Model Test on Lining Structure of Spray Steel Fiber Reinforced Concrete

Aiming at the problem of concrete lining supporting in soft rock tunnel, an experimental study on lining scheme of roadway model structure is carried out and the mix proportion of spray steel fiber concrete is optimized based on the principle of contrast test and model test. Optimal dosage of steel fibre and stress distribution in the model structure are obtained, and its stress mechanism is analyzed. The experimental results indicate that the lining structure of spray steel fiber reinforced concrete has better yield pressure deformation capacity, and it is suitable for soft rock supporting of deep buried tunnel and roadway.