Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation
The process of remolding and subsequent recovery of soil shear strength is a common geotechnical problem, especially in the offshore environment, where foundations and pipelines are subjected to intermittent operational and environmental loads. A novel vertically oriented penetrometer (VOP) was used...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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American Society of Civil Engineers (ASCE)
2017
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/16108/ http://ir.unimas.my/id/eprint/16108/2/Experiments%20Using.pdf |
| _version_ | 1848837988267589632 |
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| author | Fauzan, Sahdi White, D. J. Gaudin, Christophe |
| author_facet | Fauzan, Sahdi White, D. J. Gaudin, Christophe |
| author_sort | Fauzan, Sahdi |
| building | UNIMAS Institutional Repository |
| collection | Online Access |
| description | The process of remolding and subsequent recovery of soil shear strength is a common geotechnical problem, especially in the offshore environment, where foundations and pipelines are subjected to intermittent operational and environmental loads. A novel vertically oriented penetrometer (VOP) was used in a centrifuge testing program to study the changing strength of normally consolidated kaolin from successive disturbance and reconsolidation events. The VOP is used to determine soil shear strength via an interpretation akin to the laterally loaded pile. The test series involved cyclic movement of the VOP at velocities ranging from 0.3 to 3 mm/s, with a corresponding 100-fold variation in the duration of each cycle. For the VOP tests at low velocities with high cyclic periods, the soil resistance initially reduces, but then shows an increase that scales with the elapsed time, indicating reconsolidation. Ultimately, if the cycling continues for sufficient time, the recovery in strength from reconsolidation can exceed the weakening from remolding. A previously published framework using critical-state soil mechanics concepts is shown to capture the changing resistance well. |
| first_indexed | 2025-11-15T06:48:24Z |
| format | Article |
| id | unimas-16108 |
| institution | Universiti Malaysia Sarawak |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T06:48:24Z |
| publishDate | 2017 |
| publisher | American Society of Civil Engineers (ASCE) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | unimas-161082022-06-15T06:55:06Z http://ir.unimas.my/id/eprint/16108/ Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation Fauzan, Sahdi White, D. J. Gaudin, Christophe GE Environmental Sciences TP Chemical technology The process of remolding and subsequent recovery of soil shear strength is a common geotechnical problem, especially in the offshore environment, where foundations and pipelines are subjected to intermittent operational and environmental loads. A novel vertically oriented penetrometer (VOP) was used in a centrifuge testing program to study the changing strength of normally consolidated kaolin from successive disturbance and reconsolidation events. The VOP is used to determine soil shear strength via an interpretation akin to the laterally loaded pile. The test series involved cyclic movement of the VOP at velocities ranging from 0.3 to 3 mm/s, with a corresponding 100-fold variation in the duration of each cycle. For the VOP tests at low velocities with high cyclic periods, the soil resistance initially reduces, but then shows an increase that scales with the elapsed time, indicating reconsolidation. Ultimately, if the cycling continues for sufficient time, the recovery in strength from reconsolidation can exceed the weakening from remolding. A previously published framework using critical-state soil mechanics concepts is shown to capture the changing resistance well. American Society of Civil Engineers (ASCE) 2017-04-01 Article PeerReviewed text en http://ir.unimas.my/id/eprint/16108/2/Experiments%20Using.pdf Fauzan, Sahdi and White, D. J. and Gaudin, Christophe (2017) Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation. Journal of Geotechnical and Geoenvironmental Engineering, 143 (4). pp. 1-7. ISSN 1090-0241 http://ascelibrary.org/doi/full/10.1061/%28ASCE%29GT.1943-5606.0001637 DOI: 10.1061/(ASCE)GT.1943-5606.0001637 |
| spellingShingle | GE Environmental Sciences TP Chemical technology Fauzan, Sahdi White, D. J. Gaudin, Christophe Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| title | Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| title_full | Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| title_fullStr | Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| title_full_unstemmed | Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| title_short | Experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| title_sort | experiments using a novel penetrometer to assess changing strength of clay during remolding and reconsolidation |
| topic | GE Environmental Sciences TP Chemical technology |
| url | http://ir.unimas.my/id/eprint/16108/ http://ir.unimas.my/id/eprint/16108/ http://ir.unimas.my/id/eprint/16108/ http://ir.unimas.my/id/eprint/16108/2/Experiments%20Using.pdf |