... for the site formation works on a mountain ridge. The cut slopes were designed based on limited soil investigation data in the thick tropical rainforest. A small scale landslide took place immediately after the excavation started on one of the slopes. To find out the cause of the landslide, an additional soil...

... computation yuzo okui swelling volcanic rock excavation yamagata expressway mechanical behavior numerical simulation parameter The 5th International Workshop on Rock Mechanics and Engineering Geology in Volcanic Fields (RMEGV2021) ©2021 JSRM & JSEG, ISBN 978-4-907430-05-4 ISRM2021 Specialized...

... Volcanic Group on the northwest side. The maximum overburden is approximately 57 meters and the excavating ground is mainly composed of debris-avalanche deposits which means volcanic deposits produced by the orogenic movements and the eruptive activity from Yotei Volcano. This unconsolidated and sandy...

... Abstract In the excavation of rock tunnels, rocks behind the face have to be known in advance, especially in the case that rocks like serpentinite, which would cause squeezing while tunneling, might exist. A long advancing boring from the working face gives such information with cuttings...

... basalt, displayed strong core discing (Figure 3). The likely perform- ance of the planned disposal tunnels at the same depth, was therefore of some concern. A concep- tual image of excavation `scale effects' is shown in Figure 4, to illustrate the likely relative effects of massive columnar basalt...

.... classification Reservoir Characterization Island el verodal tunnel excavation El Hierro scoriae rock mass classification basaltic lava flow tunnel lava flow edifice volcanism Thickness shotcrete Welding pyroclast Volcanic Rock Mechanics Olalla et al. (eds) © 2010 Taylor & Francis Group...

...) and the Ontario Rockfall Hazard Rating System, RHRON (Franklin & Senior 1997) have been assessed, revealing a medium rock-fall hazard (RHRS =464) Moreover, the rock mass was classified according to its rippability (Hadjigeorgiou & Scoble 1990) yielding IE = 50 (very difficult case of excavation). 172 3...

... and the stabilization for an important excavated slope; in addition, 3 signifi- cant retaining walls had to be built to enable a road bed at the exit to the Portais Tunnel. The retaining structures required developing an important . set of different solutions, specifically gravity walls, reinforced earth retaining...

... Marqués AEPO, S.A. Ingenieros Consultores., Madrid, Spain Rodrigo Martinez Zarco INOCSA Ingenieria, S.L., Madrid, Spain ABSTRACT: This work presents a back-analysis of a tunnel section based on measured convergences values. The tunnel, located in La Palma Island, was excavated in basaltic pyroclastics...

... a great Space dedicated to tolerance. The sculpture is based on the concepts of space, scale and light and consists of excavating a large cavern of approximate dimensions 65 m long, by 45 m wide and 40 m high. Two light shafts connect the main space with the surface and are oriented to capture...

... length, and a tunnel 1250 m long with a storage capacity of 40,000 m 3 . The rock mass at the site is of volcanic origin with most of the excavation performed in a mass of volcanic breccia and basalts but with consolidated alluvia recent deposits located in the roof arch of the cavern. A description...

... of Kerman, Kerman, Iran ABSTRACT: Convergence-confinement is one of the most popular methods that is applied for analyzing the interaction of a circular opening in rock masses. It is assumed that circular tunnel excavated in a con- tinuous, homogeneous, isotropic, initially elastic rock mass subjected...

... with hydraulic demolition hammers. The compact basalts and compact breccias are generally in the limiar of ripability, making the use of explosives the most economical method to pro- ceed with the excavation. The geotechnical class ZG1 is mainly formed by compact basalt, by vacuolar compact basalt and by compact...

... to recovey the historical Fuente Santa spring, well known at Middle Age due to its miraculous medical effects. The spring was buried by San Antonio volcano eruption in 1677, with debris, cinders and lava flows. A gallery was recently excavated under extreme and difficult natural conditions, a total lack...

... were held by significant excavation and landfill retaining structures. A total of 40 retaining structures and slope con- solidation structures were built, in a total length of about 3200 m (Figs. I and 2), which is twice higher than the one defined for the tourist com- plex streets' network, being...

... tunnels along the referred expressway, as well as a number of safety aspects related to these tunnels. Reservoir Characterization volcanic complex characteristic cross-section layby rock bolt geotechnical zone zg2 application expressway double tunnel gallery shotcrete excavation...