal, 2010, 49, 349-356.
Singh P, Gill K, “CBR Improvement of Clayey Soil with Geogrid Reinforcement”, International Journal of Emerging Technology and Advanced Engineering, 2012, 2 (6), 315-318.
Chakravarti VK, Jyotshna B, “Efficacy of Overlying Coarse Aggregate and Geosynthetic Seperation on CBR Value for Soft Subgrade of Varying Plasticity- A Laboratory Study”, International Journal of Research in Engineering and Technology, 2013, 2, 749-755.
Kazi M, Shukla SK, Habibi D, “An Improved Method to Increase the Load-Bearing Capacity of Strip Footing Resting on Geotextile-Reinforced Sand Bed”, Indian Geotechnical Journal, 2014, 45, 98-109.
Kazi M, Shukla SK, Habibi D, “Effect of Submergence on Settlement and Bearing Capacity of Surface Strip Footing on Geotextile-Reinforced Sand Bed”, International Journal of Geosynthetic and Ground Engineering, 2015, 1, 20.
Biswas A, Ansari A, Dash SK, Krishna AM, “Behavior of Geogrid Reinforced Foundation Systems Supported on Clay Subgrades of Different Strengths”, International Journal of Geosynthetic and Ground Engineering, 2015, 1, 4.
Adam CA, Apraku E, Opoku-Boahen R, “Effect of Triaxial geogrid Reinforcement on CBR strength of natural gravel soil for road pavements”, Journal of Civil Engineering Research, 2015, 5 (2), 45-51.
Fang HY, Daniels JL, “Introductory geotechnical engineering- an environmental perspective”, Taylor and Francis, London, 2006.
Das BM, “Principles of foundation engineering”, Cengage Learning, 2011.
Das BM, Yen SC, Dass RN, “Brazilian Tensile Strength Test of Lightly Cemented Sand”, Can. Geotech, 1995, Journal 32, 166-171.
Al-Aghbari, MY, Mohamedzein YEA, Taha R, “Stabilization of Desert Sand Using Cement and Cement Dust”, Proceeding of the Institution of Civil Engineers, Ground Improvement, 2009, (162), 145-151.
Park SS, “Unconfined Compressive Strength and Ductility of Fiber- Reinforced Cemented Sand”, Construction and Building Materials (25), 2011, 1134-1138.
Porbaha A, Shibuya S, Kishida T, “State- of- the- Art in Deep Mixing Technology”, Geomaterial Characterization, Ground Improvement, 2000, 4 (3), 91-110.
Guido VA, Biesiadecki GL, Sullivan, MJ, “Bearing Capacity of a Goetextile Reinforced Foundation”, Proceedings, Eleventh International Conference on Soil Mechanics and Foundation Engineering, San Ferancisco, 1985, 3, 1777-1780.
Kumar P, Rajkumar R, “Effect of Geotextile on CBR Strength Of unpaved Road with Soft Subgrade”, Electronic Journal of Geotechnical Engineering, 2012, 17, 1355-1363.
www.meshiran.com
www.ngp-co.com
www.mazandarancement.com
Journal of Civil and Environmental Engineering
Volume 49.3, Issue 96 - Serial Number 96
Autumn, 2019
December 2019
Pages 97-106

Files

Share

How to cite

Statistics