2018 Volume 13 Issue 2 Pages 135-147
A permeability evaluation method of micro-particles was introduced in this study to establish efficient micro-particles permeation methods for liquefaction countermeasure. Since permeability of micro-particles is closely related to that of soil, a pore strongly contributing to permeability of soil was defined as “representative pore diameter”. First, effectiveness and problems of the Creager equation were discussed through the results of permeability tests with mixed sand and matrix-void ratio, where “representative pore diameter” is assessed by distribution of particle sizes. Next, an estimation method to obtain “representative pore diameter” from permeability coefficients was suggested and the estimated “representative pore diameter” was defined as “pore index”. Its applicability was verified from the result of permeability test with variously mixed sand. Finally, permeation tests using micro-particles were carried out and an evaluation to determine the permeability by the pore indexes and the uniformity coefficients was proposed.
