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発表 Permeability and Mechanical Properties of Fine Sand Improved by Microbial Carbonate Precipitation

作成年度 2012 年度
論文名 Permeability and Mechanical Properties of Fine Sand Improved by Microbial Carbonate Precipitation
論文名(和訳)
論文副題
発表会 Twenty-second (2012) International Offshore and Polar Engineering Conference
誌名 Proceedings of the Twenty-second (2012) International Offshore and Polar Engineering
巻・号・回 Proceedings of the Twenty-second (2012) International Offshore and Polar Engineering
発表年月日 2012/06/01
所属研究室/機関名 著者名(英名)
川崎地質株式会社(元土質・振動チーム交流研究員)塚本 将康
土質・振動稲垣 由紀子
土質・振動石原雅規
土質・振動佐々木哲也
大阪大学小田和広
抄録
There is a ground improvement technology that utilizes carbonate calcium precipitated from carbon dioxide generated by microbial metabolism and calcium sources in pore of soil. It is known that the mechanical roperties of improved grounds correlate with the amount of calcium carbonate precipitation. However, the relationship between mechanical properties and permeability has yet to be clarified. In this study, we estimated the apparent coefficient of permeability from the injection speed of nutrient and performed triaxial compression tests (CD condition) on specimens, aiming to assess the relationship between the mechanical properties and permeability of Toyoura sand, which is compacted by microbial metabolism. Through the study, we confirmed that the Young’s modulus and peak strength tend to increase as a function of the amount of recipitated calcium carbonate, with little change in the coefficient of permeability.
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