Coupled thermo-hydro-mechanical processes of fractured media : mathematical and experimental studies : recent developments of DECOVALEX project for radioactive waste repositories

This work brings together the results, information and data that emerged from an international cooperative project, DECOVALEX, 1992-1995. This project was concerned with the mathematical and experimental studies of coupled thermo(T) -hydro(H) -mechanical(M) processes in fractured media related to radioactive waste disposal. The book presents, for the first time, the systematic formulation of mathematical models of the coupled T-H-M processes of fractured media, their validation against theoretical bench-mark tests, and experimental studies at both laboratory and field scales. It also presents, for the first time, a comprehensive analysis of continuum, and discrete approaches to the study of the problems of (as well as a complete description of), the computer codes applied to the studies. The first two chapters provide a conceptual introduction to the coupled T-H-M processes in fractured media and the DECOVALEX project. The next seven chapters give a state-of-the-art survey of the constitutive models of rock fractures and formulation of coupled T-H-M phenomena with continuum and discontinuum approaches, and associated numerical methods. A study on the three generic Bench-Mark Test problems and six Test Case problems of laboratory and field experiments are reported in chapters 10 to 18. Chapter 19 contains lessons learned during the project. The research contained in this book will be valuable for designers, practising engineers and national waste management officials who are concerned with planning, design and performance, and safety assessments of radioactive waste repositories. Researchers and postgraduate students working in this field will also find the book of particular relevance. Content: Foreword Pages vii-ix Preface Pages xi-xiii List of contributors Pages xv-xvii A conceptual introduction to coupled thermo-hydro-mechanical processes in fractured rocks Original Research Article Pages 1-24 Chin-Fu Tsang, Ove Stephansson Validation of mathematical models against experiments for radioactive waste repositories — DECOVALEX experience Original Research Article Pages 25-56 L. Jing, C.F. Tsang, O. Stephansson, F. Kautsky Constitutive models for rock joints Original Research Article Pages 57-92 Y. Ohnishi, T. Chan, L. Jing Coupled thermohydroelasticity phenomena in variably saturated fractured porous rocks ‐‐ formulation and numerical solution Original Research Article Pages 93-134 Jahan Noorishad, Chin-Fu Tsang Continuum representation of coupled hydromechanic processes of fractured media: Homogenisation and parameter identification Original Research Article Pages 135-164 A. Stietel, A. Millard, E. reille, E. Vuillod, A. Thoraval, R. Ababou FEM analysis of coupled THM processes in fractured media with explicit representation of joints Original Research Article Pages 165-180 S-M. Tijani, G. Vouille Distinct element models for the coupled T-H-M processes: Theory and implementation Original Research Article Pages 181-211 Mikko P. Ahola, Alain Thoraval, Asadul H. Chowdhury Modelling approaches for discrete fracture network flow analysis Original Research Article Pages 213-229 A.W. Herbert Influence of fictitious outer boundaries on the solution of external field problems Original Research Article Pages 231-243 G. Rehbinder Generic study of coupled THM processes of nuclear waste repositories as far-field initial boundary value problems (BMT1) Original Research Article Pages 245-279 A. Millard, A. Stietel, A. Bougnoux, E. Vuillod Generic study of coupled T-H-M processes of nuclear waste repositories as near-field initial boundary value problems (BMT2) Original Research Article Pages 281-309 T. Chan, K. Khair, E. Vuillod Generic study of coupled T-H-M processes in the near field (BMT3) Original Research Article Pages 311-340 P. Wilcock Mathematical simulations of coupled THM processes of Fanay-Augères field test by distinct element and discrete finite element methods Original Research Article Pages 341-368 A. Rejeb Experimental investigation and mathematical simulation of coupled T-H-M processes of the engineered buffer materials, the TC3 problem Original Research Article Pages 369-392 T. Fujita, A. Kobayashi, L. Börgesson Coupled mechanical shear and hydraulic flow behavior of natural rock joints Original Research Article Pages 393-423 Mikko P. Ahola, Sitakanta Mohanty, Axel Makurat Experimental investigation and mathematical simulation of a borehole injection test in deformable rocks Original Research Article Pages 425-448 J. Rutgvist, S. Follin, K. Khair, S. Nguyen, P. Wilcock Experimental study on the coupled T-H-M-processes of single rock joint with a triaxial test chamber Original Research Article Pages 449-465 J. Pöllä, A. Kuusela-Lahtinen, J. Kajanen Experimental study on dynamic behavior of rock joints Original Research Article Pages 467-494 Mikko P. Ahola, Sui-Min Hsiung, Daniel D. Kana Lessons learned from DECOVALEX Original Research Article Pages 495-504 L. Dewiere, F. Plas, C.F. Tsang Short description of VIPLEF code Original Research Article Pages 507-511 S-M. Tijani Short description of FLAC version 3.2 Original Research Article Pages 513-522 Jan I. Israelsson Short Descriptions of UDEC and 3DEC Original Research Article Pages 523-528 Jan I. Israelsson The NAPSAC fracture network code Original Research Article Pages 529-538 P. Wilcock Description of the computer code FRACON Original Research Article Pages 539-544 T.S. Nguyen Thames Original Research Article Pages 545-549 Y. Ohnishi, A. Kobayashi ROCMAS simulator; A thermohydromechanical computer code Original Research Article Pages 551-558 Jahan Noorishad, Chin-Fu Tsang Short description of CASTEM 2000 and TRIO-EF Original Research Article Pages 559-564 A. Millard ABAQUS Original Research Article Pages 565-570 L. Börgesson Subject index Pages 571-574 Author index Page 575