Stress-temperature effects on peat compression

James L. Hanson, Tuncer B. Edil, Patrick J. Fox

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Laboratory and field tests have shown that accelerated compression of peat soils occurs in response to moderate heating and an effective overconsolidation is produced on subsequent cooling. This phenomenon has been termed thermal precompression. In this study, long-term laboratory and field tests were conducted to investigate secondary compression behavior of peat as a function of stress and temperature. Step-stress and step-temperature compression tests were conducted on two peat soils. Dramatic effects were observed upon heating and cooling. A field test site in Middleton, Wisconsin, USA was constructed to test the thermal precompression concept for in situ peats. The site contained two instrumented embankments. The soils under one test embankment were left at ambient temperature conditions. The soils beneath the second embankment were heated for a one-year period using a circulating hot water system. An increase in temperature up to 20°C over ambient conditions was achieved at depths extending to 5 m. Secondary compression rates for the heated embankment were up to 4 times greater than the corresponding rates for the unheated embankment. After the soils under the second embankment cooled for one year, a second lift of soil was applied to both embankments and subsequent settlement was monitored over a ten-year period. The relationship of rate of void ratio change during secondary compression as a result of temperature and stress changes is described. This is provided as a function of void ratio for the peat soils using laboratory tests and for in situ compression using the field test site data.

Original languageEnglish (US)
Title of host publicationProceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112
Pages331-345
Number of pages15
DOIs
StatePublished - Dec 1 2000
EventUnited Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112 - Noordwijkerhout, Netherlands
Duration: May 28 2000Jun 2 2000

Publication series

NameProceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112
Volume301

Other

OtherUnited Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112
CountryNetherlands
CityNoordwijkerhout
Period5/28/006/2/00

Fingerprint

Peat
Embankments
temperature effect
embankment
Thermal effects
peat
compression
Soils
peat soil
void ratio
temperature
soil
Temperature
Cooling
heating
cooling
overconsolidation
Heating
stress change
test

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Building and Construction

Cite this

Hanson, J. L., Edil, T. B., & Fox, P. J. (2000). Stress-temperature effects on peat compression. In Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112 (pp. 331-345). (Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112; Vol. 301). https://doi.org/10.1061/40552(301)26
Hanson, James L. ; Edil, Tuncer B. ; Fox, Patrick J. / Stress-temperature effects on peat compression. Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112. 2000. pp. 331-345 (Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112).
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Hanson, JL, Edil, TB & Fox, PJ 2000, Stress-temperature effects on peat compression. in Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112. Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112, vol. 301, pp. 331-345, United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112, Noordwijkerhout, Netherlands, 5/28/00. https://doi.org/10.1061/40552(301)26

Stress-temperature effects on peat compression. / Hanson, James L.; Edil, Tuncer B.; Fox, Patrick J.

Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112. 2000. p. 331-345 (Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112; Vol. 301).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Hanson JL, Edil TB, Fox PJ. Stress-temperature effects on peat compression. In Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112. 2000. p. 331-345. (Proceedings of the United Engineering Foundation / ASCE Geo-Institute Soft Ground Technology Conference - Soft Ground Technology, GSP 112). https://doi.org/10.1061/40552(301)26