Abstract
In past studies, an advanced critical state soil was proposed and successively adopted to simulate stiff over-consolidated London clay in a series of underground construction projects. The advanced model takes complex soil characteristics such as elastic anisotropy, strength anisotropy, small strain stiffness degradation and etc. into account, and thus produced good evaluation of excavation-induced ground movements. However, limited relevant research was available in literature regarding application of the model to soft clay. In this paper, the suitability of the advanced constitutive model to capture the behaviour of Shanghai soft clay has been examined. A series of consolidated undrained and drained triaxial tests on Shanghai soft clay were simulated using the advanced soil model programmed in Abaqus, and the associated soil model parameters were determined. Based on the soil parameters, 2D finite element analysis of a deep excavation was carried out to investigate the lateral retaining wall displacements. The computed results show that, compared with conventional Mohr-Coulomb and Modified Cam-clay models, the advanced soil model gives rise to a better agreement with field measurements.
| Original language | English |
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| Pages | 642-653 |
| Number of pages | 12 |
| Publication status | Published - 2017 |
| Event | 15th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2017 - Wuhan, China Duration: 19 Oct 2017 → 23 Oct 2017 |
Conference
| Conference | 15th International Conference of the International Association for Computer Methods and Advances in Geomechanics, IACMAG 2017 |
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| Country/Territory | China |
| City | Wuhan |
| Period | 19/10/17 → 23/10/17 |
Keywords
- Advanced Critical State Soil Model
- Retaining Wall Displacement
- Shanghai Soft Clay
- Soil Parameters Determination