An approach for comparing agricultural development to societal visions.
An approach for comparing agricultural development to societal visions.
复制标题
将农业发展与社会愿景进行比较的方法。
DOI：
10.1007/978-3-319-99423-9_5
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发表时间：
2022
影响因子：
7.3
通讯作者：
Helfenstein J
中科院分区：
文献类型：
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作者：
Helfenstein J
渗流引起土壤内部侵蚀的可能性取决于几何和流体力学标准的组合，而土壤所受的复杂应力状态是决定因素之一。这项初步研究在小型实验室条件下，研究了复杂应力状态下的渗流对间隙级配土的特性的影响，包括体积、渗透性、应力-应变响应和颗粒分布的变化。这项研究使用了应力路径三轴渗透仪，能够评估在复杂的三轴应力状态下通过向下渗流进行内部侵蚀的间隙级配土壤。恒应力条件下渗流试验的初步分析结果表明，细粒的侵蚀降低了缝隙级配试件的渗透性，也可能降低其抗剪强度。文中还讨论了本研究的局限性和未来的计划。
The potential for seepage induced internal erosion in a soil depends on a combination of both geometric and hydromechanical criteria, with the complex stress states that the soil is subject to being one of the determinant factors. This preliminary study investigates under small-scale laboratory conditions, the influence of seepage flow under complex stress states on the behaviour of a gap-graded soil including change in volume, permeability, stress-strain response and particle size distribution. The study uses a stress path triaxial permeameter capable of assessing gap-graded soils under complex triaxial stress states undergoing internal erosion via downward seepage. The results obtained from the preliminary analysis of seepage flow testing under constant stress condition indicate that erosion of fines reduces the permeability of gap-graded samples and may also reduce its shear strength. Limitations of this research and future plans are also discussed.