... lining austria government geologist completion monitoring systems/intelligent wells italy government geological subdiscipline cable assessment operation geology reservoir geomechanics tunnel installation construction instrumentation cross-section information shotcrete lining europe...

... slowly lasting for one week, several months, or more than one year, after tunnel excavation is completed. Conventional rigid tunnel shotcrete linings, where rock deformations are strictly limited, are unable to work against great overburden pressure the excavation of which will almost systematically lead...

... the material properties m b , s and a . geology reservoir geomechanics benchmarking upstream oil & gas performance indicator tunnel excavation france government europe government paraview geological subdiscipline plaxis shotcrete lining strategic planning and management comparison...

... ABSTRACT: Yielding elements as a part of the shotcrete lining represent state-of-the-art tunnelling in overstressed weak ground conditions. These elements avoid overstressing of the shotcrete lining during the early curing process, where the displacement rates are highest and the shotcrete...

... characterization semmering base tunnel displacement overutilization mechanism construction sequence alternative numeric modelling austria government reservoir geomechanics calculation shotcrete lining conceptual support design criterion redistribution 15th ISRM Congress 2023 & 72nd Geomechanics...

... ABSTRACT: At sequenced tunnel drives, next to the rock mass conditions, the advance rates of the single excavation stages and the moment of ring closure determine the performance of shotcrete linings. Especially in heterogeneous rock masses, the investigation of the optimum ring closure moment...

... the design parameters and assumptions. europe government geological subdiscipline shotcrete lining geologist reservoir geomechanics geology reservoir characterization monitor rock mechanic assumption austria government technology graz university back-analysis procedure semmering base...

... government knowledge management geology calculation overburden shotcrete lining discontinuity deformation austrian society geological subdiscipline cavern hard rock cavern geologist europe government reservoir characterization construction consideration investigation skava consulting zt...

... shotcrete lining john arlberg road tunnel lot west hydraulic fracturing displacement figure 2 cohesion application resistance figure 6 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Are trigger levels useful for tunnels at high rock pressure? Max John...

... in Alpine tunnels over the last decades has shown that closed shotcrete linings can sustain a strain of approximately 0.8% to 1% without failure. Any strain above this value inevitably leads to failure of the lining, and thus a loss of resistance, causing additional displacements. Based on a large number...

... and parameters used for the numerical analyses, are given. Finally, the numerical results of the simulations performed are presented and discussed. Reservoir Characterization rock creep deformation profile creep axisymmetric tunnel shotcrete lining Upstream Oil & Gas axial thrust radial...

... at the OeBB Lainzer Tunnel lot LT 31. ground transportation shotcrete lining overburden evaluation gallery soft ground surface settlement rail transportation Moritz lainzer tunnel lt 31 geotechnical safety management knowledge management displacement Schubert excavation tunnel ring...

... consequence. Various approaches for a ductile support system appropriate for such geotechnical conditions have been proposed, developed and applied. The ductility of a shotcrete lining is usually ensured by integrating yielding elements. In order to prevent overloading of the young shotcrete, the elements...

... ABSTRACT In this paper, the strong interaction between the hardening shotcrete lining and the surrounding ground in NATM tunneling is investigated by means of axisymmetric analyses, accounting for the three-dimensional nature of the excavation process. The effect of the hydration of shotcrete...

... tunnel projects in which yielding support methods were applied was used. strength Rock mechanics lining support system deformation system behaviour shotcrete lining Schubert rock mass LSC ductile support method excavation tunnel displacement Alpine Tunnel application stress...

... does a shotcrete lining applied in a tunnel behave differently from the design ? ii. is it necessary to fill the overbreakings with shotcrete ? iii. is it necessary to have a smooth finished tunnel surface to meet the condition of design ? Answering those questions has significant importance...

... erforderlich Reservoir Characterization shotcrete lining baton projete der setzungen eingesetzt methode Setzungen zu erwarten soft rock Shotcrete Method construction Schildvortrieb full-face cutting und Auffahren veranderllch fester Keupergesteine im Vollschnitt und in der Spritzbetonbauweise...

... ABSTRACT: When driving the top heading for a railway tunnel it was possible, due to the small overburden, to study the behaviour of the fractured rock from above ground by means of deformation measurements and to compare them with the deformations of the shotcrete lining. Due to the low shear...

... SYNOPSIS: Experimental investigations of the strength and deformability of steel fibre reinforced shotcrete linings are presented. The tests show that there are several advantages associated with the use of high strength steel fibres with hooks in shotcrete linings: These fibres slip under...

... SUMMARY: The results of experimental and theoretical investigations of the static action of a shotcrete lining are presented. It is shown that the tensile adhesion to rock is the most important factor determining the failure mechanism and the carrying capacity of the lining. A thorough...