THE BEARING CAPACITY OF A CIRCULAR FOOTING ON GYPSEOUS SOIL BEFORE AND AFTER IMPROVEMENT

Bearing capacity of soil is an important factor in designing circular footing. It directly related to foundation dimensions and consequently its performance. The calculations for obtaining the bearing a needs many varying parameters, example type, depth foundation, unit weight soil, etc. In this work, comparison between values footing on gypseous before after improvement determined by two different methods, first method using compacted cement dust (Case1). were performed making trench under filled with (at optimum moisture content) at three depths [(Depth trench, D =Width B =2 * radius R); (D=2B=4R) ; (D=3B=6R)], had same Dimensions, second reinforcing biaxial geogrids (Case2) have been shown be effective improving ultimate granular soils.