Combinated seepage failure tests on cushion and transition materials for Cihaxia Hydropower Station

CUI Jiaquan; MA Lingyun; DUAN Junbang; ZHANG Lu; CUI Jiaming; HE Jingbin; CHANG Yupeng

doi:10.11779/CJGE20221129

Volume 46 Issue 1

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Chinese Journal of Geotechnical Engineering > 2024 > 46(1): 216-222. > DOI: 10.11779/CJGE20221129

CUI Jiaquan, MA Lingyun, DUAN Junbang, ZHANG Lu, CUI Jiaming, HE Jingbin, CHANG Yupeng. Combinated seepage failure tests on cushion and transition materials for Cihaxia Hydropower Station[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(1): 216-222. DOI: 10.11779/CJGE20221129

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Combinated seepage failure tests on cushion and transition materials for Cihaxia Hydropower Station

1.
Northwest Engineering Corporation Limited Engineering Experiment and Monitoring Institute, Xi'an 710000, China
2.
Qinghai Yellow River Upstream Hydropower Development Corporation Limited Engineering Construction Branch, Xining 810003, China

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Received Date: September 13, 2022
Available Online: May 10, 2023

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Abstract

Abstract

For the ultra-high concrete face rockfill dams, natural sand and gravel materials are used as the dam materials for rockfill dam projects. The combined impermeability stability of the dam partition materials is very important to the dam safety. In this study, the self-developed high-head large-scale permeability test equipments are used to conduct the combined seepage failure tests on the sand and gravel dam materials for Cihaxia Hydropower Station. The evolution process of seepage characteristics of the filling materials in each district are monitored. The anti-filtering protection effects of the transition materials on the cushion materials are verified. The results may provide data reference for the optimization of gradation design of dam filling materials of Cihaxia Hydropower Station and the demonstration of seepage stability safety.
- cushion material,
- transition material,
- seepage deformation,
- original gradation sample,
- combined seepage failure test

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