Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil
After the Baihetan Dam reservoir area is impounded, the high fill site will experience the rise and fall of water level for a long time, which is very disadvantageous to the deformation and stability of the site. This paper focuses on the stability of high-fill sites. It is part of the Baihetan Dam...
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Editorial Office of Pearl River
2024-08-01
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| Series: | Renmin Zhujiang |
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| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2024.08.003 |
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| author | WU Guoli JI Binbin LIANG Junjun HUANG Zhongchun XIONG Tanqing |
| author_facet | WU Guoli JI Binbin LIANG Junjun HUANG Zhongchun XIONG Tanqing |
| author_sort | WU Guoli |
| collection | DOAJ |
| description | After the Baihetan Dam reservoir area is impounded, the high fill site will experience the rise and fall of water level for a long time, which is very disadvantageous to the deformation and stability of the site. This paper focuses on the stability of high-fill sites. It is part of the Baihetan Dam project in the water-level-fluctuating zone of the resettlement area in the reservoir area. The research examines the effects of wet-dry cycles and saturation on coarse-grained soil. Methods include large-scale triaxial shear and creep tests. The investigation assesses stress-strain relationships and shear morphology. It also evaluates the long-term strength and deformation laws. Key conclusions are presented as follows: ① The strength of coarse-grained soil gradually decreases with an increase in the number of dry-wet cycles. ② When the number of dry-wet cycles <italic>n</italic>≤3, coarse-grained soil samples first shrink and then dilate; when <italic>n</italic> >3, coarse-grained soil only undergoes shear deformation. ③ The peak deviating stress of coarse-grained soil decreases gradually with the increase in the number of dry-wet cycles, and the higher the confining pressure, the greater the effect of dry-wet cycles on the damage and deterioration of the shear strength of coarse-grained soil. ④ The long-term strength of coarse-grained soil is lower than that of shear failure strength. The drop range of low confining pressure is smaller, generally reaching 80% or even higher of shear failure strength under normal circumstances; under high confining pressure, the long-term strength damage of coarse-grained soil is greater because of particle breakage. |
| format | Article |
| id | doaj-art-ac7c97962c1a4bc5b171a6baad15c78d |
| institution | Kabale University |
| issn | 1001-9235 |
| language | zho |
| publishDate | 2024-08-01 |
| publisher | Editorial Office of Pearl River |
| record_format | Article |
| series | Renmin Zhujiang |
| spelling | doaj-art-ac7c97962c1a4bc5b171a6baad15c78d2025-01-15T03:01:21ZzhoEditorial Office of Pearl RiverRenmin Zhujiang1001-92352024-08-0145192866690738Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained SoilWU GuoliJI BinbinLIANG JunjunHUANG ZhongchunXIONG TanqingAfter the Baihetan Dam reservoir area is impounded, the high fill site will experience the rise and fall of water level for a long time, which is very disadvantageous to the deformation and stability of the site. This paper focuses on the stability of high-fill sites. It is part of the Baihetan Dam project in the water-level-fluctuating zone of the resettlement area in the reservoir area. The research examines the effects of wet-dry cycles and saturation on coarse-grained soil. Methods include large-scale triaxial shear and creep tests. The investigation assesses stress-strain relationships and shear morphology. It also evaluates the long-term strength and deformation laws. Key conclusions are presented as follows: ① The strength of coarse-grained soil gradually decreases with an increase in the number of dry-wet cycles. ② When the number of dry-wet cycles <italic>n</italic>≤3, coarse-grained soil samples first shrink and then dilate; when <italic>n</italic> >3, coarse-grained soil only undergoes shear deformation. ③ The peak deviating stress of coarse-grained soil decreases gradually with the increase in the number of dry-wet cycles, and the higher the confining pressure, the greater the effect of dry-wet cycles on the damage and deterioration of the shear strength of coarse-grained soil. ④ The long-term strength of coarse-grained soil is lower than that of shear failure strength. The drop range of low confining pressure is smaller, generally reaching 80% or even higher of shear failure strength under normal circumstances; under high confining pressure, the long-term strength damage of coarse-grained soil is greater because of particle breakage.http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2024.08.003coarse-grained soildry-wet cycleconventional triaxial testcreep testdamage deteriorationlong-term strength |
| spellingShingle | WU Guoli JI Binbin LIANG Junjun HUANG Zhongchun XIONG Tanqing Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil Renmin Zhujiang coarse-grained soil dry-wet cycle conventional triaxial test creep test damage deterioration long-term strength |
| title | Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil |
| title_full | Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil |
| title_fullStr | Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil |
| title_full_unstemmed | Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil |
| title_short | Triaxial Tests on Dry-wet Cycle and Creep Behavior of High-fill Coarse-grained Soil |
| title_sort | triaxial tests on dry wet cycle and creep behavior of high fill coarse grained soil |
| topic | coarse-grained soil dry-wet cycle conventional triaxial test creep test damage deterioration long-term strength |
| url | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2024.08.003 |
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