Numerical Assessment of Isolated Footing Capacity due to its Size and the Impact of Neighboring Foundation

Document Type : Research Note


1 Department of Civil Engineering, Ahsanullah University of science and Technology, Dhaka, Bangladesh

2 Assistant Professor, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka, Bangladesh

3 Lecturer, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka, Bangladesh


Shallow foundations are uses for safe transmission of structural load to the ground considering soil bearing capacity and allowable settlement. In this research, an empirical analysis is present by using Terzaghi and Meyerhof model. Which is compared with numerical analysis using PLAXIS 3D Foundation. Bearing capacity determined by both cases matched well. The purpose of the study is to predict the maximum allowable stress capacity of shallow foundation in different conditions and establish relationships between stress and settlements for different footing dimensions under various circumstances, as well as the impact of pressure bulb overlapping of two adjacent footing. There are some notable findings are found in this study such as Ultimate stress bearing capacity of soil under allowable settlement varies if two adjacent footings are placed 1.5 m apart. Similar results have been found by varying spacing 2 m & 2.5 m. Sizes of footing may have insignificant effect on spacing between two adjacent footings. And footing may act as an isolated footing in 3 m away from another footing on sandy soil and 2 m away from another footing on clayey soil.


Main Subjects

[1]     Banik S. Determination of bearing capacity of shallow foundation on Dhaka sub-soil using subloading tij model 2014.
[2]     S. A. Settlement of Strip footing on Sand Mat Placed over Thick Soft Clay Deposit. Bangladesh University Of Engineering And Technology, Master Thesis. 2016.
[3]     Nakai T, Shahin HM, Zhang F, Hinokio M, Kikumoto M, Yonaha S, et al. Bearing capacity of reinforced foundation subjected to pull-out loading in 2D and 3D conditions. Geotext Geomembranes 2010;28:268–80.
[4]     Bunyamin S, Aghayan S. Settlement Modelling of Raft Footing Founded on Oferekpe/Abakaliki Shale in South East Region of Nigeria. Comput Eng Phys Model 2018;1:68–82.
[5]     Sadeeq J, Salahudeen A. Strength characterization of foundation soils at federal university lokoja based on standard penetration tests data. Niger J Technol 2017;36:671–6.
[6]     Salahudeen AB, Eberemu AO, Ijimdiya TS, Osinubi KJ. Empirical and numerical prediction of settlement and bearing capacity of foundations from SPT data in North-West region of Nigeria. Niger J Eng 2017;23:31–41.
[7]     Amorin MEC, Ventura GP. Bearing capacity and settlement analysis of closely spaced shallo w foundations with various footing geometry on multi-layered soils. Evol Geotech 2022:339.
[8]     Zheng G, Zhao J, Zhou H. Ultimate bearing capacity of two interfering strip footings on sand overlying clay. Acta Geotech 2021;16:2301–11.
[9]     Anaswara S, Shivashankar R. Study of Tilt on Adjacent Strip Footings, 2021, p. 517–25.
[10]   Smith IM, Griffiths DV, Margetts L. Programming the finite element method. John Wiley & Sons; 1982.
[11]   Koiter WT. General theorems for elastic plastic solids. Prog Solid Mech 1960:167–221.
[12]   Van Langen H, Vermeer PA. Automatic step size correction for non-associated plasticity problems. Int J Numer Methods Eng 1990;29:579–98.
[13]   Asif TH, Islam S, Basak A, Shahriar F, Rahman SMS. Application of Numerical Method in Assessing the Variations in Pile Group Efficiency under Different Circumstances. Comput Eng Phys Model 2022;5:50–68.
[14]   Button SJ. The bearing capacity of footing on a two-layer cohesive subsoil. Proc 3^< Rd> ICSMFE, 1953 1953;1:332–5.
[15]   Brown JD, Meyerhof GG. Experimental study of bearing capacity in layered clays. Soil Mech Fdn Eng Conf Proc/Mexico/, 1969.
[16]   A A, NK A, A. D. An Overview of Bearing Capacitay od Shallow Foundation. Compliance Eng 2020;11:393.
[17]   Meyerhof GG. Ultimate Bearing Capacity of Footings on Sand Layer Overlying Clay. Can Geotech J 1974;11:223–9.
[18]   Georgiadis M, Michalopoulos AP. Bearing Capacity of Gravity Bases on Layered Soil. J Geotech Eng 1985;111:712–29.
[19]   Sanjeev K V, Pradeep KJ, Rakesh K. Prediction of bearing capacity of granular layered soil by plate load test. Int J Adv Eng Res Stud E-ISSN2249–8974 2013.
[20]   Marto A, Oghabi M, Eisazadeh A. The effect of geogrid reinforcement on bearing capacity properties of soil under static load. Univ Teknol Johor Bahru 2013.
[21]   Meyerhof G.G. Foundation engineering handbook, 1956
[22]   “USACE”. Settlement Analysis, 1990.
[23]   Lindeburg. Civil Engineering Reference Manual, 2001, 8th Edition.
[24]   Table from das, 1994. [18 October 2019].
[25]   Bowles JE. Foundation analysis and design. 1996.
[26]   Salahudeen AB, Sadeeq JA. Investigation of shallow foundation soil bearing capacity and settlement characteristics of Minna City Centre development site using Plaxis 2D software and empirical formulations. Niger J Technol 2017;36:663–70.
[27]   Meyerhof GG, Hanna AM. Ultimate bearing capacity of foundations on layered soils under inclined load. Can Geotech J 1978;15:565–72.
[28]   Vinod P. Analyses Of Two-Layer Soil Systems Beneath Rigid Footings 2013.
[29]   Burd HJ, Frydman S. Bearing capacity of plane-strain footings on layered soils. Can Geotech J 1997;34:241–53.
[30]   Imam Al Kudrot EE. Evaluation of soil characteristics for determination of bearing capacity of shallow foundation based on CPT 2015.
[31] _(engineering) ,17 August 2020 n.d.
[32]   Das BM, Sivakugan N. Principles of foundation engineering. Cengage learning; 2018.
[33] n.d.
[34]   Brinkgreve RBJ. Tutorial Manual PLAXIS 3D Foundation. Delft Univ Technol Plaxis Bv Netherl 2013;665.