紫鹊界梯田失稳机制

doi:10.13278/j.cnki.jjuese.20220268

Journal of Jilin University(Earth Science Edition) ›› 2024, Vol. 54 ›› Issue (2): 581-591.doi: 10.13278/j.cnki.jjuese.20220268

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Destabilization Mechanism of Ziquejie Terrace

Ouyang Qi1,2,3，Chen Xin1，Wei Runchu1,2,3，Wu Shimeng4，Zhu Zhiyuan5

1. School of Hydraulic and Environmental Engineering, Changsha University of Science & Technology, Changsha 410004，China
2. Hunan Provincial Key Laboratory of Water and Sediment Science and Water Disaster Prevention and Control, Changsha University
of Science & Technology, Changsha 410004，China
3. Hunan Provincial Key Laboratory of Water Environment Treatment and Ecological Restoration of Dongting Lake, Changsha
University of Science & Technology, Changsha 410004，China
4. Hunan Hengyang Hydrology and Water Resources Survey Center, Hengyang 421001, Hunan，China
5. Hunan Loudi Hydrology and Water Resources Survey Center, Loudi 417000，Hunan，China

Online:2024-03-26 Published:2024-04-09
Supported by:
Supported by the Outstanding Youth Project of Hunan Provincial Department of Education （21B0314），the National Natural Science Foundation of China （41602264），the Natural Science Foundation of Hunan Province （2020JJ5572，2023JJ40021） and the “Double First-Class” Scientific Research International Cooperation Expansion Project of Changsha University of Science & Technology （2019IC08）

Abstract

Abstract:

In order to discuss the influence of rainfall infiltration on the stability of granite terrace slope, this paper takes the Ziquejie terrace in Hunan Province as an example. Based on the analysis of the geological conditions of Ziquejie terrace, the seepage field and stability of different slope gradients and different soil layer thicknesses under rainstorm conditions were analyzed based on the coupling of multiple modules of the finite element numerical simulation software Geostudio. The results show that under the working condition of 90 mm/d rainfall intensity and 5 days rainfall duration, the slopes with 35° and 40° gradients are in a state of destabilization, and the stability coefficient is negatively correlated with the increase of slope gradient; The thicker the fully weathered soil layer is, the lower the safety factor of the slope is. After 5 days of rainfall, the stability coefficients of different soil layers under different working conditions are similar. However, when there is no rainfall, the thinner the fully weathered soil layer is, the more stable the slope is.

Key words: Ziquejie terrace, granite, rainfall infiltration, slope stability, gradient, soil layer thikness

CLC Number:

P642.2

Ouyang Qi, Chen Xin, Wei Runchu, Wu Shimeng, Zhu Zhiyuan.

Destabilization Mechanism of Ziquejie Terrace [J].Journal of Jilin University(Earth Science Edition), 2024, 54(2): 581-591.

References

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