Abstract
The load transfer mechanism of geosynthetic reinforced columns supported (GRCS) embankments is based on soil arching within fill layers and membrane action of the geosynthetic layers. Several design guidelines are available in the literature for these embankments based on the arching and membrane theories. However the shape of the arch and its evolution are not consistent among these guidelines. Therefore, they yield different results for the same embankment in predicting loads transferred to the Deep Cement Mixing (DCM) columns, geosynthetic and soft foundation soil. This paper investigates in detail the shape of the arches formed above the columns and their evolution during the process of embankment construction. A two-dimensional numerical model is used for this investigation and the results show that they are semi-circular or catenary in shape and the size changes during the loading process. Results of this study show that there are inconsistencies in current design recommendations for arch formation and critical embankment height.
| Original language | English |
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| Title of host publication | From Materials to Structures : Advancement through Innovation: Proceedings of the 22nd Australian Conference on the Mechanics of Structures and Materials, University of Technology, Sydney, Australia, 11-14 December 2012 |
| Publisher | CRC Press |
| Pages | 647-652 |
| Number of pages | 6 |
| ISBN (Print) | 9780415633185 |
| Publication status | Published - 2012 |
| Event | Australasian Conference on the Mechanics of Structures and Materials - Duration: 11 Dec 2012 → … |
Conference
| Conference | Australasian Conference on the Mechanics of Structures and Materials |
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| Period | 11/12/12 → … |
Keywords
- roads
- embankments
- concrete construction
- geosynthetics
- columns