Constitutive Model of Swelling Gypsum Rock
Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of sidewalls during construction and operation. It is of practical significance to study the swelling mechanical behavior of such rocks by...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8878005 |
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| _version_ | 1832565839705931776 |
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| author | Chongbang Xu Xiaojing Gao Kaishun Zhang Zhiguo Liu Fan Zhao |
| author_facet | Chongbang Xu Xiaojing Gao Kaishun Zhang Zhiguo Liu Fan Zhao |
| author_sort | Chongbang Xu |
| collection | DOAJ |
| description | Swelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of sidewalls during construction and operation. It is of practical significance to study the swelling mechanical behavior of such rocks by tests. Swelling strain tests and swelling stress tests were performed by swelling test apparatus to study the variation of swelling strain with time and the swelling stress-strain relationship for gypsum rock samples, respectively. Three stages of the swelling strain on the time-strain curve of gypsum rock samples were noticed, which are defined as rapid swelling stage, slow swelling stage, and steady stage. And it was further found that the swelling strain caused in the slow swelling stage is of 76% of the total swelling strain. A constitutive model is proposed to describe the stress-strain relationship in swelling considering the swelling deformation and swelling pressure. The proposed model was verified using test data, which shows good agreements in describing the relationship between swelling strain and swelling stress, also in the conditions of maximum swelling strain and maximum swelling stress under lateral restraint situations. |
| format | Article |
| id | doaj-art-1802356dee8c4f08b7cc0d04f3aedeb3 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-1802356dee8c4f08b7cc0d04f3aedeb32025-02-03T01:06:22ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88780058878005Constitutive Model of Swelling Gypsum RockChongbang Xu0Xiaojing Gao1Kaishun Zhang2Zhiguo Liu3Fan Zhao4Bridge and Tunnel Research Center, Research Institute of Highway Ministry of Transport, Beijing 100088, ChinaBridge and Tunnel Research Center, Research Institute of Highway Ministry of Transport, Beijing 100088, ChinaThe 5th Engineering Co., Ltd. of China Railway 11th Bureau Group, Chongqing 400037, ChinaThe 5th Engineering Co., Ltd. of China Railway 11th Bureau Group, Chongqing 400037, ChinaThe 5th Engineering Co., Ltd. of China Railway 11th Bureau Group, Chongqing 400037, ChinaSwelling of soft rock, such as gypsum rock, is one of the major threats in tunnel engineering, causing structure damages such as floor heave and inward movement of sidewalls during construction and operation. It is of practical significance to study the swelling mechanical behavior of such rocks by tests. Swelling strain tests and swelling stress tests were performed by swelling test apparatus to study the variation of swelling strain with time and the swelling stress-strain relationship for gypsum rock samples, respectively. Three stages of the swelling strain on the time-strain curve of gypsum rock samples were noticed, which are defined as rapid swelling stage, slow swelling stage, and steady stage. And it was further found that the swelling strain caused in the slow swelling stage is of 76% of the total swelling strain. A constitutive model is proposed to describe the stress-strain relationship in swelling considering the swelling deformation and swelling pressure. The proposed model was verified using test data, which shows good agreements in describing the relationship between swelling strain and swelling stress, also in the conditions of maximum swelling strain and maximum swelling stress under lateral restraint situations.http://dx.doi.org/10.1155/2020/8878005 |
| spellingShingle | Chongbang Xu Xiaojing Gao Kaishun Zhang Zhiguo Liu Fan Zhao Constitutive Model of Swelling Gypsum Rock Advances in Civil Engineering |
| title | Constitutive Model of Swelling Gypsum Rock |
| title_full | Constitutive Model of Swelling Gypsum Rock |
| title_fullStr | Constitutive Model of Swelling Gypsum Rock |
| title_full_unstemmed | Constitutive Model of Swelling Gypsum Rock |
| title_short | Constitutive Model of Swelling Gypsum Rock |
| title_sort | constitutive model of swelling gypsum rock |
| url | http://dx.doi.org/10.1155/2020/8878005 |
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