Spatial distribution and influencing factors of mountainous geological disasters in southwest China: A fine-scale multi-type assessment

Shu, Bo; Chen, Yang; Amani-Beni, Majid; Zhang, Ruizhi

doi:10.3389/fenvs.2022.1049333

Cited by 4 publications

(1 citation statement)

References 72 publications

(85 reference statements)

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“…With global population growth and economic development, groundwater pollution and geological disasters induced by human activities are becoming increasingly serious, threatening the sustainable development of human society (Gorelick and Zheng, 2015;Jia et al, 2020;Luo et al, 2020;Shu et al, 2022;Zhang et al, 2023). Clayey soils widely cover the surface of basins, plains, seabed, and groundwater aquifer systems, such as the Yangtze Delta in China and the Virginia coastal plain aquifer system in the U.S. (Konikow and Neuzil, 2007;Guo and Li, 2015).…”

Section: Introductionmentioning

confidence: 99%

Determination of hydraulic parameters of non-linear consolidation clay layers by type curve method

Wang

Li²,

Xu³

et al. 2023

Front. Earth Sci.

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The consolidation of clay layers is of great significance for groundwater environmental protection, groundwater storage utilization, and land subsidence. In this study, the governing equation for the excess pore water pressure during the non-linear consolidation process of clay layers under load conditions is obtained based on the one-dimensional non-linear consolidation theory. Analytical solutions are then derived for clay layers with single or double drainage caused by the dissipation of the excess pore water pressure. With these analytical solutions, the groundwater dynamics and deformation of the clay layer are analyzed. Correspondingly, a type curve method is proposed to calculate the hydraulic parameters of the clay layer through laboratory experiments, which verifies the reliability of the analytical solutions. The study results show that the deformation of the clay layer predicted by the non-linear consolidation theory is smaller than that predicted by the linear consolidation theory. The deformation of the clay layer increases with the increase in the thickness of the clay layer, the compressive index, and the overburden load, while it decreases with the increase in the initial void ratio and the initial effective stress. The stable time, at which the consolidation of the clay layer is completed, increases with the increase in the compression index and the thickness of the clay layer, while it decreases with the increase in the initial void ratio, the initial effective stress, and the initial hydraulic conductivity. It does not vary with the load pressure. Conclusively, the deformation prediction based on the non-linear consolidation theory is more accurate and applicable to further load pressures.

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