Laboratory tests on steel fiber reinforced concrete and their application example on structural performance of tunnel lining

Abstract

The purpose of this research is for studying the performance of Steel Fiber Reinforced Concrete (SFRC) in construction works such as building, bridge, tunnel, etc,. It will present the performance of SFRC with and without super plasticizer by laboratory test on compression, bending and tension test in cube, beam and briquette respectively. The characteristic of SFRC will be found and compared with plain concrete. Next, all of characteristic of SFRC from the test will be applied to the tunnel lining design. The tunnel project case study which is used for this research will be excavated into thick-bedded fine sandstone, locally interbedded with very thin stratified mudstone. In this paper will use the basic parameter of soil from tunnel’s site at Huay Lam Phan Ngai Hydropower project (Laos), and apply the basic parameters of material from the laboratory test into Finite Element Method software to analyze and design the performance of lining. Four sizes of tunnel diameter had been applied to the analysis with 0.5 m thickness. This research concerns only the load from the soil, and checks the strain of tunnel lining at crown, invert and spring line of tunnel with the tensile strain from laboratory test.