Energy Geotechnics Proceedings of the 1st International Conference on Energy Geotechnics, ICEGT 2016, Kiel, Germany, 29-31 August 2016

Energy Geotechnics includes 97 technical papers presented at the 1st International Conference on Energy Geotechnics (ICEGT 2016, Kiel, Germany, 29-31 August 2016). The contributions provides significant advances and critical challenges facing the areas of fundamentals, constitutive and numerical modelling, testing techniques and energy geotechnics applications. Energy Geotechnics contains seven regular sessions and six minisymposia, with contributions on discrete and continuum based modelling as well as investigations based on experimental studies at various scales. The papers on discrete and continuum based modelling examine the behaviour of gas hydrate sediments, cyclic and Themo-Hydro-Mechanical (T-H-M) modelling of energy piles, non-linear behaviour of energy geo-storage and geo-structures, deformation of geomaterials, modelling of borehole heat exchangers and energy walls, analysis of hydraulic fracturing and discontinuities in reservoirs, engineering problems involving gas hydrates sediments, and modelling of environmental impact of energy geotechnical processes.

Keynotes Potential of district-scale geothermal energy in urban cities K. Soga, Y. Zhang & R. Choudhary Multiphysical phenomena and mechanisms involved with energy piles L. Laloui &A.F. Rotta Loria Geomechanical and numerical modeling of gas hydrate sediments M. Sánchez & X. Gai Coupled chemo-mechanics: A comprehensive process modeling for Energy Geotechnics T. Hueckel, L.B. Hu & M.M. Hu PART I: REGULAR SESSIONS Energy geo-storage and geo-structures Thermomechanical properties of a new small-scale reinforced concrete thermo-active pile for centrifuge testing A. Minto, A.K. Leung, D. Vitali & J.A. Knappett Monitoring elastic parameter changes in the vicinity of salt caverns due to cyclic loading by seismic waveform inversion D. Köhn, D. De Nil, S.A. al Hagrey,W. Rabbel, K. Khaledi, D. König &T. Schanz Deep geothermal energy wells based on artificial large area fractures J. Frankovská, M. Ondrášik & Ch. Källberg Numerical study of bearing capacity and consolidation settlement of energy piles in fine-grained soils M. Khodaparast, M.A. Kiani & H. Bayesteh Differences and challenges in salt cavern design for hydrogen, air and natural gas storage M. Schlichtenmayer & M. Klafki Effects of transient phenomena on the behaviour of thermo-active piles K.A. Gawecka, D.M. Potts, D.M.G. Taborda,W. Cui & L. Zdravkovi´c Determining the maximum operating pressure of gas storage caverns as function of the horizontal in situ geostatic stress E. Passaris & M. Clemente Thermo-mechanical behaviour of energy pile in underground railway construction site M. Adinolfi, A. Mauro, R.M.S. Maiorano, N. Massarotti & S. Aversa Geotechnical challenges of energy infra-structures Innovative deep-mixing methods for oil & gas applications G. Spagnoli, D. Bellato, P. Doherty & G. Murphy A comparative study of wind farm potential in shallow-waters in Brazil and Scotland G. Alves & S.B. Mickovski A new backfill material enhancing axial bedding of district heating pipes B.Wagner &T. Neidhart Assessment of geothermal snow-melting system used in cold region area I.-H. Ho & M. Dickson Difficult behavior of young continental “loess – like” clayey soil deposits of mud-volcanogenetic heritage in Azerbaijan E.E. Vicente, A.M. Krumb & F. Ulbricht Wind farm development and the use of geogrid-stabilised unbound platforms and floating access roads on soft ground M.A. Horton, T.L.H. Oliver & J. Cook Static analysis of Mansa Devi hill landslide using FLAC3D S. Islam & Z.H. Rizvi Shallow and deep subsurface geo-thermal systems The influence of natural convection on thermal performance of ground heat exchangers A. Bidarmaghz & G.A. Narsilio Geological models as a tool for the planning of deep geothermal projects F. Hese, K. Lademann, P. Offermann, A. Schaller & C. Thomsen Effects of ground heat exchanger variable pipe separation in ground-source heat pump systems N. Makasis, G.A. Narsilio, A. Bidarmaghz & I.W. Johnston Numerical study of the performance of energy diaphragm walls D. Rammal, H. Mroueh, S. Burlon & M.E. Suryatriyastuti Analysis of thermally induced mechanical interactions in energy pile groups A.F. Rotta Loria & L. Laloui Ground thermal response to borehole ground heat exchangers O. Mikhaylova, I.W. Johnston & G.A. Narsilio Effect of moisture migration on the thermal conductivity of a geothermal well seal C.Walton-Macaulay, J.C. Evans & L. Daher Heat content in soil-borehole thermal energy systems in the vadose zone T. Ba¸ser, Y. Dong & J.S. McCartney Advanced shallow geothermal systems: Temperature induced cracking of backfill materials and system hydraulic conductivity H. Anbergen,W. Rühaak, I. Sass & J. Frank Natural and hydraulic fractured reservoirs Studying cryogenic fracturing process using transparent specimens M. Cha, N.B. Alqahtani, B. Yao, L.Wang, X. Yin, Y.S.Wu &T.J. Kneafsey Interactions between hydraulic fracture and interfaces in layered formations S.M. Ham, T.-H. Kwon &Y.J. Sim A parametric sensitivity study on CO2 injection in deep saline aquifers accounting for hydro-mechanical microfracturing A.B. Tatomir, I. Tomac & M. Sauter Experimental study of proppant particle-particle interaction micromechanics during flow and transport in the fracture I. Tomac & L. Luo Modeling of discrete intersecting discontinuities in rock mass using XFEM/level set approach K.C. Das, S.S. Sandha, E. Rodrigues, U. Mello, I. Carol, P.E. Vargas, N.A. González, J.M. SeguraSerra & M.R. Lakshmikantha DEM modeling of hydraulic fracturing in fractured shale formation: Effect of inherent anisotropy and induced anisotropy K. Duan & C.Y. Kwok Comparison of discrete and equivalent continuum approaches to simulate the mechanical behavior of jointed rock masses N.A. González, P.E. Vargas, I. Carol, K.C. Das, S.S. Sandha, E. Rodrigues, U. Mello, J.M. Segura & M.R. Lakshmikantha THMC behavior of geomaterials Thermal-hydraulic modelling a Canadian deep geological repository P. Abootalebi & G.A. Siemens Behaviour of kaolinite and bentonite at elevated and lowered temperatures T. Ring, C. Leo & S. Liyanapathirana Analysis of cement-based thermal energy storages considering natural convection H. Hailemariam, D. Shrestha & F.Wuttke Experimental and constitutive study of the thermo-mechanical behavior of an oil sand M. Mohamadi, E. Piotrowska & R.G.Wan Effect of temperature and pressure on mechanical behavior of rock salt in underground storage caverns K. Khaledi, E. Mahmoudi, D. König &T. Schanz CTE analysis of saturated cement-based sensible heat storage materials H. Hailemariam, D. Shrestha & F.Wuttke A laboratory investigation on the thermo-mechanical behaviour of thermal piles in sand A. Rafiei, C. Arya, S.W. James, R.G. Correia & R. Fuentes Temperature dependence of elastic P- and S-wave properties of rocks: Applications to geothermal reservoir evaluation H.B. Motra & F.Wuttke Numerical methods and algorithms in energy geotechnics Inverse-volume pore pressure projection technique for the coupling of reservoir flow and geomechanics simulators P.E. Vargas, N.A. González, C.N. Mena Paz, M. de Bayser, P.W. Bryant, J.M. Segura & M.R. Lakshmikantha Axisymmetric transient modelling of a suction caisson in sand: A numerical study B. Cerfontaine, F. Collin & R. Charlier Modelling the environmental impact of underground coal gasification B.D. Roullier, P.A. Langston & X.L. Li Stability analysis of large diameter boreholes using finite element modelling C. Morris, A. Cardoso & S. Raymackers Thermo-mechanical hypoplastic interface model for fine-grained soils H. Stutz, D. Mašín, F.Wuttke & B. Prädel A novel cavity expansion-based analytical tool and its potential application for energy pile foundation H. Zhou, G. Kong, H. Liu, Y.Wu & G. Li Numerical analysis of heat conduction in granular geo-material using lattice element method Z.H. Rizvi, A.S. Sattari & F.Wuttke Thermo-hydraulic coupled modelling: Analysis of thermal enhanced backfill structures and materials for near-shore power cables K. Sembdner, H. Anbergen & F.Wuttke Experimental studies and material design in energy geotechnics Development of laboratory system for cryogenic fracturing study M. Cha, N.B. Alqahtani, B. Yao, X. Yin, Y.S.Wu &T.J. Kneafsey Steady state vs transient thermal conductivity of soils H. Hailemariam, D. Shrestha & F.Wuttke Determination of time-dependent undrained shear strength of mining landfill M. Uhlig, I. Herle & C. Karcher Enhancement of soil thermal conductivity in dry condition D. Shrestha, H. Hailemariam & F.Wuttke Heat energy recovery from waste water in the Glasgow Subway system N. Hytiris, K. Ninikas, R. Emmanuel & P.L. Younger Potential of nano material (SiC) for improving the thermal properties of sand Z.H. Rizvi, K. Sembdner, A.S. Sattari & F.Wuttke Bearing capacity and settlement of raft-pile fou

Frank Wuttke is professor and head of Geomechanics and Geotechnics at the Institute of Geoscience of Kiel University since 2013. He studied civil engineering, obtained his PhD and habilitation at the Bauhaus-University Weimar, Germany. His expertise lies in the experimental developments in material design for energy geotechnic structures, the behavior of unsaturated soils, developments in soil-structure-interaction, process monitoring methods and material identification. His working field includes dynamic material behavior, wave propagation and dynamic soil-structure interaction. Currently, he actively works in the developments of energy geostorage systems and numerical simulation of microstructure based coupled thermo-hydro-mechanical behavior of geomaterials including fracture modeling. He is member of different national and international task forces in geotechnical and energy-geotechnical fields. Sebastian Bauer is professor and leader of the Geohydromodelling group at the Institute of Geosciences of Kiel University (Germany) since 2007. He studied Physics and obtained his PhD and habilitation in Geosciences at the Centre of Applied Geosciences, Tuebingen University (Germany). His expertise is the analysis and numerical simulation of coupled non-isothermal multiphase fluid flow and reactive transport processes in subsurface porous media. Application areas include reactive transport at contaminated groundwater sites, heat and energy storage in the subsurface, shallow and middle deep geothermal use, geological CO2 sequestration, nuclear waste storage and karst genesis simulations. His special interest is the coupled phenomena encountered in these subsurface application areas and their representation in numerical codes and applications. He has coordinated large joint research projects and is currently coordinator of the ANGUS project on subsurface energy storage. Marcelo Sánchez was appointed as an associated professor in the Zachry Department of Civil Engineering TAMU in September 2009. He obtained his first degree in Civil Engineering from the Universidad Nacional de San Juan (Argentina). His Master and Ph.D. (2004) degrees are from the Universidad Politecnica de Catalunya (UPC, Barcelona, Spain). His expertise lies in the analysis of Thermo-Hydro-Mechanical and Chemical (THMC) coupled problems in geological media. The main applications of his research are related to the design of nuclear waste disposal, the study of gas production from hydrate bearing sediments, the behavior of unsaturated soils and expansive clays, design of energy piles, the behavior of frozen soils, and the design of underground compressed air storage system. He has published more than 100 peer review papers. He is acting as an Associated Editor of five International journals, andis one of the recipients of the "George Stephenson Medal 2012" (ICE, UK), and other awards. He is the Chairman of the ISSMGE Technical Committee TC308 on "Energy Geotechnics".