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|Title:||Centrifuge modelling of a steel pipe umbrella arch for tunnelling in clay|
|Authors:||Yeo, C.H. |
|Citation:||Yeo, C.H.,Lee, F.H.,Hegde, A.,Juneja, A. (2010). Centrifuge modelling of a steel pipe umbrella arch for tunnelling in clay. Physical Modelling in Geotechnics - Proceedings of the 7th International Conference on Physical Modelling in Geotechnics 2010, ICPMG 2010 1 : 611-616. ScholarBank@NUS Repository.|
|Abstract:||A series of limit analysis studies on steel pipe umbrella models were conducted on the National University of Singapore (NUS) Geotechnical Centrifuge. The studies investigate the length of steel pipe embedment on the mode of collapse of the tunnel heading. Half symmetry models were tested to observe deformation and failure mechanisms of the longitudinal section. The model tunnel and umbrella arch were installed in a heavily compressed kaolin clay block. Brass rods were used to model the steel pipe umbrella. A half steel pipe was used to model the tunnel lining. Zinc chloride solution was used to support the tunnel heading. Excavation was simulated by releasing the zinc chloride solution after consolidating the model in the centrifuge. A series of tunnel heading configurations were modelled with differences in the length of brass rods embedded into the face, from which a transition of failure mechanism was observed. © 2010 Taylor & Francis Group, London.|
|Source Title:||Physical Modelling in Geotechnics - Proceedings of the 7th International Conference on Physical Modelling in Geotechnics 2010, ICPMG 2010|
|Appears in Collections:||Staff Publications|
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