In 1989, the Austrian Concrete Society pub-lished a Guideline on Shotcrete that subse-quently served as a reference work and a contractual basis for shotcrete works in tunnel con-struction in Austria and abroad. Other standards,such as DIN 18551, focused more strongly on shotcrete for concrete repair works. At the end of 1998, after several revisions, a new edition of the Austrian Guideline was published that also con-siders recent developments in the field of shot-crete technology. Dealing with a
whole range of issues, from base ma-
Shotcrete Red Hot in Peru
An1amina copper mine is a Sl.2 btltion projcc1 in lhe Andes Mountailh of Peru. The projeci. owned by Canadian mining gi3111S Norandll. J’cck and Rio Afgom, i.s one of the. single largest mining inveso:nents in 1be Americ:iô€€£ at this moment and oomprises the cons1ruction of an open pi1, a co11veyor runnel, a tailings dam. a mill and pon facilities for ¢1’por1 of processed concenlrllle all over the globe.
Round Determinate Panel Testing in Australia
Designers and contractors frequently encounter difficulties when using beams for the assessment of postcrack pcrfomumcc in fiberÂreinforced shotcrcte (FRS). llie most conimon bea,n test used in Nonh Anierica is the ASTM C-1018 procedure (AST!vl 1997), although alternatives exist, including the Japanese SF-4 procedure (JSCE 1984) and a multi rude of European national standards.
Moab Khotsong Mine, A Mining Engineer’s Perspective on the Application of Steel Fiber Reinforced Wetcrete as a Support Medium in an Ultra Deep Level Mine, Part 1
A Mining Engineer’s perspective on the Application of Steel Fiber Reinforced Wetcrete as a Support Medium in an Ultra Deep Level Mine.
Steel Fiber Reinforced Shotcrete Replaces Cast Concrete Lining, World’s Longest Subsea Road Tunnel
The Northcape Tunnel in the Artic Circle in Norway was opened for traffic on June 15, 1999. The project is the longest subsea road tunneltunnel (6820 m or22,000 fl) in the world un1il 1999/ 2()0(). TheNorthcapc¢Tunnel is part of 1he FATIMAÂProject, (he road connection from the mainland of Norway 10 the island of Mager!lya and 1he Northcapc. During the tunneling¢period, many probÂ
Shotcrete for Underground Support in Brazil
Shotcrete has been used in Brazil since the 1950s, mainly in minor works of slope stabilization and repairs in concrete structures. It was only in the 1960s that it started to be used in underground work. The Furnas Hydroelectric Project had some sections of its diversion tunnels, where the ground was a highly fractured and weathered quartzite, lined with steel bar reinforced shotcrete. The good perÂformance in Furnas led many other hydroelectric projects to adopt shotcrete lining in their tunnels, replacing previously specified cast concrete.
Shotcrete Applications at Northparkes E26 Mine
Shotcrete was used extensively during construction of Northparkes E26 Underground Mine, Australia’s first block cave mine. Applications for the shotcrete included ground support, ground control, construction, safety, protection of equipment and remedial repairs. This article details the various uses for the 16,700 m3 (22,000 yd3) of shotcrete applied at Northparkes, the experiences gained during conÂstruction, and discusses whether the design expectations have been achieved.