Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia

Xia Yuyun; Liu Min; Qiao Jianwei; Liu Zhenghong; Wang Ran; Zhou Renfei; Li Xinyang

doi:10.3969/j.issn.1007-2993.2023.03.002

Volume 37 Issue 3

Jun. 2023

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Xia Yuyun, Liu Min, Qiao Jianwei, Liu Zhenghong, Wang Ran, Zhou Renfei, Li Xinyang. Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2023, 37(3): 262-267. doi: 10.3969/j.issn.1007-2993.2023.03.002

Citation:

Xia Yuyun, Liu Min, Qiao Jianwei, Liu Zhenghong, Wang Ran, Zhou Renfei, Li Xinyang. Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2023, 37(3): 262-267. doi: 10.3969/j.issn.1007-2993.2023.03.002

Citation:

Xia Yuyun, Liu Min, Qiao Jianwei, Liu Zhenghong, Wang Ran, Zhou Renfei, Li Xinyang. Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2023, 37(3): 262-267. doi: 10.3969/j.issn.1007-2993.2023.03.002

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Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia

doi: 10.3969/j.issn.1007-2993.2023.03.002

Xia Yuyun^{1, 2
,},
Liu Min^{1, 2
,
,},
Qiao Jianwei^{1, 2},
Liu Zhenghong^{1, 2},
Wang Ran^{1, 2},
Zhou Renfei³,
Li Xinyang³

1.
China Jikan Research Institute of Engineering Investigations and Design Co., Ltd., Xi’an 710043, Shaanxi, China
2.
Key Laboratory of Special Geotechnical Properties and Treatment in Shaanxi Province, Xi’an 710043, Shaanxi, China
3.
China Heavy Machinery Co., Ltd., Beijing 100070, China

Received Date: 2021-11-06
Available Online: 2023-06-08
Publish Date: 2023-06-08

Abstract

Abstract

For an ancient landslide on the upstream right bank of a hydropower station in Southeast Asia, the geological characteristics, sliding zone characteristics, and deformation characteristics of the landslide were studied through drilling, geological investigation, and long-term monitoring, and the mechanism of reactivated ancient landslide was explored. The results indicate that: (1) Unloading at the foot of the slope and heavy rainfall are the main reasons for the reactivation of ancient landslides. (2) Road excavation leads to changes in the stress field, causing landslides to "revive" along the contact surface of shallow Quaternary slope deposits, slate, and sandstone, resulting in creep deformation towards the free surface. (3) The deformation of ancient landslides is positively correlated with rainfall. During the rainy season with high intensity rainfall, the displacement and deformation rate rapidly increase, and during the dry season without rainfall, the landslide is basically in a stable state. (4) The deep displacement monitoring data shows that there is no sudden change in displacement in the deep part of the ancient landslide, and rainfall has little effect on the deep displacement.
- ancient landslide,
- inclination monitoring,
- apparent monitoring,
- reactivation mechanism

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Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia

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Reactivation Deformation Mechanism of Ancient Landslide at a Hydropower Station in Southeast Asia

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