Recent development in biogeotechnology and its engineering applications

Abstract

Microbial geotechnology or biogeotechnology is a new branch of geotechnical engineering. It involves the use of microbiology for traditional geotechnical applications. Many new innovative soil improvement methods have been developed in recent years based on this approach. A proper understanding of the various approaches and the performances of different methods can help researchers and engineers to develop the most appropriate geotechnical solutions. At present, most of the methods can be categorized into three major types, biocementation, bioclogging, and biogas desaturation. Similarities and differences of different approaches and their potential applications are reviewed. Factors affecting the different processes are also discussed. Examples of up-scaled model tests and pilot trials are presented to show the emerging applications. The challenges and problems of biogeotechnology are also discussed.

Graphical abstract

Keywords

biogeotechnology / biocementation / bioclogging / biogas / strength enhancement / liquefaction mitigation / seepage control

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Acknowledgements

The authors would like to thank the financial support through No. MOE2015-T2-2-142 provided by the Ministry of Education, Singapore, No. SMI-2018-MA-02 by the Singapore Maritime Institute, No. L2NICCFP2-2015-1 by the Singapore Ministry of National Development, and the support of Centre for Urban Solutions, Nanyang Technological University.

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