Research on Altered Rock at a Hydropower StationBased on Triaxial Unloading Test
In order to study the effects of water on the deformation and strength of the altered rock during unloading, this paper obtains the micro-structure and mineral distribution of the altered rock at the right dam abutment of a hydropower station in southwest China by SEM (scanning electron microscope),...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.03.015 |
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| Summary: | In order to study the effects of water on the deformation and strength of the altered rock during unloading, this paper obtains the micro-structure and mineral distribution of the altered rock at the right dam abutment of a hydropower station in southwest China by SEM (scanning electron microscope), then analyzes and discusses the influences of water in different stress paths on the stress-strain curves, deformation characteristics and strength characteristics of altered rock through triaxial loading and unloading tests of rock samples under natural state and saturated state. The results indicate that: compared with loading test, the cohesive force of rock sample increased and its angle of internal friction decreased under unloading test; based on triaxial loading and unloading tests, the strength of altered rock under saturated state is lower than that under natural state; the strength of altered rock decreases obviously after being exposed to water. |
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| ISSN: | 1001-9235 |