考虑移动非达西流界面的弱透水层释水固结模型

赵月春; 王全荣

doi:10.3799/dqkx.2023.046

Volume 48 Issue 9

Sep. 2023

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Article Navigation > Earth Science > 2023 > 48(9): 3494-3503

Zhao Yuechun, Wang Quanrong, 2023. Water Release and Consolidation Model of Aquitard Considering Moving Non-Darcy Flow Interface. Earth Science, 48(9): 3494-3503. doi: 10.3799/dqkx.2023.046

Citation:

Zhao Yuechun, Wang Quanrong, 2023. Water Release and Consolidation Model of Aquitard Considering Moving Non-Darcy Flow Interface. Earth Science, 48(9): 3494-3503. doi: 10.3799/dqkx.2023.046

Zhao Yuechun, Wang Quanrong, 2023. Water Release and Consolidation Model of Aquitard Considering Moving Non-Darcy Flow Interface. Earth Science, 48(9): 3494-3503. doi: 10.3799/dqkx.2023.046

Citation:

Zhao Yuechun, Wang Quanrong, 2023. Water Release and Consolidation Model of Aquitard Considering Moving Non-Darcy Flow Interface. Earth Science, 48(9): 3494-3503. doi: 10.3799/dqkx.2023.046

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Water Release and Consolidation Model of Aquitard Considering Moving Non-Darcy Flow Interface

doi: 10.3799/dqkx.2023.046

Zhao Yuechun^,,
Wang Quanrong^{,
,}

School of Environmental Studies, China University of Geosciences, Wuhan 430078, China

Received Date: 2022-12-22
Available Online: 2023-10-07
Publish Date: 2023-09-25

Abstract

Abstract

The slow seepage velocity in the aquitard is not conducive to monitoring its water release process, so the consolidation model is often used to comprehensively evaluate the evolution process of land subsidence. However, the traditional consolidation model assumes that the seepage law in the aquitard meets Darcy's law, which may be inconsistent with the actual situation. Therefore, a consolidation model considering the interface of moving non-Darcy flow region is established in this study, and the numerical solution of the model is established by using the finite difference method, in which the permeability coefficient and void ratio are assumed to be functions of stress. Compared with the existing models and indoor experimental data, the reliability of this research model is verified. The results show that the new model can more accurately simulate the consolidation process of aquitard induced by the instantaneous drawdown of water level. The consolidation model considering the moving non-Darcy flow interface delays the dissipation process of excess pore water pressure, but does not affect the total dissipation and total settlement of pore water pressure. For the consolidation model considering the attenuation of permeability coefficient, the time for the dissipation of pore water pressure and the settlement to reach the stability is obviously prolonged, and the variable permeability coefficient delays the time for the moving interface to reach the stability, causing the stable position of the moving interface to move upward.
- land subsidence,
- aquitard,
- consolidation,
- non-Darcy flow,
- hydrogeology,
- environmental engineering

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References(42)

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Water Release and Consolidation Model of Aquitard Considering Moving Non-Darcy Flow Interface

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