ABSTRACT
Though shotcrete as an initial lining of a tunnel is a more reliable and economic measure, there is no further consideration on early-age behaviour of shooting steel fiber reinforced concrete (SFRC). This paper introduced the efforts done in a rock tunnel. To begin with practical use, experiment on composition of concrete matrix with local construction material had been investigated. A group of tests on several kinds of steel fibers, which manufactured in local company, had been conducted with the ASTM C1018 on its strength and toughness. Numerical analysis stressed on time-dependent behaviour of shot-SFRC as first lining for its properties evaluation with age. Practical application focuses on rock conditions and bracing way before shotcreting. Comparisons with in-situ stress and displacement measurements are given.
