CUED Publications database

Biogeochemical processes and geotechnical applications: Progress, opportunities and challenges

Dejong, JT and Soga, K and Kavazanjian, E and Burns, S and Van Paassen, LA and Al Qabany, A and Aydilek, A and Bang, SS and Burbank, M and Caslake, LF and Chen, CY and Cheng, X and Chu, J and Ciurli, S and Esnault-Filet, A and Fauriel, S and Hamdan, N and Hata, T and Inagaki, Y and Jefferis, S and Kuo, M and Laloui, L and Larrahondo, J and Manning, DAC and Martinez, B and Montoya, BM and Nelson, DC and Palomino, A and Renforth, P and Santamarina, JC and Seagren, EA and Tanyu, B and Tsesarsky, M and Weaver, T (2013) Biogeochemical processes and geotechnical applications: Progress, opportunities and challenges. In: UNSPECIFIED pp. 143-157..

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Consideration of soil as a living ecosystem offers the potential for innovative and sustainable solutions to geotechnical problems. This is a new paradigm for many in geotechnical engineering. Realising the potential of this paradigm requires a multidisciplinary approach that embraces biology and geochemistry to develop techniques for beneficial ground modification. This paper assesses the progress, opportunities, and challenges in this emerging field. Biomediated geochemical processes, which consist of a geochemical reaction regulated by subsurface microbiology, currently being explored include mineral precipitation, gas generation, biofilm formation and biopolymer generation. For each of these processes, subsurface microbial processes are employed to create an environment conducive to the desired geochemical reactions among the minerals, organic matter, pore fluids, and gases that constitute soil. Geotechnical applications currently being explored include cementation of sands to enhance bearing capacity and liquefaction resistance, sequestration of carbon, soil erosion control, groundwater flow control, and remediation of soil and groundwater impacted by metals and radionuclides. Challenges in biomediated ground modification include upscaling processes from the laboratory to the field, in situ monitoring of reactions, reaction products and properties, developing integrated biogeochemical and geotechnical models, management of treatment by-products, establishing the durability and longevity/reversibility of the process, and education of engineers and researchers.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:39
Last Modified: 18 Aug 2020 12:22