Evaluation of In‐Place Wetting Using Soil Suction Measurements
Publication: Journal of Geotechnical Engineering
Volume 119, Issue 5
Abstract
An evaluation of water sources and extent of wetting at a collapsible soil site is presented. The field and laboratory data were collected after distress of an existing structure was observed. The underlying soils at the site were highly variable in fines content, density, and degree of saturation. Because of the high variability of soil properties, suction contours were developed for the site to evaluate the extent of soil wetting. A relationship between soil suction and basic soil parameters was developed for use in constructing these contours. The depth of wetting obtained using the suction contours was consistent with other data at the site, including quantity of water introduced and standard penetration test results. Laboratory collapse curves were used to estimate the settlement at the site for the depth of wetting inferred from the suction contours. The computed settlements, taking into consideration partial wetting effect, were consistent with observed settlements of the structure.
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References
1.
El‐Ehwany, M., and Houston, S. (1990). “Settlement and moisture movement in collapsible soils.” J. Geotech. Engrg., ASCE, 116(10), 1521–1535.
2.
Houston, S., and El‐Ehwany, M. (1991). “Sample disturbance of cemented collapsible soils.” J. Geotech. Engrg., ASCE, 117(5), 731–752.
3.
Houston, S., Houston, W., and Spadola, D. (1988). “Prediction of field collapse of soils due to wetting.” ASCE, 114(1), 40–58.
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Mahmond, H. (1991). “The development of an in‐situ collapse testing system for collapsible soils.” PhD dissertation, Arizona State Univ., Tempe, Ariz.
5.
McKeen, R. (1988). “Soil characterization using suction measurements.” Proc., 25th Paving and Transp. Conf., Univ. of New Mexico, Albuquerque, N.M.
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Copyright © 1993 American Society of Civil Engineers.
History
Received: Feb 12, 1992
Published online: May 1, 1993
Published in print: May 1993
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