... ABSTRACT: Large scaled model tests were carried out to study the short-term deformation behavior of the arch-shaped tunnel which was constructed by cut-and-cover method without compaction effort for backfill material. Earth pressures acting on the tunnel lining and displacements of the lining...

... complete a waiting for the moment when the works will start again. The map from Figure 1 illustrates the underground lines in Bucharest city, having the approximately area of a circle with a diameter of about 22 km. The beginnings of designing (1975) and works for the metro network in Bucharest...

..., concrete lined aqueduct which required tight settlement restrictions within this region. The FLAC program, utilising established geotechnical design parameters, provided settlement predictions by modelling a single tunnel geological section. Adaptations for a three-tunnelled system subsequently presented...

... plutonic rock lining transverse range tunnel rock type construction ABSTRACT: The Los Angeles Metro Rail is among the world"s most technically advanced mass transportation systems. The Metro Rail subway project has presented unique types of challenges in the past, during design...

... strength steel requirement shotcrete tunnel lining metals & mining shotcrete lining lining soft lining Thickness ductility excavation construction materials deformation stiffness tunnel relative stiffness soft ground tunnel lining tunnel lining design ABSTRACT...

... are applied for bigger tunnels. Another one is the early closure of the lining, providing a high support resistance close to the face. Reservoir Characterization prediction lining excavation Rotterdam Graz stress controller tunnel Rock mechanics proceedings application Fault Zone short...

.... INTRODUCTION Since the advent of the New Austrian Tunneling method (NATM) due to Rabcewicz and Golser (1973), use of bolting as a lining support has become more and more popular in tunneling projects, encouraged by the real efficiency observed on site. However, it turns out to be rather difficult to account...

... ABAQUS software, have been performed to investigate settlement profiles for single and multiple shallow tunnels in London Clay. The Modified Cam-clay plasticity soil model with non-linear porous elasticity has been adopted in the analyses. The Hypothetical Modulus of Elasticity (HME) soft lining approach...

.... The paper describes the changes made due to the new techniques and the construction of the second shaft. Stress and convergence measurements on the lining are discussed. Finally conclusions are drawn and the future underground construction work is outlined. INTRODUCTION The R&D programme for finding...

... lining Soil property geotechnical problem RELI ABI LITY ANA LYS IS FOR GEOTECHNIC AL PR OBLEMS VI A FIN ITE ELEMENTS - A PRA CTI CAL APPLI CATI ON R. Thurne r1 and H. F. Sc hw eiger1 ABSTRACT This paper presents some preliminary results from a comprehensive study on the application of the finite...

... Upstream Oil & Gas Siltstone rehabilitation Reservoir Characterization clay schist knowledge management strength steel rib rockbolt highway tunnel structural geology primary support lining construction settlement case study serpentinite region II shotcrete flysch tunnel...

... but act plasticaly and are squeezed into excavations where they are exposed. This has resulted in the structural failure of the concrete lining of the shaft and a shortening of the vertical axis in its barrel. An unacceptable risk in the safe operation of the shaft system was thus created. This paper...

... excavation tunnel deformation criterion variation lining carnallite tachyhydrite ABSTRACT: An approach to the study of four practical problems of rock engineering using a micro-computer program is presented. The intent is to illustrate how a computer model, in these cases involving simple...

.... While high compressive stresses and strains would cause problems in a shaft pillar, total extraction of the near shaft reef will result in a dislocation to the line of the shaft at the reef intersection and the shaft axis is placed in a state of induced tension. Three dimensional boundary element...

... mechanical property rock mass secondary rigid support strength support method lining shear stress support system Reservoir Characterization support structure rigid support soft rock soft rock property ground pressure construction process deformation Rock at GreatOepth, Maury & Fourmaintraux...

... ABSTRACT: Hydraulic tunnel 48.3 Ian long has been constructed at the depths up to 1.5 Ian in extremely difficult rock conditions. During the first several years of operation severe damages to the lining occurred in some parts of the tunnel, obviously due to different phenomena in different...

... Upstream Oil & Gas support work structural geology particle classification specific notion Reservoir Characterization flysch formation sandstone lining construction diameter excavation tunnel marl stability flysch approx geotechnical property characteristic phyllosilicate...

... ABSTRACT The paper deals with mathematical modelling of interaction of hydraulic tunnel linings with the surrounding rock mass with different kinds of static loads and earthquake seismic effects, as well as design methods for linings regarded as elements of a single deformable "liningrock...

... by embankment dams (Figure 1). The upper reservoir dam is approximately 480 feet (145 m) high; the lower dam is approximately 150 feet (47 m) high. Water is conveyed through three, 28.5 foot (8.7 m) diameter, concrete lined power Conduits. Each has an upper and lower horizontal segment approximately 3100...

... of such influence in the stress state for determining the required steel lining length. Résumé: Pendant de nombreuses années, la décision d''utiliser des blindages en acier dans les tunnels à pression, se basait sur des critères empiriques qui évaluaient Ie niveau des contraintes à partir de la couverture...