Abstract
This study focuses on grounds with coefficients of permeability of 10-3cm/s or less in which grouting using ordinary cement is difficult, laboratory mixing tests and grouting tests were conducted on mixture of ultra fine-grained cement and kaolinite clay. Based on these tests, the authors were able to propose mixing proportions appropriate to the actual permeability of the ground. In addition, the authors have leaded an equation for estimating the penetration length of grouting. Furthermore, the method for design of the conditions of grout and pitch of grouting pipes, according to the estimated penetration length of grouting, is proposed.
