... Abstract We propose a computational method for assessing bolt reinforcement of the tunnel face in cohesive frictional soils and weak rocks under seepage flow conditions. The method is based on limit equilibrium factors and can be applied to reinforcement layouts that are arbitrary in terms...

... prediction method, analyses electric fields through the tunnel-ahead rock mass between sensors attached to the tunnel face. TEPS requires approximately two hours overall for measurements and analyses, and it predicts 3–4 times the tunnel diameter ahead of the tunnel face. In this study, tunnel-ahead...

... by this technique, however, is poor as the tunnel overburden becomes large. In response to this problem, the authors developed a new survey method in which drilling vibration data were used, called tunnel seismic probe drilling (T-SPD), to estimate the seismic wave velocity distribution ahead of the tunnel face so...

... Zone Reservoir Characterization calculation tunnel face repository Calculation Method equation gsi calculation determination kovács Hoek Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1...

.... This monitoring study in the immediate vicinity of the tunnel face is the first one in the world so far within the knowledge of the authors. In this paper, the authors describe the several monitoring studies and the results obtained so far. They also discuss the implications of this study within the integrated...

... that the equilibrium points obtained by 3-dimensional analysis which represents advance of the tunnel face have deviations from those by 2-dimensional (plane strain) analysis. Final ground displacement and final support pressure obtained by 3-D analysis might be bigger than the values by 2-D analysis. But the reason...

... waste management tunnel face Tunnel Face Stability Investigation safety value calculation stability geometry stability analysis nuclear power plant hand calculation numerical analysis water pressure rock mass safety mecsekérc zrt Fault Zone Abstract The first underground...

... deformation tunnel face steel pipe tunnel shotcrete poligon station injection shotcrete thickness ABSTRACT: The main structure of the Poligon station, which is situated on route of Üçyol- Üçkuyular line as part of Izmir subway development works consists of diaphragm wall. Under the diaphragm wall...

... landslide-sliding surface inclinometer size twin tunnel tunnel face warning systems tunnel excavation landslide response excavation tunnel monitoring landslide displacement rate interpretation cross section ABSTRACT: The interaction between deep seated landslides and infrastructure...

... Abstract As only a small part of the tunnel face of a TBM-driven tunnel can be inspected visually, a photographic documentation was tested, in order to get a more holistic picture. For this purpose a standard photographic camera was installed in one of the manholes of the cutterhead. During...

..., installed during excavation above and around the crown of the tunnel face. The Umbrella Arch can consist of a variety of support ele- ments, however, for the purposes of this paper, a UA system with forepole elements was investigated. Fore- pole temporary support elements are installed when a difficult...

... the tunnel face in the beginning, and turn to a stable state at 2 3D away from the tunnel face; the pre-displacement of the surrounding rock accounting for 30% of the total displacement. Thereby, sufficient attention must be paid to the pre-displacement of the surrounding rock in design and construction...

.... Introduction Tunnel face stability is a big concern in tunneling excavated in soils or soft rock masses, because it is the source of many collapses. For tunneling in soils, it is common to employ EPB or Slurry TBM, whereas excavation methods without face support and with great cross sections are often used...

... Upstream Oil & Gas RME metals & mining TBM shale asturia Reservoir Characterization methane tunnel face emiliano formation oviedo Pajare tunnel emission excavation tunnel Excavability structural geology injection correlation instability Bieniawski north portal Rock...

... Abstract In this study, Tunnel Seismic Prediction method (TSP) was used to predict the geological condition ahead of the tunnel face. The tunnel which extends 44.6 km is intersected by several major faults and few lineaments. The ability of the TSP system was investigated to predict one...

... the arch effect by (Lunardi, 2000). This aid in stress flow is said to minimize pressure at the tunnel face. In order to attempt to determine the true impact of a forepole umbrella on an excavation, an extensive 3D numerical model is needed. The unique behaviour of a longitudinal face support element...

... hydraulic fracturing orientation Artificial Intelligence Upstream Oil & Gas fracture mapping swedish nuclear fuel equation of state Terzaghi Terzaghi correction factor eurock 2012 Stockholm tunnel face fluid modeling complex reservoir natural fracture borehole correction...

... normalized displacement boundary condition plastic zone means plastic radius tunnel section rock mass deformation displacement tunnel face excavation normalized plastic radius numerical model Tunnel Stability eurock 2012 Convergence Confinement Method Extending the Convergence...

... Tunnel face stability in narrow water-bearing fault zones S. Zingg, G. Anagnostou ETH Zurich, Zurich, Switzerland Abstract: Tunnel engineers understand under the term "fault zone" to mean a tunnel section of limited length requiring special measures and involving considerable delays and high costs...

... support system lining final lining Reservoir Characterization overstress tunnel face final lining loading Upstream Oil & Gas temporary support measure shotcrete creep time-dependent load geomaterial hydrostatic pressure construction Rock Mechanics in Civil and Environmental...