Proceedings of the Korean Society of Soil and Groundwater Environment Conference (한국지하수토양환경학회:학술대회논문집)
- 2001.04a
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- Pages.66-69
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- 2001
Placement of Colloidal Silica gel for the construction of a subsurface containment system
- Kim, Meejeong (En3 Co., Ltd.) ;
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Park, Joo-Yang
(Dept. of Civil Engr., Hanyang University)
- Published : 2001.04.01
Abstract
A subsurface containment system which is constructed by pumping a gelling liquid (Colloidal Silica) into the unsaturated medium is investigated by developing a mathematical model and conducting numerical simulations. The proposed model is verified by comparing experimentally and numerically determined hydraulic conductivities of gel-treated soil columns at different Colloidal Silica (CS) injection volumes. The numerical experiments indicate that an impermeable gel layer is formed within the time period twice the gel-point. At the Same normalized time, the CS solutions with lower NaCl concentrations result ill further migration and poor Performance in plugging the pore space.