Large model footing load test on reinforced coal ash slope
Faculty of Health, Engineering and Science
School of Engineering
The use of coal ash in structural fills to support footings and pavements in low lying areas can be one of the cost effective and environmentally friendly solutions to disposal problems related to coal ash, because wastes can be consumed in large quantities in such applications. The difficulty with this ash disposal solution is that the structural fills may not meet the foundation requirements for bearing capacity and settlement, especially when footings and pavements are constructed near the crest of the ash fill slope. Inclusion of geosynthetic reinforcements as horizontal sheets within the fill may be one of the most viable techniques for improving the load bearing capacity of the coal ash slope. Most technical information available in the literature on the load bearing capacity of footings resting on the slopes is based on small scale laboratory model tests; hence practicing engineers cannot generally adopt the information realistically. Therefore, in the present study as described in this paper, large scale model footing tests were conducted in the laboratory to find out the effectiveness of use of single and multilayer geosynthetic reinforcements in improving the load bearing capacity of coal ash slope. The results were found to be encouraging and they may have practical applications.