Releveling and Behavior of Strap-Retrofitted Damaged Test Foundations Exposed to Mine Subsidence
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Volume 123, Issue 9
Abstract
Test foundation walls were constructed in an area of planned subsidence. These crawl space-sized block bearing walls were located in the tension zone of a longwall panel. The test walls were 12.2 m (40 ft) long and were vertically loaded on top with soil bins to simulate the weight of a house. As the longwall proceeded past these test foundations, subsidence movements damaged the test structures. These damaged foundations were then structurally and aesthetically repaired by using a steel strap retrofit and applying a cementitious surface coating. The repaired test foundations underwent significant subsequent subsidence as an adjacent longwall was mined beneath. The response of the repaired foundation is summarized in this paper. The steel straps were also used to relevel another set of the test foundations after they were tilted and damaged by subsidence. First, the straps were applied to the block bearing walls, and then wall jacks were used to lift the upper portion of the walls to a level position. This releveling procedure is outlined with the results.
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References
1.
Bennett, R. M., Drumm, E. C., and Johnson, D. C. (1992). “Behavior of linear foundations subjected to longwall subsidence.”Proc., 3rd Workshop on Surface Subsidence Due to Underground Mining, 121–128.
2.
Marino, G. G. (1987). Residential handbook of abatement and reconstruction. Illinois Mine Subsidence Insurance Fund, Chicago, Ill.
3.
Marino, G. G. (1992). “Reinforcing block foundation walls.”Masonry Constr. Mag., 185–187.
4.
Marino, G. G., Bennett, W. R., and Gamble, W. L. (1992a). “Experimentation of advanced tilt correction methodology at West Frankfort, IL. Rep. to The Illinois Mine Subsidence Insurance Fund, 1–33.
5.
Marino, G. G., and Gamble, W. L. (1993). “A one year update of the response of the test foundations to longwall subsidence, West Frankfort, IL.”Rep. to The Illinois Mine Subsidence Insurance Fund.
6.
Marino, G. G., Hardesty, B. M., and Gamble, W. L. (1992b). “The response to longwall subsidence of cracked block test wall foundations retrofitted with steel straps, West Frankfort, IL.”Rep. to Illinois Mine Subsidence Insurance Fund.
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Published In
Journal of Geotechnical and Geoenvironmental Engineering
Volume 123 • Issue 9 • September 1997
Pages: 847 - 855
Copyright
Copyright © 1997 American Society of Civil Engineers.
History
Published online: Sep 1, 1997
Published in print: Sep 1997
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