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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Geotechnical centrifuge"”.
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Geotechnical centrifuge model testing for pile foundation re-use
… The research described in this thesis, using centrifuge model testing, describes how the existing pile foundations in overconsolidated clay are likely to behave when their loading conditions are changed by unloading caused by demolition and subsequent reloading. This is done with the view to …
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Geotechnical centrifuge modeling of the behavior of light nonaqueous phase liquids (LNAPLs) in sand samples under hydraulic flushing
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Physical modelling of landslides in loose granular soils
… investigation was conducted using small-scale geotechnical centrifuge models, and a new flume facility developed to examine landslide behavior in a reduced-scale model. The first hypothesis explored in this research was that static liquefaction might preferentially occur in the saturated …
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Centrifuge modelling of railway embankments under static and cyclic loading
… is subjected to. Physical modelling in a centrifuge is one of the most effective tools available to a geotechnical engineer. Using the typical designed slopes currently used on the coal export line, the failure of these embankments can be modelled in a centrifuge to better understand the …
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Experimental and theoretical modeling of DNAPL transport in vertical fractured media
… capillary tube. A series of laboratory and geotechnical centrifuge experiments of DNAPL infiltration into vertical capillary tubes was performed to demonstrate the validity of the model, and examine the role played by capillary, gravity, viscous, and inertia forces during the infiltration …
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Dynamic Pile-Soil Interaction in Laterally Spreading Slopes
… experimental program carried out using the large geotechnical centrifuge at C-CORE in St John’s Newfoundland, to investigate the mechanism of lateral spreading and its implications for dynamic soil-pile interaction. Soil and pile responses were measured using accelerometers, pore pressure …
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A study of air flow through saturated porous media and its applications to in-situ air sparging
… characteristics. Experiments were conducted in a geotechnical centrifuge, which made it possible to test under a wide range of injection pressures while maintaining both realistic fluid and soil pressures, and sample stability. Experimental results show that air propagation characteristics through …
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Development and evaluation of an instrumentation system for high acceleration centrifuge testing of an artificial rock material
… an instrumentation system for high acceleration centrifuge testing of an artificial rock material.</p> <p>A stress analysis of the centrifuge rotor was performed to ensure its safe operation. The centrifuge was found to be safe for operation to a maximum of 1000 rpm for a payload of 15 pounds …
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Ground movements during tunnelling in sand
… process was modelled using the technique of geotechnical centrifuge modelling and the resulting ground deformations were recorded using digital image correlation. In these tests a unique tunnel face boundary condition was developed which allowed the boundary condition to be initially set as a …
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Centrifuge modelling of high shear capacity ribbed piles in stiff clay
… physical modelling of the ribbed pile in a geotechnical centrifuge. Tools with which to install and load the piles have been developed so that traditional load tests can be carried out on small scale piles of varying rib geometries. Results will be compared and discussed with respect to …
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Landslide-pipeline interaction for onshore slopes in silty sand
… landslides. Physical modelling utilizing a drum centrifuge was undertaken to recreate the environments where onshore landslides in granular soil occur. A model pipeline was constructed to match the structural stiffness of a real world pipeline. Novel instrumentation was employed to capture the …
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Seismic response of adjacent structures on dry and saturated sand
… structures have recently been conducted using geotechnical centrifuges and 1g shake tables. However, further research is needed to enhance the understanding of this complex phenomenon. A particular case of SSI is that of structures founded in fine loose saturated sandy soil. An iconic example …
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Long-term basement heave in over-consolidated clay
… methods of design. In this research, a series of geotechnical centrifuge tests were performed to investigate the heave behaviour of rectangular basements underlain by over-consolidated clay. The construction sequence, basement slab stiffness, and embedment conditions at formation level were varied …
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Experiments in tunnel-soil-structure interaction
… to masonry, were developed and tested in a geotechnical centrifuge. This enabled replication of building models with representative global stiffness values and realistic building features including strip footings, intermediate walls, a rough soil-structure interface, building layouts and …
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Centrifuge modelling of permeability in a heterogeneous coal mine backfill sequence
… placed on a previously backfilled area. Centrifuge modelling provides a means of better understanding the hydraulic behaviour and measuring the permeability of opencast backfill under controlled laboratory conditions. Based on a preselected backfill prototype, an appropriate centrifuge …
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Interaction of earthquake fault rupture with shallow foundations
… Physical modelling was carried out using the geotechnical centrifuge at the Universtiy of Dundee, where models of soil-foundation systems were subjected to reverse faulting. Fountainbleau sand was used in all the tests for its well-classified properties and a reverse fault with dip angle, a = …
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Centrifuge modelling of the impact of mechanised tunnelling on piled foundations using a miniature TBM
… make modelling the advancement of a TBM in a geotechnical centrifuge an attractive proposition. In this research, a miniature EPB TBM was developed for use in the Turner beam centrifuge at the University of Cambridge aiming to simulate the impact of tunnel construction on existing piled …
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BEHAVIOUR OF GRAVITY CAISSON ON SANDBED
… and sandbed thickness were studied by means of centrifuge model tests on the NUS geotechnical centrifuge. The simulated construction sequences included infilling of caisson, backfilling of caisson and live load imposition on the caisson. The centrifuge studies showed that the caisson would …
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Behavior and efficiency of perimeter pile groups
… project. The main research technique used is geotechnical centrifuge modelling. Samples of overconsolidated kaolin clay were prepared and tested on the centrifuge at City University london. This provided a firm clay into which pile groups could be installed in a wide variety of arrangements. …
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Movements around a tunnel in two-layer ground
… The principal methods of investigation were geotechnical centrifuge model testing and finite element analysis using the 3-Surface Kinematic Hardening (3-SKH) model, an elasto-plastic soil model implemented in the finite element program CRISP at City University, London. Both methods use …
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