Application of The Steel Fiber Reinforced Concrete on the New Pre-Lining Support Method

The New PLS (New Pre-lining Support) Method is one of pre-lining Method, in which the perimeter of the tunnel face is excavated with a chain cutter, and immediately reinforced with a concrete shell. This method is applied under the severe condition of urban area. It is considered that improving the deformation properties, ex. the thoughness, of concrete is important to apply this method under severer condition. In this paper, it is described that the property of the steel fiber reinforced shell-concrete using New PLS Method, and the result of the execution test.