地下帯水層蓄熱法におけるコロイドダム工法

概要

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A new method of the construction of the colloidal dam in the aquifer utilizing the chamical reaction of Fe ion was investigated experimentaly, with the following results. (1) The clogging of the Fe (OH)_3 in the one-dimensional experiments decreased the permeability, when the water, enriched with Fe ion, flowed for a long time. But the clogging is crushed and swept out when the inverse pressure gradient of more than 1.0×10^4 [Pa/m] was added. (2) The apparent thermal diffusivity decreased together with the permeability of the aquifer in the experiments with the two-dimensional model. It shows that the regional flow of the ground water gets out of the way from the colloidal domain constructed in the aquifer. (3) The field experiments showed that Fe ion was stored in the aquifer, decreasing the apparent thermal diffusivity by the yearly cycles. After the infection and recovery teatment the colloidal dam grows in the shape of a doughnut in the region where the pressure-gradient is less than 1.0×10^4 [Pa/m] in the aquifer.
一般社団法人日本機械学会の論文
1988-11-25