... Abstract The geotechnical design of the tunnel consists of adequately establishing the geotechnical model, with a characterization of both the parameters of the intact rock and the rock mass, which allows the application of different geomechanical classification methodologies, as well...

... by the extraordinary page-wide equations for ‘c’ and ‘φ’ so no software is needed. The incorrect addition of these components of shear strength (as indeed in Mohr-Coulomb) in commercial continuum codes is the final source of error of so many analyses. So-called plastic zones are exaggerated around tunnels, and rock...

... river gravel tunnel nica variation engineering aydan IIXX LLaattiinnAAmmeerricicananRRocokckMMecehcahnaicnsicSsymSypmospiuomsium I©X 2S0im22pIoSsRioML,aIStiBnoNa9m7e8r-i9c9a9n2o5-d3e-8M74e-c6ánica de Rocas IAXsuLnactiinónA-mPaerriacagnuaRyock Mechanics Symposium October 16-19, 2022 ISRM...

... Abstract Chemical reaction between anhydrite and water results in the formation of gypsum followed by a significant increase in the volume of the rock mass. Tunnel excavation enables increase of water conductivity around the underground opening which, superimposed to the impact of unloading...

... Abstract The T4 tunnel constructed within the scope of the Ankara - İzmir High-Speed Train Project (Western Part of Turkey), is 2350 m long. While the excavation works in the tunnel were continuing, cracks occurred in the sections where the ring was closed, and invert concrete was completed...

... using photographic images of in situ stratified heterogeneous rock masses with image processing technology, fractal theory and the geomechanic analysis for joins. Using the GSI system to characterize the jointed rock mass around the Guillermo Gaviria Echeverri or El Toyo Road tunnel, Antioquia, Colombia...

... Abstract The Castelo do Bode hydraulic tunnel is part of the Lisbon water supply system. During its construction a monitoring system was implemented, aiming at monitoring the behaviour of the concrete tunnel lining and of the surrounding rock mass, and including visual inspections. This work...