Concept Applied to Compression of Peat
Publication: Journal of Geotechnical Engineering
Volume 118, Issue 8
Abstract
Eight long-term multiple-stage-loading oedometer tests were performed on a fibrous peat from Middleton, Wisconsin. Both conventional-size and large specimens were treated with pore-pressure measurement. Load-increment duration and load-increment ratio were additional variables of the testing program. Time-settlement curves show that the coefficient of secondary compression () is not constant but increases in time under constant effective stress. Plots of versus compression index () indicate that, for this peat, a poor linear relationship exists between and , and this relationship worsens if tertiary compression points are included. Plots of versus void ratio show significant scatter but indicate that, in general, the ratio increases with decreasing void ratio. Load-increment ratio and sample disturbance are significant factors affecting the versus relationship. The fact that inorganic soils do not exhibit exaggerated creep effects or tertiary compression may explain, in part, the success of the concept for clays.
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References
1.
Candler, C. J., and Chartres, F. R. D. (1988). “Settlement and analysis of three trial embankments on soft peaty ground.” Proc. 2nd Baltic Conf. on Soil Mech. and Found. Engrg., International Society of Soil Mechanics and Foundation Engineering, 1, 268–272.
2.
Dhowian, A. W., and Edil, T. B. (1980). “Consolidation behavior of peats.” Geotech. Testing J., 3(3), 105–114.
3.
Edil, T. B., Fox, P. J., and Lan, L. T. (1991). “End‐of‐primary consolidation of peat.” Proc. 10th European Conf. on Soil Mech. and Found. Engrg., European Society of Soil Mechanics and Foundation Engineering, 65–68.
4.
Mesri, G. (1973). “Coefficient of secondary compression,” J. Soil Mech. and Found. Div., ASCE, 87(4), 123–137.
5.
Mesri, G., and Castro, A. (1987). “ concept and during secondary compression.” J. Geotech. Engrg., ASCE, 113(3), 230–247.
6.
Mesri, G., and Choi, Y. K. (1985). “Settlement analysis of embankments on soft clays.” J. Geotech. Engrg., ASCE, 111(4), 441–464.
7.
Mesri, G., and Godlewski, P. M. (1977). “Time‐ and stress‐compressibility interrelationship.” J. Geotech. Engrg. Div., ASCE, 103(5), 417–430.
8.
Mesri, G., Rokhsar, A., and Bohor, B. F. (1975). “Composition and compressibility of typical samples of Mexico City clay.” Geotechnique, London, England, 25(3), 527–554.
9.
Walker, L. K., and Raymond, G. P. (1968). “The prediction of consolidation rates in a cemented clay.” Can. Geotech. J., 5(4), 192–216.
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Copyright © 1992 ASCE.
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Published online: Aug 1, 1992
Published in print: Aug 1992
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