Software for Design of Shallow Foundation using Matlab.

This paper demonstrates programmable calculations of allowable bearing capacity as per (IS: 6403-1981), settlement according to (IS 8009(part-1)-1976), design of R.C.C footing as per (IS: 456-2000) for given load, moments, soil properties using ‘MATLAB’. Firstly, the historical background is presented for the determination of allowable bearing capacity of shallow foundations. Secondly, based on a variety of case histories of site investigations, including extensive bore hole data and laboratory testing, an empirical formulation is proposed for the determination of allowable bearing capacity of shallow foundations. Various soil profiles like homogeneous, two layered and multilayer in pure cohesive, pure cohesionless and mixed c- Φ types of soil are considered in software. The software gives the optimum size of foundation with the consideration of various soil parameters for a given soil profiles. Analysis results are helpful to designers for considering allowable bearing capacity, size of footing and settlement of foundation based on IS code considerations. The soil bearing capacity is affected by many factors such as type and strength of soil, foundation width and depth, soil weight in the shear zone, surcharge, shear parameter of soil (‘c’ and’ φ’), type of loading, shape of footing and depth of influence zone below foundation. Settlement depends on soil stiffness below foundation, soil poisson’s ratio, depth of incompressible layer and foundation width. Variation in these parameters makes calculations complex. By using software these complex calculations can be optimized with consideration of economical aspects, safety and IS code. The results obtained in this work are compared with renowned books of the field and are found satisfactory.