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A platform for research: civil engineering, architecture and urbanism
Direct Shear Strength of Biologically Cemented Gravel
Biogrouting is a new potentially sustainable ground improvement method. The process of biogrouting involves carbonate precipitation induced by microorganisms (MICP) e.g. by hydrolysis of urea. In the summer of 2010, biogrouting was applied for the first time in practice to reduce the risk of borehole collapse during horizontal directional drilling in gravel layers. Within this project several gravel columns were treated in the laboratory in order to evaluate the potential of MICP to strengthen gravel and to determine the minimum required amount of cement to prevent borehole collapse. Although it proved to be difficult to produce homogeneously cemented gravel columns a correlation was established between the amount of calcium carbonate and the direct shear strength for different loading conditions.
Direct Shear Strength of Biologically Cemented Gravel
Biogrouting is a new potentially sustainable ground improvement method. The process of biogrouting involves carbonate precipitation induced by microorganisms (MICP) e.g. by hydrolysis of urea. In the summer of 2010, biogrouting was applied for the first time in practice to reduce the risk of borehole collapse during horizontal directional drilling in gravel layers. Within this project several gravel columns were treated in the laboratory in order to evaluate the potential of MICP to strengthen gravel and to determine the minimum required amount of cement to prevent borehole collapse. Although it proved to be difficult to produce homogeneously cemented gravel columns a correlation was established between the amount of calcium carbonate and the direct shear strength for different loading conditions.
Direct Shear Strength of Biologically Cemented Gravel
Paassen, L.A. van (author) / Hemert, W.J. van (author) / Star, W.R.L. van der (author) / Zwieten, G. van (author) / Baalen, L. van (author)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 968-977
2012-03-29
Conference paper
Electronic Resource
English
Direct Shear Strength of Biologically Cemented Gravel
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