ABSTRACT
Realisation of structures always makes use of the soil on which, in which, or with which they are built. Whenever engineers find that the natural conditions of the soil are inadequate for the envisaged work they are faced with the following well-known alternatives of:
1 bypassing the unsuitable soil in choosing a deep foundation; 2 removing the bad soil and replacing it with appropriate soil; 3 redesigning the structure for these conditions; 4 improving these conditions to the necessary extent.
