... Reservoir Characterization Upstream Oil & Gas cavern service tunnel metals & mining displacement dimension reservoir geomechanics sylvinite Thickness pressure tunnel Artificial Intelligence overstressed zone underground excavation horizontal stress rock mass topography...

... Reservoir Characterization TBM pressure tunnel Upstream Oil & Gas prediction Drakensberg rig cavern complex elevation drivage access tunnel alignment scheme alignment geology probe drilling tunnel drilling operation correlation investigation excavation construction...

... fracturing tests. EMPIRICAL CRITERIA As of today, more than 70 unlined pressure shafts and pressure tunnels with heads exceeding 150 metres are in operation in Norway. A few but serious failures of such shafts in the past have clearly illustrated the importance of rock cover - the shaft must have...

... ABSTRACT The rock engineering aspects of the concrete lined pressure tunnels for the Drakensberg Pumped Storage Scheme covering investigation, design and construction are described. The scheme has an operating head of some 500m and is located in a near horizontally bedded sedimentary rock...

... SUMMARY: In a project of Shimogo pumped storage hydro power station of 1,000 MW, a tunnel boring machine was employed to excavate the inclined pressure tunnel of the penstock. The tunnel has been completed with 5,8 m diameter and at 37° inclination angle. This performance was the first success...

... steel lining energy loss tunnel Reservoir Characterization pressure tunnel lining water level water pressure shaft power station kroner sima power plant supply system surge shaft operation air cushion chamber unlined tunnel HIGH PRESSURE TUNNEL SYSTEMS AT SIMA POWER PLANT...

... the tunnel profile from a load-exerting into a load-carrying member of the system. The lining structures of the pressure tunnels with large internal pressures are designed function of the amount of the preesure load which can be transfered to the rock mass. Basically. both unreinforced and reinforced...

... these tunnels and underground powerhouses valuable experiences have been gained. Also special techniques and design concepts have during the years been developed. One such Norwegian speciality is the unlined high pressure tunnels and shafts, which this paper will describe. valley side layout design...

... SUMMARY The high-pressure-tunnel for the hydroelectric plant Roβhaupten was built in 1951/52. The 424 m long hydraulic tunnel has an internal diameter of 8.35 m. The final lining of the hydraulic tunnel covers a length of 245m. after the prestressing procedure. with core ring lining according...

... stretches, an overview of the results. The conclusions arrived at are generally applicable to pressure tunnels; in particular, an analytical-experimentaldesign methodology for tunnels with pressure grouting is formulated. ZUSAMMENFASSUNG: Als Lösung zur Sicherung der Undurchlassigkeit und Stabilitat der...

... interaction de la nasse rocheusse dans l''action des charges internes. INTRODUCTION This paper presents results and conclusions drawn from and extensive study entitled "Load-sharing by Rock Mass, Concrete and Steel in Pressure Tunnels and Shafts of Pumped Storage Plants" carried out by the Structural...

... SUMMARY: In calculating the stresses in the lining of a pressure tunnel with circular cross-section, it is generally assumed that the deformability of rock masses follows the theory of elasticity. However, this assumption does not often consist with the real characteristics of rock masses...

... into operation (Broch and Selmer-Olsen 1982). Detailed planning of the Mauranger project started in 1970. The failure of a 300 metre static-head unlined pressure shaft at Brokke Power Plant in 1968 (Selmer-Olsen 1970), and then the failure of a 200 metre static-head unlined pressure tunnel at Åskåra Power Plant...

... of this nature, it is imperative to correctly represent the basic factors which affect the mechanical behavior of the rock. reservoir geomechanics storage powerplant tailrace tunnel Upstream Oil & Gas calculation pressure tunnel natural gas storage cavern geomechanical study storage cavern...

... SUMMARY Analysis for pressure tunnel lining considering its working together with adjoining rock mass can be devided into several different problems which are discussed in the paper. Physical geomechanical modelling, laboratory investigations on material properties and numerical analysis...

... (see Dolcetta 1971 a, 1971 b, 1972). On the one hand, this minimizes the inertia of the hydraulic system by shortening the length of pressure tunnels, and at the other it solves, in a satisfactory manner, all the problems related to the preservation of environment, and to the availability of areas...