... concentration and damage in the corner area. The damage degree of the lining structure is classified according to the tensile damage factors, namely, no damage, slight damage, moderate damage, and severe damage. Combining the large deformation of flexible joints can effectively improve the design of tunnel...

... ABSTRACT: In Japan, some mountain tunnels are damaged by earthquakes and relative large-scale deformations such as the collapse of permanent lining and the deformation of supports have occurred. Although the earthquake resistant countermeasures for tunnels has been examined recently, some...

... convergence being higher than the horizontal one. It is thus of interest to evaluate the effect of flexible support composed of compressible wedges and of the final concrete lining on the closure evolution. Also, extensometers measurements and the stresses on the temporary support are analyzed in different...

... the construction of an underground research laboratory (called the MHM URL) in Bure, starting with shaft sinking operations (to a depth of 500 m). One of the shaft lining and surrounding rock was instrumented. Its concrete lining is highly monitored to understand its long-term behavior and the evolution...

... ABSTRACT: The Reicholzheim tunnel on the single-track line 4920 from Lauda to Wertheim had to be rehabilitated, since the existing tunnel lining, made of mortar sandstone blocks, is in a structurally poor condition. To rehabilitate the tunnel, the existing masonry shell was reinforced...

... Federal Railways OeBB starts to apply long-term observation of a tunnel in selected sections in weak rocks or fault zones. The main goal is to identify unfavourable tendencies in the displacement characteristic as well as the development of stresses in the tunnel lining. Based on the respective...

... along the new Southern Line between Vienna and Villach, the Semmering Base Tunnel represents an important, sustainable investment for the future. From 2030 onwards, it will be simpler and more appealing to make the switch from cars to railway. In doing so, it will be a useful contribution to climate...

... lining can be rarely designed following the so-called resistance principle. The state of the art suggests approaching the lining design by allowing the development of the necessary convergences to adequately reduce the rock load (yielding principle). In this paper, a new steel element (HiDSte), yet...

... line that runs through Slovenian Dinaric Karst is the construction of two seven kilometers long tunnels T1 and T2. Due to scarcity of water resources in the area adequate measures for tunnel construction had to be developed to ensure the sustainability of water resources in the long term. The paper...

... tunnel tunnel lining epc contractor lining perpendicular 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Pandoh Highway Tunnels in Indian Himalaya - a rock mechanical challenge in design and construction Andreas Goricki 3G Gruppe Geotechnik Graz ZT GmbH...

... located at 2 different elevations; ii) medium-low strength rock mass composed mainly of schists as described in the following; iii) high overburden. rock type reservoir characterization brenner base tunnel structural geology reservoir geomechanics excavation instability lining tunnel italy...

... ABSTRACT: Large infrastructure projects such as the railway base tunnels crossing the Alpine ridge are designed for a minimum service life of 100 years. The running tracks are adjustable to a few centimeters only and may be replaced after 50 years, but the tunnel lining must stay intact over...

... of the power plant. austria government gneiss excavation geology metamorphic rock lining upstream oil & gas europe government installation geologist rock type cavern tunnel elephant variant hoist drainage tunnel formwork biotite-plagioclase gneiss formwork carriage transformer...

... with such support structures, there is significant interest from industry in optimization (Langford, Vlachopoulos, & Diederichs, 2016). However, this proves to be a challenging task, as there are no clearly defined rules of acceptability for support and lining design (Hoek, 2001). Modern structural codes...

... ABSTRACT: This article deals with the numerical analysis of long-term behaviour of deep underground tunnel structures in claystone with "ductile lining" using PLAXIS 2D. The constructed gallery is a 2.6 m radius circular made of yielding sprayed concrete lining and is constructed at a depth...

... ABSTRACT: Structural monitoring in combination with reliable data interpretation is essential to understand the deformation behavior of the lining and finally, to guarantee safe construction and operation. Conventional techniques may involve limitations, either in the spatial or the temporal...

... and evaluate the impact of the excavation phases on the nearby existing structures, 2D and 3D finite element and finite difference models were realized, allowing to design both the rock-supports and the concrete inner lining for all the structures. The observational method was applied during the construction...

... ABSTRACT: This study has been attempted to do segment lining modeling by researching the effects on joints between segments. There were limitations in modeling analysis considering complex ground conditions along with joins. For example, it is often used to analyze the lining behavior due...

... ABSTRACT: At sequenced tunnel drives, next to the rock mass conditions, the advance rates of the single excavation stages and the moment of ring closure determine the performance of shotcrete linings. Especially in heterogeneous rock masses, the investigation of the optimum ring closure moment...

... ABSTRACT: A 1.6 km long headrace tunnel has been constructed for the Tauernmoos hydro power plant. For the dimensioning of the tunnel lining, a minimum elastic modulus requirement of 15 GPa for the surrounding rock mass was formulated. The objective for the geological documentation...