Analysis and settlement evaluation of an end-bearing granular pile with non-linear deformation modulus

• Autorzy: Sharma J. K. , Gupta P.

Identyfikatory

DOI

10.2478/sgem-2018-0022

• Języki publikacji: EN

Abstrakty

EN

Ground improvement with granular piles increases the load-carrying capacity, reduces the settlement of foundations built on the reinforced ground and is also a good alternative to concrete pile. Granular piles or stone columns are composed of granular material, such as crushed stone or coarse dense sand. An analytical approach based on the continuum approach is presented for the non-linear behaviour of the granular pile. The formulation for pile element displacement is done considering the non-homogeneity of the granular pile as it reflects the true behaviour and also accounts for the changes in the state of the granular pile due to installation, stiffening and improvement effects. The present study shows that the settlement influence factor for an endbearing granular pile decreases with increase in the relative stiffness of the bearing stratum. The settlement influence factor decreases with increase in linear and non-linear non-homogeneity parameters for all values of relative length. For a shorter pile, the rate of decrease of the settlement influence factor is greater in comparison to that for a longer pile. Shear stress at the soil-granular pile interface reduces in the upper compressible portion of the granular pile and increases in the lower stiffer portion of the granular pile due to the non-homogeneity of an endbearing granular pile.

Słowa kluczowe

EN

end-bearing granular pile; relative stiffness; bearing stratum; granular pile; deformation modulus; settlement influence factor

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2018
• Tom: Vol. 40, nr 3
• Strony: 188--201
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Sharma J. K.

• Rajasthan Technical University , Kota, Rajasthan

autor

Gupta P.

• Maharishi Arvind International Institute of Technology, Kota, Rajasthan

Bibliografia

• [1] Mattes, N.S., Poulos, H.G. (1969). Settlement of single compressible pile. Journal of the Soil Mechanics and Foundations Division, ASCE, 95(SM1), 189-207.
• [2] Poulos, H.G., Mattes, N.S. (1969). The behavior of axiallyloaded end-bearing piles. Geotechnique, 19, 285-300.
• [3] Butterfield, R., Banerjee, P.K. (1971). The elastic analysis of compressible piles and pile groups. Geotechnique, 21(1), 43-60.
• [4] Madhav, M.R., Sharma, J.K., Chandra, S. (2006). Analysis and settlement of a non-homogeneous granular pile. Indian Geotechnical Journal, 36(3), 249-271.
• [5] Gupta, P., Sharma, J.K. (2018). Settlement analysis of nonhomogeneous single granular pile. Indian Geotechnical Journal, 48(1), 92-101. doi: 10.1007/s40098-017-0240-z.
• [6] Alamgir, M., Miura, N., Poorooshasb, H.B., Madhav, M.R. 1996. Deformation analysis of soft ground reinforced by columnar inclusions. Computers and Geotechnics, 18(4), 267-299.
• [7] Madhav, M.R., Sharma, J.K., Sivakumar, V. (2009). Settlement and load distribution in a granular piled raft. Geomechanics and Engineering, 1(1), 97-112.
• [8] Zhang, L., Zhao, M., Shi, C., Zhao, H. (2013). Settlement calculation of composite foundation reinforced with stone columns. International Journal of Geo-mechanics, ASCE, 13(3), 248-256.
• [9] Indraratna, B., Basack, S., Rujikiatkamjorn, C. (2013). Numerical solution of stone column improved soft soil considering arching, clogging and smear effects. Journal of Geotechnical and Geoenvironmental Engineering, 139(3), 377-394.
• [10] Randolph, M.F., Wroth, C.P. (1978). Analysis of deformation of vertically loaded piles. Journal of the Geotechnical Engineering Division, ASCE 104(GT2), 1465-1488.
• [11] Eldho, C.A., Jose, A., Balamurugan, V., Parackal, P.J., Priya, K.L. (2010). Ground improvement using stone columns and PVD. In: Indian Geotechnical Conference, December 16-18, 2010 GEOtrendz, IGS Mumbai Chapter & IIT Bombay,Mumbai(India).
• [12] Hayashi, H., Nishimoto, S., Takahashi, M. (2011). Field performance of PVD combined with reinforced embankment on peaty ground. Journal of Soils and Foundations, 51(1), 191-201.
• [13] Cecilia, B., Serge, L. (2013). Case studies of stone columns improvement in seismic areas. In: 3ème CMIG’ Alger, 18 et 19, Algeria.
• [14] Andreou, P., Papadopoulos, V. (2014). Factors affecting the settlement estimation of stone column reinforced soils. Geotechnical and Geological Engineering, 32(5), 1175-1185.
• [15] Etezad, M., Hanna, A.M., Ayadat, T. (2014). Bearing capacity of a group of stone columns in soft soil. International Journal of Geomechanics, 15(2), 04014043.
• [16] Scott, R.F. (1981). Foundation Analysis. Prentice-Hall Inc., Englewood Cliffs, NJ, p. 545.