... discontinuity reservoir geomechanics dam foundation Thickness mean value discontinuity mechanical behaviour Reservoir Characterization Upstream Oil & Gas strength strength parameter investigation clast excavation face structural geology orientation direct shear test specimen rock mass...

... ABSTRACT: The authors have attempted to monitor the dynamic response of the surrounding rock mass at the excavation face of Tarutoge tunnel at the prefectural border of Shizuoka and Yamanashi prefectures, Japan in relation to the connection route between New Tomei and Chuo Expressways...

... analysis is therefore the only possibility. The most common way to simulate such a 3D process in 2D is the stress reduction method (Panet & Guenot 1983). According to this approach the radial stress acting on the tunnel boundary is reduced in order to simulate the arrival of the excavation face...

... by measuring compressive stresses. We measured time-dependent secondary stresses using Gloetzl pressure cells which were installed in front and behind the excavation face to monitor stress changes with relation to the distance to the longwall face. Mea- suring points and methods of collecting data had...

... in Fig. 2. The Predor code enables different graphical pres- entations of the monitoring data from the tunnel as well as from the monitoring of surface (Table 1). If the scanned face logs of the excavation faces are inserted in a database, the Predor code enables 1 INTRODUCTION Geodetic 3D displacement...

.... main tunnel excavation portal instrument diameter excavation face extensometer main tube pilot tunnel excavation construction deformation rock mass tunnel main tunnel convergence Pinglin tunnel tunnel excavation twin tube roadway tunnel Eurock '96, Barta (ed 1996 Balkema, Rotterdam...

... including those of the ground ahead of the excavation face, and implementation of counter-measures ensuring continuous design optimization. Effective integration of these four aspects is the key to an efficient construction of large caverns in poor rock mass. RESUME: La caverne Borzoli, longue de...