Abstract
This paper investigates the relation between solidified shape and gel time of grout in the stratified deposits. Through the injection tests with the large injection apparatus, the main conclusions are summarized as follows; 1) In the stratified sandy deposits, the long gel time grout tends to permeate into the layer of which permeability is the largest. On the other hand, the short gel time grout generally permeates uniformly. 2) If the soft clay layer is contained in the stratified deposit, the injected grout tends to penetrate into the border between the clay and the sand or into the clay. Especially, in the case of short gel time grout, the most part of injected grout penetrates into the border or the clay, even if the injection point is in a sand layer. Therefore the permeated grout in sand layer is very little.
