Abstract
In the Kushikino underground petroleum storage base, the largest underground rock caverns sealed by ground water have been under construction. Shotcrete is regarded as a permanent support in these petroleum storage facilities. A continuous setting method of durable and light GFRP grids, which are applied to the reinforcement for shotcrete in place of welded wire fabrics, with quenched staples using compressed air has newly been developed. This paper describes the reduction of extra shotcrete and the improvement of work productivity in the test construction at the temporary tunnel, and then the outline of the shotcrete work with GFRP grids at the rock caverns.
