The aim of this research is to investigate numerically the behavior of strip footings resting on Sabkha soil reinforced using two methods. Firstly, using a layer of compacted sand reinforced with random distributed fibers beneath footing. Secondly, using a layer of compacted sand reinforced with geogrids.
The benefit of mentioned two methods on the improvement of strip footings bearing capacity and decreasing the settlement was investigated using a finite element computer program Plaxis 2D ver. 8.6. It was found that using two methods increases bearing capacity of strip footings significantly specially using first method (fiber reinforced sand layer). It was observed also that the settlement decreased for the same stress values.
The aim of this research is to investigate experimentally the relationship between free swell, plasticity index of expansive soil found in greater Cairo City Suburbs, Egypt with swelling pressure of mentioned soil. Predicting Swelling Pressure of any soil is a time consuming and expensive test in comparison to determining plasticity index and free swell which are simple, fast and economic tests. In present research six samples of expansive soil were collected from different locations of study area. The method uses single variable and multiple variable regression analysis using Microsoft excel software.
Existing foundation is usually subjected to additional loads from different sources like increasing floor number, additional live load and eccentric loads. A result the foundation bearing capacity failure and excessive settlement are exhibited. Consequently, the aim of this work is to predict using a finite element method software (PLAXIS 3D) the reliability of increasing the loaded strip footing bearing area method on increasing the ultimate bearing capacity of the footing and decreasing settlement. The foundation soil used was dense sand (Dr=81%). Numerical analysis are validated by comparing the numerical results with results obtained using various analytical methods by Meyerhof, Hansen and Vesic. The effect of increasing footing size on the bearing capacity factor (N) is studied. Finally, the effect of load eccentricity was studied. It was concluded that ultimate load capacity is increased by as much as 67% in case of increasing footing area by 100% (ΔB/B = 1) with significant reduction in settlement that found to be 37%. As well, it was found that the bearing capacity factor (N) is reduced when the footing size increases which agree with previous works done on this issue. It was found also, that increasing footing area decreases significantly the load eccentricity effect on bearing capacity and modifying the bearing capacity failure from general to punching shear failure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.