Abstract
On October 5th, 2010, cracks were found in a gallery 1.8 m high and 1.4 m wide. The gallery is 100 years old, runs parallel to a valley flank and was excavated in a tectonically strongly stressed, weathered and slightly dipping sandwich of clayey shales, sandstones and marls. The cracks in the roof as well as in the invert ran parallel to the axis of the gallery. Monitoring showed that crack widths were increasing 1.5 mm per year, sidewall distances were increasing 3.5 mm per year, whereas the height of the gallery was decreasing 2.5 mm per year. After eliminating several possible causes of cracking, a landslide producing the damages had to be taken into consideration. Monitoring of the valley flank surface as well as inclinometer readings revealed that a landslide was occurring, loading the gallery lining. Most probably the landslide had been reactivated by excessive rainfall in 2009 as well as by works for the renewal of a weir in the valley bottom. As stabilization of the slope was not an option for several reasons, it was decided to replace the gallery by a new one deeper inside the slope, which will be ready for operation in 2017. Thus the old gallery has to be kept in operation till then and it was decided to reinforce the old gallery by a heavily reinforced shotcrete lining 10 cm thick. As slope displacements went on, cracks in the shotcrete lining developed with a completely different pattern: in the section where the gallery lies completely in the landslide shear zone no cracks formed until now due to heavy reinforcement, whereas in the transition sections stable ground–landslide and landslide–stable ground diagonal tension cracks in the roof due to shear by the landslide developed. Numerical models showed that cracking and spalling of the shotcrete lining would occur only after some centimetres of additional displacements of the slope, which hopefully will not occur before 2017.
Similar content being viewed by others
References
Barla G, Antolini F, Barla M, Mensi E, Piovano G (2010) Monitoring of the Beauregard landslide (Aosta Valley, Italy) using advanced and conventional techniques. Eng Geol 116:218–235
Baron I, Agliardi F, Ambrosi C, Crosta GB (2005) Numerical analysis of deep-seated mass movements in the Magura Nappe; Flysch Belt of the Western Carpathians (Czech Republic). Nat Hazards Earth Syst Sci 5:367–374
Cocchetti G, di Prisco C, Galli A, Nova R (2009a) Soil-pipeline interaction along unstable slopes: a coupled three-dimensional approach. Part 1: theoretical formulation. Can Geotech J 46:1289–1304
Cocchetti G, di Prisco C, Galli A (2009b) Soil-pipeline interaction along unstable slopes: a coupled three-dimensional approach. Part 2: numerical analyses. Can Geotech J 46:1305–1321
Cornforth DH (2012) Advances in investigation and analysis for soil landslides: three selected topics. In: Proc. 11th Int. Symposium on Landslides and Eng. Slopes, Banff 2012 pp 59–71
Crosta GB, di Prisco C, Frattini P, Frigerio G, Castellanza R, Agliardi F (2014) Chasing a complete understanding of the triggering mechanisms of a large rapidly evolving rockslide. Landslides 11:747–764
Dawson EM, Roth WH, Drescher A (1999) Slope stability analysis by strength reduction. Geotechnique 49(6):835–840
Deere DU, Miller RP (1966) Engineering classification and index properties for intact rock. Technical report No. AFWL-TR-65-116. University of Illinois. Urbana, Illinois
Donald IB, Giam SK (1988) Application of the Nodal Displacement Method to Slope Stability Analysis. In: Australia-New Zealand Conference on Geomechanics (1988: Sydney, N.S.W.). Fifth Australia-New Zealand Conference on Geomechanics: Prediction Versus Performance; Preprints of Papers. Barton, ACT: Institution of Engineers, Australia, 1988 pp 456–460
Eurocode 7 (2010) Geotechnical design. Part 1: General rules
Eurocode 2 (2011) Design of concrete structures. Part 1: General rules and rules for buildings
Fellenius W (1927) Erdstatische Berechnungen mit Reibung und Kohasion Adhasion und unter Annahme Kreiszylindrischer Gleitflachen. Ernst W, Berlin
Itasca (2011) FLAC—Fast Lagrangian Analysis of Continua, Version 7.0. Itasca Consulting Group, Inc. Minneapolis, Minnesota
Jiao Y-Y, Wang Z-H, Wang X-Z, Adoko AC, Yang Z-X (2013) Stability assessment of an ancient landslide crossed by two coal mine tunnels. Eng Geol 159:36–44
Koettl R (2014) Results of inclinometer measurements. Unpublished report
Marinos P, Hoek E (2000) GSI: a geologically friendly tool for rock mass strength estimation. Proc. GeoEng2000 Conference, Melbourne pp 1422–1442
Meng W, Bogaard TA, van Beek LPH (2012) The long-term hydrological effect of forest stands on the stability of slopes. In: Proc. 11th Int. Symposium on Landslides and Eng. Slopes, Banff, 2012 pp 1631–1636
Mueller L (1978) Rock Engineering, vol 3. Tunnelling (in German), Enke, Stuttgart
Peck RB (1969) Advantages and limitations of the observational method in applied soil mechanics. Géotechnique 19(2):171–187
Poisel R, Oehreneder H (1991) Cracks in concrete linings of tunnels and the assessment of tunnel stability. Felsbau 9:117–125
Poisel R, Zettler A, Unterberger W (1996) Tunnelling in landslides. In: Proc. Eurock ´96. Turin, 1996 pp 667–674
Rat M (1992) Conclusions. Bull Int Assoc Eng Geol 45:75–76
Rudorfer C (2014) Results of geodetic survey. Unpublished report
Simeoni L, Ronchetti F, Corsini A, Mongiovi L, Ferro E, Ghirardini G, Girardi MF (2014) Frane a cinematica estremamente lenta in una valle glaciale del corridoio TEN-T5. In: Proc. of XXV Geotechnical National Congress. Baveno (Italy) June 4–6, 2014
Wang T-T (2010) Characterizing crack patterns on tunnel linings associated with shear deformation induced by instability of neighboring slopes. Eng Geol 115(1–2):80–95
Weber F (2013) Untersuchung zur Abhängigkeit des Verschiebungsverhaltens großer Massenbewegungen von der Jahreszeit und der Höhenlage. Master Thesis. Vienna University of Technology
Weidner S, Moser M, Lang E (2011) Geotechnische und kinematische Analyse des Talzuschubes Gradenbach (Kärnten/Österreich). Jahrbuch der Geologischen Bundesanstalt 151 (1+2):17–60
Wellenzohn P (2013) Numerische Untersuchung eines mittels Spritzbetonschale verstärkten Stollenbauwerks in einer Massenbewegung. Master thesis. Vienna University of Technology
Zettler AH, Poisel R, Roth W, Preh A (1999) Slope stability analysis based on the shear reduction technique in 3D slope stability analysis based on the shear reduction technique in 3D. In: Detournay C, Hart R (ed) Proceedings of the International FLAC Symposium on Numerical Modeling in Geomechanics. Minneapolis (USA) September 1–3, 1999 pp 11–16
Zienkiewicz OC, Humpheson C, Lewis RW (1975) Associated and non-associated visco plasticity and plasticity in soil mechanics. Geotechnique 25(4):671–689
Zischinsky U (1984) Bruchformen und Standfestigkeit von Stollen im geschichteten Gebirge. Felsbau 2:125–136
Acknowledgments
Suggestions as well as recommendations of an unnamed reviewer are gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Poisel, R., Mair am Tinkhof, K. & Preh, A. Landslide Caused Damages in a Gallery. Rock Mech Rock Eng 49, 2301–2315 (2016). https://doi.org/10.1007/s00603-015-0765-3
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00603-015-0765-3