... Abstract A concern during the design of an undrained tunnel lining is the possibility of a high groundwater pressure occurring behind the lining. If the lining is applied only to the tunnel walls and crown, flow to the invert may cause a pressure alleviation, possibly enhanced by an excavation...

... tunnels to determine similarities and differences. reservoir characterization structural geology gotschna tunnel road tunnel reservoir geomechanics upstream oil & gas correlation counter pressure mpa sulphate-bearing rock ground transportation steiner eurock 2020 heave lining...

...]. reservoir simulation davila mendez procedia engineering 191 tunnel axis foliation strike orientation Upstream Oil & Gas numerical simulation strike perpendicular rock mass relative orientation foliation orientation Magnitude displacement lining dip angle foliation perpendicular...

... the westbound tunnel holds a length of 924.0 m except for a few meters thick fill. The tunnels were excavated within the Trakya Formation bedrock having very weak and weathered rock mass sections. In addition, the twin tunnels were passing under a densely populated district, city water lines, crossing roads...

... ABSTRACT: More recently, the demand for application of segmental tunnel lining has been raised for both long & deep tunnel in rock and shallow tunnel in soft ground, particularly in urban areas. From technical and economical points of view, a proper dimensioning of the segmental lining has...

... The Semmering Base Tunnel (SBT) is situated in Eastern Austria and is part of the Baltic-Adriatic Corridor, which is one of the most important cross-Alpine lines in Europe. Based on extensive geological investigation in the station and alignment selection procedure and environmental impact assessment a detailed...

... m and the 2800 m long Silvretta high pressure tunnel. The maximum overburden is roughly 1100 m. Both the inlet tunnel and the Silvretta high pressure tunnel are lined with pre-casted segmental linings in the invert and an in-situ concrete shell. The last 600 m of the Silvretta tunnel are first lined...

...) Uncertainties in the ground model and its consequences on the design Inner lining and the long-term stability of the primary support TBM and pre-cast concrete segments Pressure water conduits 2 STRUCTURAL DESIGN OF SHOTCRETE LININGS 2.1 Motivation After a period of coexistence with former...

... percent of clay is selected for physical modeling, as the PoP alone shows brittle behavior. It is interpreted that the height of overburden is a critical factor in correlating degree of fracture and damage to the tunnel - lining. Series of experiments are carried out with lining materials and litho-static...

... ABSTRACT: A pilot scale research was carried out to verify the feasibility of compressed air storage in lined rock cavern. Two caverns with a diameter of 6m were excavated at a depth of 100 m below the surface ground in a mine. This paper presents assessment technologies of geomechanical...

... stresses a good match of the calculated and the observed displacement pattern was found. 1 INTRODUCTION The Semmering Base Tunnel (SBT) is situated in Eastern Austria and is part of the Baltic-Adriatic Corridor, which is one of the most important cross-Alpine lines in Europe ( http://www.baltic...

... obtained results such as deformations, strains, stresses, pore pressure, utilisation, forces in the deformation elements and lining sectional forces etc. are time dependent. In order to achieve an acceptable system behaviour, the support measures had to be adjusted to the considered rock conditions...

... alternative as suggested by Vermeer et al. (2002). This procedure leads to an estimate of the relaxation factor, which allows to reproduce the 3D subsidence phenomena using a 2D analysis. However, the so calibrated λ-value does not guarantee the match of lining forces and displacements as calculated...

... conditions are commonly associated with high loads and massive deformation of the lining. The idea of using ductile elements in the lining has become a well-known practice in such conditions. During the last century, different solutions have been developed. In this paper, the focus is on Telescope-Yielding...

... concrete lining for those parts of the tunnels, which will be used as tailrace tunnels are underway. The present paper describes the present conditions of diversion tunnels No. 1 & 2 and explains the procedure used for stress analyses of tailrace tunnel No. 1 without and with the new lining, which, has...

... consists of a 2.81 km long concrete lined 7.5 m diameter horseshoe section headrace tunnel leading to a 58.0 m high surge shaft of 18.0 m diameter. Pressure shaft of 6.4 m diameter takes off from the surge shaft and is designed for a maximum discharge of 185.0 cumecs, 6.4 m diameter pressure shaft...

... used at that time, which based on a stiff temporary timber support, was unable to bear the extreme pressures acting on the tunnel lining. Almost a century later construction of a road base tunnel was performed according to NATM allowing large deformations by leaving longitudinal slots in the primary...

... separately. In almost all areas a prediction of materials and structural components towards lifetime exists. System-wide investigations were rarely performed, so that there is no technical lifetime consideration of the outer lining in systems included. cross passage long-term behaviour rock bolt...

... revealed that a landslide was occurring, loading the gallery lining. As stabilization of the slope was not an option for several reasons, it was decided to replace the gallery by a new one deeper inside the slope, which will be ready for operation in 2017. Thus the old gallery has to be kept in operation...

... new emergency bay ground transportation safety passageway shotcrete general renovation tunnel emergency bay Arlberg Road Tunnel construction work construction traffic supply air duct lining excavation work installation ?? ABSTRACT: The Arlberg Road Tunnel with a length of almost 14...