TY - JOUR
T1 - Bio-Inspired Soil Improvement Using EICP Soil Columns and Soil Nails
AU - Kavazanjian, Edward
AU - Almajed, Abdullah
AU - Hamdan, Nasser
N1 - Funding Information:
Work described herein was supported by the National Science Foundation Geomechanics and Geosystems Engineering and Engineering Research Center programs under grants numbered CMMI-0830182, CMMI-1233658, and ERC-1449501. The authors are grateful for this support. Any opinions or positions expressed in this article are the authors only, and do not reflect any opinions or positions of the NSF .
PY - 2017
Y1 - 2017
N2 - Enzyme induced carbonate precipitation (EICP) for vertical columnar stabilization and soil nailing has been demonstrated in bench scale testing. In EICP, precipitation of calcium carbonate (CaCO3) is induced via hydrolysis of urea using free urease enzyme. The enzyme is introduced into the soil in an aqueous solution containing urea and calcium ions to precipitate CaCO3. The precipitated CaCO3 improves the strength and stiffness and increases dilatancy of the soil by filling soil pores, roughening the soil particles, and binding the particles together. EICP was used to improve soil around 51 mm- and 76 mm-diameter vertical perforated plastic pipes in 19 L buckets and a 1 m3 soil box, respectively. EICP solution was also injected through a 9.5-mm diameter perforated tube to create inclined columns to model soil nails. These tests demonstrate the feasibility of using EICP to create cemented soil columns for foundation support and soil nailing.
AB - Enzyme induced carbonate precipitation (EICP) for vertical columnar stabilization and soil nailing has been demonstrated in bench scale testing. In EICP, precipitation of calcium carbonate (CaCO3) is induced via hydrolysis of urea using free urease enzyme. The enzyme is introduced into the soil in an aqueous solution containing urea and calcium ions to precipitate CaCO3. The precipitated CaCO3 improves the strength and stiffness and increases dilatancy of the soil by filling soil pores, roughening the soil particles, and binding the particles together. EICP was used to improve soil around 51 mm- and 76 mm-diameter vertical perforated plastic pipes in 19 L buckets and a 1 m3 soil box, respectively. EICP solution was also injected through a 9.5-mm diameter perforated tube to create inclined columns to model soil nails. These tests demonstrate the feasibility of using EICP to create cemented soil columns for foundation support and soil nailing.
UR - http://www.scopus.com/inward/record.url?scp=85025471137&partnerID=8YFLogxK
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U2 - 10.1061/9780784480793.002
DO - 10.1061/9780784480793.002
M3 - Conference article
AN - SCOPUS:85025471137
SN - 0895-0563
SP - 13
EP - 22
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
IS - 288 GSP
T2 - 5th International Conference on Grouting, Deep Mixing, and Diaphragm Walls, Grouting 2017
Y2 - 9 July 2017 through 12 July 2017
ER -