Experimental study of geotechnical behaviour of different shell foundations on unreinforced and reinforced sandy soil
Article Sidebar
Main Article Content
Abstract
This paper presents the performance of three types of small-scale shell foundations (pyramidal frustum, semi-cylindrical and prismatic shell) of the same plan area on different states of sand provided with or without reinforcement. To understand the effect of reinforcement and its dependency on the vertical embedment depth, two cases were considered, i.e. reinforcement at a depth equal to 0.5 B (B=width of foundation) and another case at a depth equal to B. Bearing capacity for different shell foundations models and settlement behaviour were studied based on the load settlement curves and compared with that of conventional flat foundation model. The experimental results show that shell models perform better than the flat foundation model in terms of bearing capacity and settlement resistance on the different states of sand with or without reinforcement. The relationship of ultimate load with the angle of internal friction was found. Reinforcement embedded at 0.5B depth was found to be better than provided at B depth in all the states of sand. It is also noticed that the bearing capacity ratio is lower for the sand reinforced at a depth of B than that of 0.5B, showing the dependency on reinforcement embedment depth.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
References
Hanna A, Abdel-Rahman M. Experimental investigation of shell foundations on dry sand. Can Geotech J. 1998;35:847-57.
Yamamoto K, Lyamin AV, Abbo AJ, Sloan SW, Hira M. Bearing capacity and failure mechanism of different types of foundations on sand. Soils and Foundations 2009;49(2):305-14.
Colmenares JE, Kang SR, Shin YJ, Shin JH. Ultimate bearing capacity of conical shell foundation. Struct Eng Mech. 2014;52(3):507-23.
Fernando N, Sendanayake E, Sendanayake D, De Silva N. The experimental investigation of failure mechanism and bearing capacity of different shallow foundations. In: Ratnayake N, editor. Proceedings of the Civil Engineering Research for Industry Symposium 2011; 2011 Dec 20; University of Moratuwa, Sri Lanka. p. 67-72.
Huat BBK, Mohammed TA, Abang Ali AAA, Abdullah AA. Numerical and field study on triangular shell footing for low rise building. Int J Eng Technol. 2007;4(2):194-204.
Rinaldi R, Abdel-Rahman M, Hanna A. Experimental investigation on shell footing models employing high-performance concrete. In: Rodrigues H, Elnashai A, Calvi G, editors. Facing the Challenges in Structural Engineering (GeoMEast 2017). Sustainable Civil Infrastructures. Cham: Springer; 2018. p. 373-90.
Fattah MY, Waryosh WA, Al-Hamdani MAE. Investigation on the behaviour of conical shell foundations composed of reactive powder concrete embedded on sandy soil. Adv Struct Eng. 2015;18(11):1859-73.
Alaa Y. Mahmood and Amina A. Khalil. Experimental study for load-settlement behavior of flat and shell footings on sandy silt soil. E3S Web Conf. 2023;427:1-8.
Idris Y, Dewi R, Sutejo Y, Al Munawar SA. Bearing capacity of folded plate foundations in clay soil. J Appl Eng Sci. 2021;19(3):681-7.
Abu-Farsakh M, Chen Q, Sharma R. An experimental evaluation of the behavior of footings on geosynthetic-reinforced sand. Soils Found. 2013;53(2):335-48.
Omar MT, Das BM, Puri VK, Yen SC. Ultimate bearing capacity of shallow foundations on sand with geogrid reinforcement. Can Geotech J.1993;30(3):545-9.
Kolay PK, Kumar S, Tiwari D. Improvement of bearing capacity of shallow foundation on geogrid reinforced silty clay and sand. J Constr Eng. 2013;2013:1-10.
Esmaili D, Hataf N. Experimental and numerical investigation of ultimate load capacity of shell foundations on reinforced and unreinforced sand. Iran J Sci Technol Trans B Eng. 2008;32(B5):491-500.
Azzam WR, Nasr AM. Bearing capacity of shell strip footing on reinforced sand. J Adv Res. 2015;6(5):727-37.
Hassan SA, Al-Soud MS, Mohammed SA. Behaviour of pyramidal shell foundation on reinforced sandy soil. Geotech Geol Eng. 2019;37:2437-52.
Shaligram PS. Behaviour of triangular shell footing on geo-reinforced layered sand. Int J Adv Eng Technol.2011;2(2):192-6.
Hassan SA, Al-Soud MS, Mohammed SA. Behavior of shell foundations on sandy soil reinforced with a circular geogrid. J Eng Sustain Dev. 2018;22(5):147-58.
Indian Standard. IS: 2720 (Part 4)-1985. Methods of test for soils. Part 4 Grain size analysis (Second Revision). New Delhi: Bureau of Indian Standards; 1986.
Indian Standard. IS: 2720 (Part III/Sec1)-1980. Methods of test for soils. Part III Determination of specific gravity. Section 1 Fine grained soils (First revision). New Delhi: Bureau of Indian Standards; 1989.
Indian Standard. IS: 516-1959. Methods of tests for strength of concrete. New Delhi: Bureau of Indian Standards; 1959.
Madhavi Latha G, Somwanshi A. Bearing capacity of square footings on geosynthetic reinforced sand. Geotext. Geomembr. 2009;27(4):281-94.
ASTM. ASTM D1194: Standard test method for bearing capacity of soil for static load and spread footings. West Conshohocken ASTM International; 1994.
Vaid YP, Negussey D. Relative density of pluviated sand samples. Soils Found. 1984;24(2):101-5.
Indian Standard. IS: 2720 (Part13)-1986. Methods of test for soils. Part 13 Direct shear test (Second Revision). New Delhi: Bureau of Indian Standards; 1986.
Indian Standard. IS: 2720 (Part 14)-1983. Methods of test for soils. Part 14 Determination of density index (relative density) of cohesionless soils (First Revision). New Delhi: Bureau of Indian Standards; 1983.
Andrawes KZ, McGown A, Al-Hasani MM. Alteration of soil behaviour by the inclusion of materials with different properties. Ground Eng. 1978;11(6):35-42.
Chakraborty D, Kumar J. Bearing capacity of circular footings on reinforced soils. Int J Geomech. 2013;15(1):04014034.
Chakraborty D, KumarJ. Bearing capacity of strip foundations in reinforced soils. Int J Geomech. 2012;14(1):45-58.
Moghaddas Tafreshi SN, Dawson AR. Comparison of bearing capacity of a strip footing on sand with geocell and with planar forms of geotextile reinforcement. Geotext. Geomembr. 2010;28(1):72-84.
Lal D, Sankar N, Chandrakaran S. Effect of reinforcement form on the behaviour of coir geotextile reinforced sand beds. Soils Found. 2017;57(2):227-36.
Cerato AB, Lutenegger AJ. Scale effects of shallow foundation bearing capacity of granular material. J Geotech Geoenviron Eng. 2007;133(10):1192-202.
Jafarian Y, Haddad A, Mehrzad B. Load-settlement mechanism of shallow foundations rested on saturated sand with upward seepage. Int J Geomech. 2017;17(3):04016076.
Kusakabe O. Chapter 6 Foundations. Geotechnical centrifuge technology. In: Taylor RN, editor. London: Blackie Academic and Professional; 1995. p. 118-67.