Numerical Modelling of Construction Processes in Geotechnical Engineering for Urban Environment

Dr Th. Triantafyllidis, Institute of Foundation Engineering and Soil Mechanics, Ruhr-University Bochum, Germany

• Preface 1. Deep excavations: Selected topics in numerical simulation of supported excavations; Determination of soil parameters for modeling of deep excavations utilizing an inverse approach; Comparison and feasibility of three dimensional finite element modelling of deep excavations using non-linear soil models; Lessons learned from case studies of excavation support systems through Chicago glacial clays; Influence of the construction procedure on the displacements of excavation walls; 2. Diaphragm walls: Finite element analysis of the excavation of the new Garibaldi station of Napoli underground; The impact of diaphragm wall construction on the serviceability of adjacent strip foundations in soft ground; A comparison between monitoring data and numerical calculation of a diaphragm wall construction in Rotterdam; Small scale model tests on fresh concrete pressure in diaphragm wall panels; Metro line U5 Berlin – Deformation of diaphragm walls; 3. Soil improvement: Vibro stone column installation and its effect on ground improvement; On modelling vibro-compaction of dry sands; FE simulations of the installation of granular columns in soft soils; 4. Tunnelling: Large scale three-dimensional finite element analysis of underground construction; Iterative solution of intersecting tunnels using the generalised Jacobi preconditioner; Numerical modelling of a reinforcement process by umbrella arch; 5. Ground freezing: An elastic-viscoplastic model for frozen soils; Numerical and physical modeling of artificial ground freezing; Freezing of jet-grouted soil – comparison of numerical calculations and field data; FE-analysis of ground freezing for the construction of a tunnel cross connection; Ground freezing: an efficient method to control the settlements of buildings; Underground line U5 ‘Unter den Linden’ Berlin, Germany Structural and thermal FE-calculations for ground freezing design; 6. Piling: Numerical modelling of pile jacking, driving and vibratory driving; Bored and screwed piles, continuum and discontinuum approaches; Numerical simulation of construction-induced stresses around Rammed Aggregate Piers; Numerical modelling of the case history of a piled raft with a viscohypoplastic model; Failure of a micro-pile wall during remodelling of a hotel: a backanalysis; 7. Numerical modelling and miscellaneous: Incorporation of meta-stable structure into hypoplasticity; Numerical simulation of consolidation and deformation of pulpy fine slimes due to re-contouring and covering of large uranium mill tailing ponds at Wismut; Numerical simulation of underground works and application to cut and cover construction; Effects of spatial variability of cement-treated soil on undrained bearing capacity