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INVESTIGATION ON DAM FOUNDATION GROUTING PROCESS (2006)
In dam rock foundations, grouting is performed to improve water-tightness and reinforce weak parts. It is difficult to accurately estimate the improvements brought about by grouting, because the grouting is applied in the rock mass where it is not visible. Recently, research on optimum grout mixtures has advanced and a system that can automatically change the grout mix proportion has been developed. It is possible to change the grouting specifications in order to shorten the injection duration time, if the injection process can be predicted from early grout injection process data. In this paper, we propose a mathematical model, which expresses the injection process of the grouting. Then, we predict the injection duration time and quantity, etc., from early injection process data of the consolidation grouting of an existing dam, using the proposed model and examine the validity of the model.
4th Asian Rock Mechanics Simposium (ARMS2006)
Public Works Research Institute, Japan