Recently, urethane grouting methods have been employed frequently on many construction works, especially in mountain tunneling, such as urethane forepoling for ground improvement, or urethane grouting for water tight. However, as far as the authors aware, for evaluating the grouting process, relation between solidified shapes of urethane grout and actual ground conditions has not yet been investigated.
In this study, urethane grouting tests on cut slope of weathered granite and decomposed weathered granite embankment were carried out. After injection, treated blocks formed by urethane and soil or rock were excavated out and examined for evaluating the effects of grouting.
As a result, it was confirmed that cylindrical type or plain board type blocks might be formed by urethane injection in actual ground. The shapes of the blocks were controlled by permeability and strength of the fissured grounds.