For that u need some rates of following items:- 1. Material cost for Shotcrete. 2. Batching , mixing and laying of concrete charges(Including Batching Plant, transit Mixer, Labour, electricity etc.)

Else u can get lots of information about shotcrete on Civil Engineer Forums containing topics like "Large hydro projects" "Hydro power technology"

Shotcrete is a technology used in large hydro power projects like Nathpa Jhakri (HP) , Chutak hydro electric project (kargil)...... basically shotcrete mix is sprayed through a machine called as...