Stress Distribution and Fabric Anisotropy of Heated Backfill
Publication: Geo-Congress 2023
ABSTRACT
The goal of this study is to reveal the multiscale mechanism soils undergo during heating of retained backfill. Free-drainage soils surrounding energy piles or retained behind thermo-active tunnels or retaining walls experience heating/cooling due to heat exchange with the ground. Soils, therefore, expand/contract, rotate, displace, and change its stress state, which results in changing the lateral earth pressure experienced by piles/walls. To study the particulate mechanism of such stress state change, a two-dimensional (2D) discrete element model is utilized. The retaining wall is modeled numerically using a rigid wall, while the soil is represented by circular disks with varying particle sizes. The backfill was prepared by means of pluviation. Upon setting up the initial model, the temperature of the retaining wall is gradually changed, and the lateral earth pressure during different simulation stages is monitored. The results show that heating the modeled cohesionless backfill increases the at-rest lateral earth pressure. Finally, the evolution of the lateral earth pressure with temperature is justified by the heating-induced anisotropy within the heated backfill.
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REFERENCES
Abdelaziz, S., and Ozudogru, T. Y. (2016). “Non-uniform thermal strains and stresses in energy piles.” Environmental Geotechnics, Vol. 3, No. 4, pp. 237–252.
Abdelaziz, S. L., Olgun, C. G., and Martin, J. R. (2015). “Counterbalancing ambient interference on thermal conductivity tests for energy piles.” Geothermics, Vol. 56, No. 1, pp. 45–59.
Benoît, J., Reiffsteck, P., and Getchel, A. In situ empirical determination of earth pressures at-rest.
Borsetto, M., Cricci, D., Hueckel, T., and Peano, A. (1984). “On numerical models for the analysis of nuclear waste disposal in geologic clay formations.” Numerical Methods for Transient and Coupled Problems, Swansea.
Bourne-webb, P. J., Amayta, B., Soga, K., Amis, T., Davidson, C., and Payne, P. (2009). “Energy pile test at Lambeth College, London: geotechnical and thermodynamic aspects of pile response to heat cycles.” Ge´otechnique, Vol. 59, No. 3, pp. 237–248.
Campanella, R. G., and Mitchell, J. K. (1968). “Influence of temperature variations on soil behavior.” Journal of the Soil Mechanics and Foundation Division: Proceeding of the American Society of Civil Engineers, Vol. 94, No. 3, pp. 709–734.
Darbari, Z., Jaradat, K. A., and Abdelaziz, S. L. (2017). “Heating–freezing effects on the pore size distribution of a kaolinite clay.” Environmental Earth Sciences, Vol. 76, No. 20, pp. 713.
Hueckel, T., Borsetto, M., and Peano, A. (1988). “Modelling of coupled thermo-elastoplastic-hydraulic response of clays subjected to nuclear waste heat.” ISMES publ./Inst. sperimentale modelli e strutture (Bergamo, Italia).
Jaradat, K. A., and Abdelaziz, S. L. (2018). Temperature-Dependent Load-Displacement Curves of Heat Exchanger Piles in Sand. IFCEE 2018. Orlando, Florida, USA.
Jaradat, K. A., and Abdelaziz, S. L. (2019). “Thermo-Mechanical Triaxial Cell for Rate-Controlled Heating-Cooling Cycles.” Geotechnical Testing Journal, Vol. 43, No. 4, pp. 1022–1036.
Jaradat, K. A., and Abdelaziz, S. L. (2020). “Heating-induced creep and potential creep rupture of clay liners for nuclear waste repository”. In E3S Web of Conferences, San Diego, CA. EDP Sciences, 10002.
Jaradat, K. A., Darbari, Z., Elbakhshwan, M., Abdelaziz, S. L., Gill, S., Dooryhee, E., and Ecker, L. (2017). “Heating-freezing effects on the orientation of kaolin clay particles.” Applied Clay Science, Vol. 150, No. 1, pp. 163–174.
Lee, J., Lee, D., Park, D., Kyung, D., Kim, G., and Kim, I. (2016). “Effect of freezing and thawing on K0 geostatic stress state for granular materials.” Granular Matter, Vol. 18, No. 1, pp. 69.
Matsuo, M., Kenmochi, S., and Yagi, H. (1978). “Experimental study on earth pressure of retaining wall by field tests.” Soils and Foundations, Vol. 18, No. 3, pp. 27–41.
Mindlin, R. D., and Deresiewics, H. (1953). “Elastic spheres in contact under varying oblique forces.” ASME Journal of Applied Mechanics, Vol. 20, No. 1, pp. 327–344.
Mitchell, J. K. (1969). “Temperature Effects on the Engineering Properties and Behavior of Soils.” Special Report - Highway Reserach Board (HRB), Vol. 103, No. 1, pp. 9–28.
O’Sullivan, C. (2011). Particulate discrete element modelling: a geomechanics perspective. Taylor and Francis.
Olgun, C. G., Abdelaziz, S. L., and Martin, J. R. (2013). “Long-term performance and sustainable operation of energy piles.” In ICSDEC 2012: Developing the Frontier of Sustainable Design, Engineering, and Construction, pp. 534–542.
Olgun, C. G., Ozudogru, T. Y., Abdelaziz, S. L., and Senol, A. (2015). “Long-term performance of heat exchanger piles.” Acta Geotechnica, Vol. 10, No. 5, pp. 553–569.
PFC2D. (2021). Particle flow code in two-dimensions. Itasca Consulting Group,. 7.0 ed. Minneapolis, MN, USA.
Satake, M. (1983). “Fundamental quantities in the graph approach to granular materials.” Studies in Applied Mechanics, Vol. 7, pp. 9–19.
Tanaka, N., Graham, J., and Crilly, T. (1997). “Stress-strain behaviour of reconstituted illitic clay at different temperatures.” Engineering Geology, Vol. 47, No. 4, pp. 339–350.
Thota, S. K., and Vahedifard, F. “Effect of Elevated Temperatures on Lateral Earth Pressures in Unsaturated Soils”. In E3S Web of Conferences, San Diego, CA. EDP Sciences, 04014.
Wuebbles, D., Fahey, D., Hibbard, K., Dokken, D. J., Stewart, B. C., and Maycock, T. K. (2017). U.S. Global Change Research Program Climate Science Special Report (CSSR).
Yang, R., Li, X., Xie, D., and Meng, H. (2022). “Analysis of Situ Test Results of Earth Pressure and Pile Internal Force under Pile-Anchor Support in a Deep Foundation Pit in Xi’an”. In Journal of Physics: Conference Series. IOP Publishing, 012051.
Yimsiri, S., and Soga, K. (2010). “DEM analysis of soil fabric effects on behaviour of sand.” Ge´otechnique, Vol. 60, No. 6, pp. 483–495.
Zeinali, S. M., and Abdelaziz, S. L. (2021). “Thermal consolidation theory.” Journal of Geotechnical and Geoenvinronmental Engineering, Vol. 147, No. 1, pp. 04020147.
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Geo-Congress 2023
Pages: 221 - 229
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Published online: Mar 23, 2023
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