Grouting is performed to mechanically improve the deformation and strength characteristics of bedrock by filling cracks with cement so that the entire bedrock is integrated and homogenized. For verifying the improvement, however, only permeability is currently considered because it is difficult to track other mechanical properties. For this reason, today dam foundation design cannot fully account for improvements, even though many construction activities are carried out to improve the mechanical properties of dam foundations.
Against this background, we compared the results of borehole loading tests and indoor shear tests, 'before and after grouting. Based on the test results, the mechanical improvement of bedrock by grouting was characterized in order to develop a way to account for the mechanical improvement of bedrock in dam foundation design.
