Threshold stress and deformation characteristics of clay subgrade for railway tracks
Clay subgrade beneath railway track experiences stress of cyclic nature that can result in progressive shear failure at a stress level lower than the clay monotonic strength. This paper described the effective stress analysis of threshold stress and the deformation characteristics from a series of c...
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| Format: | Conference Paper |
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Korean Geotechnical Society
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/11552 |
| _version_ | 1848747836813869056 |
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| author | Loh, Richard Nikraz, Hamid |
| author2 | Prof Choong-Ki Chung |
| author_facet | Prof Choong-Ki Chung Loh, Richard Nikraz, Hamid |
| author_sort | Loh, Richard |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Clay subgrade beneath railway track experiences stress of cyclic nature that can result in progressive shear failure at a stress level lower than the clay monotonic strength. This paper described the effective stress analysis of threshold stress and the deformation characteristics from a series of cyclic undrained triaxial tests carried out on reconstituted kaolin clay, which simulates the behavior of clay subgrade under cyclic loading conditions due to the loading of passing trains/vehicles. Cyclic loading frequency typical to that experienced by railway track foundations near subgrade surface was employed. In addition, a critical state model is proposed for predicting threshold stress of saturated clay under undrained cyclic compression without resorting to lengthy laboratory testing. Validated by observed tests data, the model provides a lower-bound solution of the threshold stress of clay subgrade for rail tracks, from the measured values of fundamental soil properties, based on consolidation history and current state of stress. |
| first_indexed | 2025-11-14T06:55:29Z |
| format | Conference Paper |
| id | curtin-20.500.11937-11552 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:55:29Z |
| publishDate | 2011 |
| publisher | Korean Geotechnical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-115522017-11-02T05:04:09Z Threshold stress and deformation characteristics of clay subgrade for railway tracks Loh, Richard Nikraz, Hamid Prof Choong-Ki Chung undrained cyclic testing railway track subgrade threshold stress critical state model clay subgrade Clay subgrade beneath railway track experiences stress of cyclic nature that can result in progressive shear failure at a stress level lower than the clay monotonic strength. This paper described the effective stress analysis of threshold stress and the deformation characteristics from a series of cyclic undrained triaxial tests carried out on reconstituted kaolin clay, which simulates the behavior of clay subgrade under cyclic loading conditions due to the loading of passing trains/vehicles. Cyclic loading frequency typical to that experienced by railway track foundations near subgrade surface was employed. In addition, a critical state model is proposed for predicting threshold stress of saturated clay under undrained cyclic compression without resorting to lengthy laboratory testing. Validated by observed tests data, the model provides a lower-bound solution of the threshold stress of clay subgrade for rail tracks, from the measured values of fundamental soil properties, based on consolidation history and current state of stress. 2011 Conference Paper http://hdl.handle.net/20.500.11937/11552 Korean Geotechnical Society restricted |
| spellingShingle | undrained cyclic testing railway track subgrade threshold stress critical state model clay subgrade Loh, Richard Nikraz, Hamid Threshold stress and deformation characteristics of clay subgrade for railway tracks |
| title | Threshold stress and deformation characteristics of clay subgrade for railway tracks |
| title_full | Threshold stress and deformation characteristics of clay subgrade for railway tracks |
| title_fullStr | Threshold stress and deformation characteristics of clay subgrade for railway tracks |
| title_full_unstemmed | Threshold stress and deformation characteristics of clay subgrade for railway tracks |
| title_short | Threshold stress and deformation characteristics of clay subgrade for railway tracks |
| title_sort | threshold stress and deformation characteristics of clay subgrade for railway tracks |
| topic | undrained cyclic testing railway track subgrade threshold stress critical state model clay subgrade |
| url | http://hdl.handle.net/20.500.11937/11552 |