(Dam Engineering, Vol. XV, Issue 2, pp. 87–110).
This paper addresses the prediction of groutable joint apertures, grout penetration limitations, and possible grout take volumes per cubic metre of rock, as a result of 5 to 10 Mpa pre-injection pressures ahead of tunnels. Joints are obviously opened more than in the preceding lugeon tests, and many rock mass properties can apparently be improved if stable micro-cement based materials are used.
Groutable joint apertures, Penetration limitations, Pre-injection pressures, Tunnels, Microcement based materials
