This
paper analyzes the features of deep rock cracks and grouting technology. It
then studies the grouting technology with cement-silicate for controlling the
deep rock cracks.It particularly addresses the problems of grouting in deep
cracks in Jinping Ⅰ Hydropower.
First of all, the paper analyzes the mechanism of cement-silicate grouting.
Then, it investigates the cement-silicate slurry mainly from the aspects of gel
time and strength. It studies the influence law of gel time and strength from
the dosage of silicate and retarder. It obtains a design formula for
5min.cement-silicate slurry. Finally, the paper proposes the grouting method
using two pipe outlets for mixing the two grout fluids. One pipe outlet is for
the cement grout and the other for silicate grout.