TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
T1  - Construction and rehabilitation of landfill shafts
JF  - Sardinia 93 : Fourth International Landfill Symposium "Barrier systems, environmental aspects, upgrading and remediation, siting, monofills, effects of waste pretreatment, landfilling in developing countries" ; 11 - 15 October 1993, S. Margherita di Pula (Cagliari), Sardinia, Italy ; proceedings / coord. by Thomas H. Christensen ... - Bd. 1
Y1  - 1993
N1  - International Landfill Symposium <4, 1993, Santa Margherita, Pula>
SP  - 451
EP  - 460
PB  - CISA, Environmental Sanitary Engineering Centre
CY  - Cagliari
ER  - 
TY  - JOUR
A1  - Gossla, Ulrich
A1  - Sato, R.
T1  - Present production circumstances of aggregate in Germany / Sato, R.; Gossla, U.
JF  - Cement & Concrete (1998)
Y1  - 1998
N1  - auf Japanisch
SP  - 146
EP  - 153
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Boyken, P.
A1  - Sasse, T.
A1  - Arnold, J.
T1  - Geotechnical aspects of the construction of the integrated harbour sludge management system in Bremen-Seehausen / P. Boyken ;  E. Biener ; T. Sasse ; J. Arnold
JF  - Geotechnical engineering for transportation infrastructure : proceedings of the twelfth European Conference on Soil Mechanics and Geotechnical Engineering, Amsterdam, Netherlands, 7 - 10 June 1999 ; theory and practice, planning and design, construction and maintenance. - Vol. 2
Y1  - 1999
SN  - 90-5809-049-3
N1  - European Conference on Soil Mechanics and Geotechnical Engineering <12, 1999, Amsterdam>
SP  - 909
EP  - 914
PB  - Balkema
CY  - Rotterdam
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
A1  - Arnold, J.
A1  - Woltering, S.
T1  - New treatment of harbour sludge in Bremen and Bremerhaven  /  E. Biener ; T. Sasse ; J. Arnold ; S. Woltering ; N. Binder
JF  - Characterisation and treatment of sediments : Antwerpen, Belgium, September 15 - 17, 1999 ; [preceded by 12th International Harbour Congress] ; proceedings / CATS 4. Ed.: G. De Schutter. Organized by: Technologisch Instituut, Koninklijke Vlaamse Ingenieursvereniging
Y1  - 1999
SN  - 9076019118
N1  - CATS <4, 1999, Anvers>
SP  - 115
EP  - 122
PB  - Technolog. Inst.
CY  - Anvers
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
T1  - Construction of composite lining systems under unfavourable weather conditions
JF  - Landfilling of waste: barriers / ed. by T. H. Christensen; R. Cossu; R. Stegmann. - 1. Aufl.
Y1  - 1994
SN  - 0419159908
SP  - 183
EP  - 200
PB  - Spon
CY  - London [u.a.]
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Rouvé, G.
T1  - Behaviour and maintenance of some old masonry gravity dams
JF  - Safety of dams : proceedings of the International Conference on Safety of Dams, Coimbra, 23-28 April 1984 / ed. by J. Laginha Serafim. - [Hauptbd.]
Y1  - 1984
SN  - 90-6191-522-8
N1  - International Conference on Safety of Dams <1984, Coimbra> ; ISBN Set: 90-6191-521-X
SP  - 101
EP  - 106
PB  - Rotterdam [u.a.]
CY  - Balkema
ER  - 
TY  - JOUR
A1  - Jochim, Haldor E.
T1  - Charging rail operators for delays – how not to do it
JF  - Networks for mobility : International Symposium, September 18 - 20, 2002, Stuttgart, Germany ; proceedings / University of Stuttgart, Centre of Transporation Research (FOVUS). W. Möhlenbrink ... (eds.)
Y1  - 2002
SN  - 3893010858
N1  - International Symposium ; (2002.09.18-20 : ; Stuttgart)
PB  - FOVUS
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Jochim, Haldor E.
T1  - A traffic resistance model of long-distance travel
JF  - Networks for mobility : 2nd international symposium, September 29 - October 1, 2004, Stuttgart, Germany ; proceedings ; abstracts and CD-ROM / [2nd International Symposium on Networks for Mobility]. FOVUS, Centre of Transportation Research, University of
Y1  - 2004
SN  - 3-89301-180-3
N1  - International Symposium on Networks for Mobility (2, 2004, Stuttgart)
PB  - FOVUS
CY  - Stuttgart
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
T1  - Quality improvements in the construction of multilayer covers
JF  - Géologie et confinement des déchets toxiques : actes du symposium international, 8 - 11 juin 1993 / GEOCONFINE 93, Montpellier, France. Réd. Marcel Arnould
Y1  - 1993
SN  - 90-5410-330-2
N1  - Geoconfine <1993, Montpellier> ; Paralellt.: Geology and confinement of toxic wastes
SP  - 309
EP  - 312
PB  - Balkema
CY  - Rotterdam [u.a.]
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
A1  - Bökers, H.
T1  - Preliminary or final capping of sanitary landfills? : Technical and economical aspects
JF  - Sardinia 99 : proceedings / Seventh International Waste Management and Landfill Symposium, [4 - 8 October 1999, S. Margherita di Pula, Cagliari, Sardinia, Italy]. Ed.: Thomas H. Christensen. -  Bd. 3 : Barriers, waste mechanics and landfill design
Y1  - 1999
N1  - International Waste Management and Landfill Symposium <7, 1999, Cagliari>
SP  - 287
EP  - 294
PB  - CISA, Environmental Sanitary Engineering Centre
CY  - Cagliari
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Boyken, P.
A1  - Sasse, T.
T1  - Integrated dredged material management system of Bremen-Seehausen
JF  - Sardinia 97 : proceedings ; [13 - 17 October 1997, S. Margherita di Pula - Cagliari, Sardinia, Italy] / Sixth International Landfill Symposium. Ed.: Thomas H. Christensen... - Bd. 5 : Landfill regulations, waste characteristics, landfilling in middle and lower income countries, industrial wastes and monolandfills
Y1  - 1997
N1  - International Landfill Symposium <6, 1997, Santa Margherita, Pula>
SP  - 497
EP  - 502
PB  - CISA, Environmental Sanitary Engineering Centre
CY  - Cagliari
ER  - 
TY  - JOUR
A1  - Biener, Ernst
T1  - Rehabilitation of old gravity dams
JF  - [Transactions] : proceedings of fifteenth international congress on large dams ; 24 - 28 Juin 1985, Lausanne, Suisse = Quinzieme Congres International des Grands Barrages. - Bd. 4
Y1  - 1985
N1  - International Congress on Large Dams <15, 1985, Paris>
SP  - Q 59, R.2, S. 21
EP  - 23
PB  - Intern. Commission on Large Dams
CY  - Paris
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Wemhoff, T.
A1  - Bethke, H.
T1  - Stability and settlement problems based on the example of the Blockland landfill in Bremen
JF  - Sardinia 95 : Fifth International Landfill Symposium ; (2 - 6 October 1995, S. Margheritadi Pula - Cagliari, Sardinia, Italy) ; proceedings / coord.: Thomas H. Christensen ... - Bd. 2 : Siting, lining, drainage & landfill mechanics
Y1  - 1995
N1  - International Landfill Symposium <5, 1995, Santa Margherita, Pula>
SP  - 843
EP  - 853
PB  - CISA, Environmental Sanitary Engineering Centre
CY  - Cagliari
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
A1  - Konertz, K.
T1  - Preparation of mineral sealing materials for landfills by different processing technologies / Sasse, T. ; Biener, E. ; Konertz, K.
JF  - Sardinia 93 : Fourth International Landfill Symposium "Barrier systems, environmental aspects, upgrading and remediation, siting, monofills, effects of waste pretreatment, landfilling in developing countries" ; 11 - 15 October 1993, S. Margherita di Pula (Cagliari), Sardinia, Italy ; proceedings / coord. by Thomas H. Christensen ... - Bd. 1
Y1  - 1993
N1  - International Landfill Symposium <4, 1993, Santa Margherita, Pula>
SP  - 275
EP  - 283
PB  - CISA, Environmental Sanitary Engineering Centre
CY  - Cagliari
ER  - 
TY  - JOUR
A1  - Biener, Ernst
A1  - Sasse, T.
T1  - Experience with new techniques in slurry cutoff wall construction
JF  - ISWA 88, proceedings of the 5th International Solid Wastes Conference : September 11 - 16th, 1988, Copenhagen, Denmark / ed. by Lizzi Andersen ... - Vol. 1 : Oral presentations
Y1  - 1988
SN  - 0-12-058451-4
N1  - International Solid Wastes Conference <5, 1988, København> ; International Solid Wastes and Public Cleansing Association
SP  - 41
EP  - 46
PB  - Acad. Press
CY  - London [u.a.]
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
T1  - Edge Joints with Dowel Type Fasteners in Cross Laminated Timber
T2  - Proceedings. CIB-W18 Meeting 2007, Bled, Slovenia 2007
Y1  - 2007
SN  - 0945-6996
N1  - Paper 40-7-2
SP  - 1
EP  - 11
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans Joachim
T1  - Load Carrying Capacity of Joints with Dowel Type Fasteners in Solid Wood Panels
T2  - Proceedings. CIB-W18 Meeting 2006, Florence, Italy 2006
Y1  - 2006
SN  - 0945-6996
N1  - Paper 39-7-5
SP  - 1
EP  - 10
ER  - 
TY  - JOUR
A1  - Kirstein, Simon
A1  - Müller, Karsten
A1  - Walecki-Mingers, Mark
A1  - Deserno, Thomas M.
T1  - Robust adaptive flow line detection in sewer pipes
JF  - Automation in construction
N2  - As part of a novel approach to automatic sewer inspection, this paper presents a robust algorithm for automatic flow line detection. A large image repository is obtained from about 50,000 m sewers to represent the high variability of real world sewer systems. Automatic image processing combines Canny edge detection, Hough transform for straight lines and cost minimization using Dijkstra's shortest path algorithm. Assuming that flow lines are mostly smoothly connected horizontal structures, piecewise flow line delineation is reduced to a process of selecting adjacent line candidates. Costs are derived from the gap between adjacent candidates and their reliability. A single parameter α enables simple control of the algorithm. The detected flow line may precisely follow the segmented edges (α = 0.0) or minimize gaps at joints (α = 1.0). Both, manual and ground truth-based analysis indicate that α = 0.8 is optimal and independent of the sewer's material. The algorithm forms an essential step to further automation of sewer inspection.
Y1  - 2012
U6  - https://doi.org/10.1016/j.autcon.2011.05.009
SN  - 1872-7891 (E-Journal) ; 0926-5805 (Print)
IS  - 21
SP  - 24
EP  - 31
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Ganegedara, H.
A1  - Alahakoon, D.
A1  - Mashford, J.
A1  - Paplinski, A.
A1  - Müller, Karsten
A1  - Deserno, T. M.
T1  - Self organising map based region of interest labelling for automated defect identification in large sewer pipe image collections
T2  - The 2012 International Joint Conference on Neural Networks (IJCNN) : 10 - 15 June 2012, Brisbane, Australia ; [part of the] 2012 IEEE World Congress on Computational Intelligence (IEEE-WCCI 2012)
Y1  - 2012
SN  - 978-1-4673-1490-9
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Siekmann, Thomas
A1  - Müller, Karsten
T1  - Adaptive potential of the stormwater management in urban areas faced by the climate change
T2  - 12th International Conference on Urban Drainage, Porto Alegre/Brazil, 11-16 September 2011
Y1  - 2011
ER  - 
TY  - CHAP
A1  - Müller, Karsten
A1  - Hüben, Susanne
T1  - From rehabilitation strategy up to formation of lots : implementation of a computer-aided decision support system
T2  - 11th International Conference on Urban Drainage, Edinburgh, Scotland, UK, 31st August to 5th September 2008
Y1  - 2008
ER  - 
TY  - CHAP
A1  - Müller, Karsten
A1  - Fischer, B.
T1  - Objective condition assessment of sewer systems
T2  - Strategic asset management of water supply and wastewater infrastructures : invited papers from the 2nd IWA Leading Edge Conference on Strategic Asset Management (LESAM), Lisbon, October [17 - 19] 2007 / ed. by Helene Alegre and Maria do Céu Almeida
Y1  - 2009
SN  - 9781843391869
SP  - 521
EP  - 534
PB  - IWA Publ.
CY  - London
ER  - 
TY  - CHAP
A1  - Stepkes, Hermann
A1  - Zimmermann, J.
A1  - Müller, Karsten
A1  - Siekmann, Marko
A1  - Pinnekamp, Josef
T1  - Economical rehabilitation of sewer systems by ground penetration radar investigations
T2  - Strategic asset management of water supply and wastewater infrastructures : invited papers from the 2nd IWA Leading Edge Conference on Strategic Asset Management (LESAM), Lisbon, October [17 - 19] 2007 / ed. by Helene Alegre and Maria do Céu Almeida
Y1  - 2007
SN  - 9781843391869
SP  - 501
EP  - 520
PB  - IWA Publ.
CY  - London
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Kendrick, C.
A1  - Lawson, R. M.
T1  - Thermal capacity of composite floor slabs
JF  - Energy and buildings
Y1  - 2013
SN  - 1872-6178 (E-Journal); 0378-7788 (Print)
VL  - Vol. 67
SP  - 531
EP  - 539
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Feldmann, Markus
A1  - Pyschny, D.
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
T1  - Life cycle assessment of steel constructions
T2  - Life-cycle and sustainability of civil infrastructure systems : proceedings of the Third International Symposium on Life-Cycle Civil Engineering (IALCCE'12) : Vienna, Austria, October 3-6, 2012
Y1  - 2012
SN  - 978-0-203-10336-4
SP  - 321
PB  - Taylor and Francis
CY  - Hoboken
ER  - 
TY  - CHAP
A1  - Kuhnhenne, Markus
A1  - Döring, Bernd
A1  - Pyschny, Dominik
A1  - Feldmann, Markus
T1  - Energy efficient sandwich construction
T2  - Proceedings of the VI International Congress on Architectural Envelopes : 20.6. - 22.6.2012, San Sebastian, Spain
Y1  - 2012
SP  - 277
EP  - 285
PB  - ICAE
ER  - 
TY  - CHAP
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
A1  - Feldmann, Markus
T1  - Floor systems - key elements for sustainable multi-storey buildings
T2  - SB11 Helsinki World Sustainable Building Conference : 18. - 21.10.2011
Y1  - 2011
SP  - 1
EP  - 6
ER  - 
TY  - RPRT
A1  - Kesti, J.
A1  - Burstrand Knutsson, H.
A1  - Salvatore, W.
A1  - Saouridis, C.
A1  - Odrieres Meré, J.
A1  - Georgi, H.
A1  - Casajus, A.
A1  - Butz, C.
A1  - Schneider, R.
A1  - Döring, Bernd
T1  - Dissemination of knowledge in the use of steel-intensive dry construction systems in housing : final report. Contract No RFS2-CT-2004-00036. EUR 22849 EN
Y1  - 2008
SN  - 978-92-79-05973-5
PB  - Office for Official Publications of the European Communities
CY  - Luxembourg
ER  - 
TY  - CHAP
A1  - Döring, Bernd
A1  - Feldmann, Markus
A1  - Kuhnhenne, Markus
A1  - Hellberg, Jan
T1  - Implementing a thermal activation system into a light-weight steel deck element
T2  - Eurosteel 2008 : 5th European Conference on Steel and Composite Structures ; research, practice, new materials ; 3rd to 5th September 2008, Graz, Austria / ed. by Robert Ofner ...
Y1  - 2008
SN  - 92-0147-000-90
SP  - 941
EP  - 946
PB  - ECCS, European Convention for Construction Steelwork
CY  - Brussels
ER  - 
TY  - CHAP
A1  - Spasov, Yulian
A1  - Döring, Bernd
A1  - Griffin, Allan
T1  - Exploiting the thermal mass in an energy efficient building - a comparison exercise between IES Apache and TRNSYS models
T2  - Clima 2007 WellBeing Indoors: 9th Rehva World Congress, 10-14 June 2007, Helsinki, Finland : proceedings
Y1  - 2007
SN  - 978-952-99898-2-9
SP  - 1
EP  - 7
CY  - Helsinki
ER  - 
TY  - CHAP
A1  - Döring, Bernd
A1  - Feldmann, Markus
A1  - Kuhnhenne, Markus
T1  - An innovative thermally activated light-weight steel deck system - numerical investigations and practical tests
T2  - Clima 2007 WellBeing Indoors: 9th Rehva World Congress, 10-14 June 2007, Helsinki, Finland : proceedings
Y1  - 2007
SN  - 978-952-99898-2-9
SP  - 1
EP  - 8
CY  - Helsinki
ER  - 
TY  - RPRT
A1  - Conan, Yulian
A1  - D'Haeyer, R.
A1  - Béguin, P.
A1  - Döring, Bernd
A1  - Kuhnhenne, Markus
A1  - Bayo, E.
T1  - Steel in low-rise building : a symbiosis of cold formed sections and light rolled profiles : final report. Contract-No. 7215-PP/070. EUR 22080 en
Y1  - 2006
SN  - 92-79-02082-X
PB  - Office for Official Publications of the European Communities
CY  - Luxembourg
ER  - 
TY  - CHAP
A1  - Döring, Bernd
A1  - Sedlacek, Gerhard
T1  - Improvement of thermal comfort in light weight buildings made of steel with new concepts for slab systems
T2  - 10th Nordic Steel Construction Conference, Copenhagen, Denmark 7-9. June 2004: NSCC 2004 : proceedings
Y1  - 2004
SP  - 35
EP  - 44
PB  - Danish Steel Inst.
CY  - Copenhagen
ER  - 
TY  - CHAP
A1  - Döring, Bernd
A1  - Ziller, Claudia
A1  - Hortmanns, M.
T1  - Ventilation of double facades by external dynamic wind pressure
T2  - 11th International Conference on Wind Engineering. 1
Y1  - 2003
SP  - 721
EP  - 730
PB  - The Wind Science and Engineering Research Center
CY  - Lubbock, Tex.
ER  - 
TY  - CHAP
A1  - Ziller, Claudia
A1  - Döring, Bernd
ED  - Carmeliet, J.
ED  - Hens, H.
ED  - Vermeir, G.
T1  - Influence of the external dynamic wind pressure on the ventilation of double facades
T2  - Research in building physics: proceedings of the Second International Conference on Building Physics : Leuven, Belgium, 14-18 September 2003
Y1  - 2003
SN  - 9058095657, 9789058095657
SP  - 527
EP  - 533
PB  - Taylor and Francis
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Döring, Bernd
A1  - Reger, Vitali
A1  - Kuhnhenne, Markus
A1  - Feldmann, Markus
A1  - Kesti, Jyrki
A1  - Lawson, Mark
A1  - Botti, Andrea
T1  - Steel solutions for enabling zero-energy buildings
JF  - Steel Construction - Design
and Research
Y1  - 2015
U6  - https://doi.org/10.1002/stco.201510029
SN  - 1867-0539
N1  - The 13th Nordic Steel Construction Conference, Tampere, 2015 (NSCC-2015)
VL  - 8
IS  - 3
SP  - 194
EP  - 200
PB  - Ernst & Sohn
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Kirsch, Ansgar
T1  - Numerical investigation of the face stability of shallow tunnels in sand
T2  - Numerical methods in geotechnical engineering : (NUMGE 2010) : proceedings of the seventh European Conference on Numerical Methods in Geotechnical Engineering, Trondheim, Norway, 2 - 4 June 2010 / ed. by Thomas Benz ...
Y1  - 2010
SN  - 978-0-415-59239-0
SP  - 779
EP  - 784
PB  - Taylor and Francis
CY  - London
ER  - 
TY  - CHAP
A1  - Kirsch, Ansgar
A1  - Marcher, Thomas
T1  - Numerical prediction of time-dependent rock swelling based on an example of a major tunnel project in Ontario/Canada
T2  - Numerical methods in geotechnical engineering : (NUMGE 2010) : proceedings of the seventh European Conference on Numerical Methods in Geotechnical Engineering, Trondheim, Norway, 2 - 4 June 2010 / ed. by Thomas Benz ...
Y1  - 2010
SN  - 978-0-415-59239-0
SP  - 297
EP  - 302
PB  - Taylor and Francis
CY  - London
ER  - 
TY  - CHAP
A1  - Fellin, Wolfgang
A1  - King, Julian
A1  - Kirsch, Ansgar
A1  - Oberguggenberger, Michael
T1  - Uncertainty modelling and sensitivity analysis of tunnel face stability
T2  - Safety, reliability and risk of structures, infrastructures and engineering systems : proceedings of the tenth International Conference on Structural Safety and Reliability (ICOSSAR 2009), Osaka, Japan, 13-17 September 2009 / ed.: Hitoshi Furuta ...
Y1  - 2009
SN  - 978-0-415-47557-0
SP  - 112
EP  - 114
PB  - CRC Pr.
CY  - Boca Raton, Fla. [u.a.]
ER  - 
TY  - CHAP
A1  - Kirsch, Ansgar
T1  - Experimental and numerical investigation of the face stability of shallow tunnels in sand
T2  - Safe tunnelling for the city and environment : proceedings of the World Tunnel Congress 2009, Budapest, Hungary, 23 to 28 September 2009 / organised by International Tunnelling and Underground Space Association ...
Y1  - 2009
SP  - 1
EP  - 8
PB  - Hungarian Tunnelling Association
CY  - Budapest
ER  - 
TY  - CHAP
A1  - Uibel, Thomas
A1  - Blaß, Hans-Joachim
T1  - Joints with Dowel Type Fasteners in CLT structures
T2  - Focus solid timber solutions : European Conference on Cross Laminated Timber (CLT); May 21-22, 2013, Graz University of Technology, Austria
Y1  - 2013
SN  - 978-1-85790-181-8 ; 1-85790-181-9
SP  - 119
EP  - 134
ER  - 
TY  - JOUR
A1  - Fellin, Wolfgang
A1  - King, Julian
A1  - Kirsch, Ansgar
A1  - Oberguggenberger, Michael
T1  - Uncertainty modelling and sensitivity analysis of tunnel face stability
JF  - Structural safety
N2  - This paper proposes an approach to the choice and evaluation of engineering models with the aid of a typical application in geotechnics. An important issue in the construction of shallow tunnels, especially in weak ground conditions, is the tunnel face stability. Various theoretical and numerical models for predicting the necessary support pressure have been put forth in the literature. In this paper, we combine laboratory experiments performed at the University of Innsbruck with current methods of uncertainty and sensitivity analysis for assessing adequacy, predictive power and robustness of the models. The major issues are the handling of the twofold uncertainty of test results and of model predictions as well as the decision about what are the influential input parameters.
Y1  - 2010
U6  - https://doi.org/10.1016/j.strusafe.2010.06.001
SN  - 0167-4730
VL  - 32
IS  - 6
SP  - 402
EP  - 410
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
T1  - Experimental investigation of the face stability of shallow tunnels in sand
JF  - Acta Geotechnica
N2  - Various models have been proposed for the prediction of the necessary support pressure at the face of a shallow tunnel. To assess their quality, the collapse of a tunnel face was modelled with small-scale model tests at single gravity. The development of the failure mechanism and the support force at the face in dry sand were investigated. The observed displacement patterns show a negligible influence of overburden on the extent and evolution of the failure zone. The latter is significantly influenced, though, by the initial density of the sand: in dense sand a chimney-wedge-type collapse mechanism developed, which propagated towards the soil surface. Initially, loose sand did not show any discrete collapse mechanism. The necessary support force was neither influenced by the overburden nor the initial density. A comparison with quantitative predictions by several theoretical models showed that the measured necessary support pressure is overestimated by most of the models. Those by Vermeer/Ruse and Léca/Dormieux showed the best agreement to the measurements.
Y1  - 2010
U6  - https://doi.org/10.1007/s11440-010-0110-7
SN  - 1861-1125
VL  - 5
IS  - 1
SP  - 43
EP  - 62
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Kirsch, Ansgar
A1  - Felber, W.
A1  - Marcher, Thomas
A1  - Fuchs, W.
T1  - Geotechnical challenges during design and construction of a ski resort in Azerbaijan
T2  - Geotechnics of roads and railways : proceedings of the 15th Danube - European Conference on Geotechnical Engineering : 9-11 September 2014, Vienna, Austria
Y1  - 2014
SN  - 978‐3‐902593‐01‐6
SP  - 757
EP  - 762
PB  - ÖIAV - Österreichischer Ingenieur- und Architekten-Verein
CY  - Wien
ER  - 
TY  - JOUR
A1  - Kolymbas, Dimitrios
A1  - Fellin, W.
A1  - Kirsch, Ansgar
T1  - Squeezing due to stress relaxation in foliated rock
JF  - International journal for numerical and analytical methods in geomechanics
Y1  - 2006
U6  - https://doi.org/10.1002/nag.530
SN  - 1096-9853 (E-Journal); 0363-9061 (Print)
VL  - Vol. 30
IS  - Iss. 13
SP  - 1357
EP  - 1367
ER  - 
TY  - JOUR
A1  - Bayon, Arnau
A1  - Valero, Daniel
A1  - Garcia-Bartual, Rafael
A1  - Vallés-Morán, Francisco José
A1  - López-Jiménez, P. Amparo
T1  - Performance assessment of OpenFOAM and FLOW-3D in the numerical modeling of a low Reynolds number hydraulic jump
JF  - Environmental Modelling & Software
N2  - A comparative performance analysis of the CFD platforms OpenFOAM and FLOW-3D is presented, focusing on a 3D swirling turbulent flow: a steady hydraulic jump at low Reynolds number. Turbulence is treated using RANS approach RNG k-ε. A Volume Of Fluid (VOF) method is used to track the air–water interface, consequently aeration is modeled using an Eulerian–Eulerian approach. Structured meshes of cubic elements are used to discretize the channel geometry. The numerical model accuracy is assessed comparing representative hydraulic jump variables (sequent depth ratio, roller length, mean velocity profiles, velocity decay or free surface profile) to experimental data. The model results are also compared to previous studies to broaden the result validation. Both codes reproduced the phenomenon under study concurring with experimental data, although special care must be taken when swirling flows occur. Both models can be used to reproduce the hydraulic performance of energy dissipation structures at low Reynolds numbers.
Y1  - 2016
SN  - 1364-8152
U6  - https://doi.org/10.1016/j.envsoft.2016.02.018
VL  - 80
SP  - 322
EP  - 335
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - THES
A1  - Bung, Daniel Bernhard
T1  - Imaging techniques for investigation of free-surface flows in hydraulic laboratories
N2  - This thesis aims at the presentation and discussion of well-accepted and new
imaging techniques applied to different types of flow in common hydraulic
engineering environments. All studies are conducted in laboratory conditions and
focus on flow depth and velocity measurements. Investigated flows cover a wide
range of complexity, e.g. propagation of waves, dam-break flows, slightly and fully
aerated spillway flows as well as highly turbulent hydraulic jumps.
Newimagingmethods are compared to different types of sensorswhich are frequently
employed in contemporary laboratory studies. This classical instrumentation as well
as the general concept of hydraulic modeling is introduced to give an overview on
experimental methods.
Flow depths are commonly measured by means of ultrasonic sensors, also known as
acoustic displacement sensors. These sensors may provide accurate data with high
sample rates in case of simple flow conditions, e.g. low-turbulent clear water flows.
However, with increasing turbulence, higher uncertainty must be considered.
Moreover, ultrasonic sensors can provide point data only, while the relatively large
acoustic beam footprint may lead to another source of uncertainty in case of
relatively short, highly turbulent surface fluctuations (ripples) or free-surface
air-water flows. Analysis of turbulent length and time scales of surface fluctuations
from point measurements is also difficult. Imaging techniques with different
dimensionality, however, may close this gap. It is shown in this thesis that edge
detection methods (known from computer vision) may be used for two-dimensional
free-surface extraction (i.e. from images taken through transparant sidewalls in
laboratory flumes). Another opportunity in hydraulic laboratory studies comes with
the application of stereo vision. Low-cost RGB-D sensors can be used to gather
instantaneous, three-dimensional free-surface elevations, even in flows with very
high complexity (e.g. aerated hydraulic jumps). It will be shown that the uncertainty
of these methods is of similar order as for classical instruments.
Particle Image Velocimetry (PIV) is a well-accepted and widespread imaging
technique for velocity determination in laboratory conditions. In combination with
high-speed cameras, PIV can give time-resolved velocity fields in 2D/3D or even as
volumetric flow fields. PIV is based on a cross-correlation technique applied to small
subimages of seeded flows. The minimum size of these subimages defines the
maximum spatial resolution of resulting velocity fields. A derivative of PIV for
aerated flows is also available, i.e. the so-called Bubble Image Velocimetry (BIV). This
thesis emphasizes the capacities and limitations of both methods, using relatively
simple setups with halogen and LED illuminations. It will be demonstrated that
PIV/BIV images may also be processed by means of Optical Flow (OF) techniques.
OF is another method originating from the computer vision discipline, based on the
assumption of image brightness conservation within a sequence of images. The
Horn-Schunck approach, which has been first employed to hydraulic engineering
problems in the studies presented herein, yields dense velocity fields, i.e. pixelwise
velocity data. As discussed hereinafter, the accuracy of OF competes well with PIV
for clear-water flows and even improves results (compared to BIV) for aerated flow
conditions. In order to independently benchmark the OF approach, synthetic images
with defined turbulence intensitiy are used.
Computer vision offers new opportunities that may help to improve the
understanding of fluid mechanics and fluid-structure interactions in laboratory
investigations. In prototype environments, it can be employed for obstacle detection
(e.g. identification of potential fish migration corridors) and recognition (e.g. fish
species for monitoring in a fishway) or surface reconstruction (e.g. inspection of
hydraulic structures). It can thus be expected that applications to hydraulic
engineering problems will develop rapidly in near future. Current methods have not
been developed for fluids in motion. Systematic future developments are needed to
improve the results in such difficult conditions.
Y1  - 2023
U6  - https://doi.org/10.25926/BUW/0-172
ER  - 
TY  - JOUR
A1  - Zhang, G.
A1  - Valero, Daniel
A1  - Bung, Daniel Bernhard
A1  - Chanson, H.
T1  - On the estimation of free-surface turbulence using ultrasonic sensors
JF  - Flow Measurement and Instrumentation
N2  - Accurate determination of free-surface dynamics has attracted much research attention during the past decade and has important applications in many environmental and water related areas. In this study, the free-surface dynamics in several turbulent flows commonly found in nature were investigated using a synchronised setup consisting of an ultrasonic sensor and a high-speed video camera. Basic sensor capabilities were examined in dry conditions to allow for a better characterisation of the present sensor model. The ultrasonic sensor was found to adequately reproduce free-surface dynamics up to the second order, especially in two-dimensional scenarios with the most energetic modes in the low frequency range. The sensor frequency response was satisfactory in the sub-20 Hz band, and its signal quality may be further improved by low-pass filtering prior to digitisation. The application of the USS to characterise entrapped air in high-velocity flows is also discussed.
Y1  - 2018
U6  - https://doi.org/10.1016/j.flowmeasinst.2018.02.009
SN  - 0955-5986
VL  - 60
SP  - 171
EP  - 184
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Bung, Daniel Bernhard
A1  - Oertel, M.
A1  - Schlenkhoff, A.
A1  - Schlurmann, Torsten
ED  - Obrusnik, Ivan
T1  - Flash flood awareness and prevention in Germany
T2  - Early warning for flash floods : international workshop, Praha 2011 : workshop proceedings
Y1  - 2010
SN  - 978-80-86690-91-9
SP  - 34
EP  - 40
ER  - 
TY  - CHAP
A1  - Bung, Daniel Bernhard
A1  - Valero, Daniel
T1  - FlowCV - An open-source toolbox for computer vision applications in turbulent flows
T2  - Proceedings of the 37th IAHR World Congress August 13 – 18, 2017, Kuala Lumpur, Malaysia
Y1  - 2017
SN  - 2521-716X
SP  - 5356
EP  - 5365
ER  -