当前位置：
X-MOL 学术
›
Hydrol. Process.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Experimental investigation of internal erosion behaviours in inclined seepage flow
Hydrological Processes ( IF 2.8 ) Pub Date : 2020-10-15 , DOI: 10.1002/hyp.13944 Yue Liang 1, 2 , Tian‐Chyi J. Yeh 3, 4 , Chen Ma 1 , Qiang Zhang 5 , Dehong Yang 2 , Yonghong Hao 3
Hydrological Processes ( IF 2.8 ) Pub Date : 2020-10-15 , DOI: 10.1002/hyp.13944 Yue Liang 1, 2 , Tian‐Chyi J. Yeh 3, 4 , Chen Ma 1 , Qiang Zhang 5 , Dehong Yang 2 , Yonghong Hao 3
Affiliation
|
Internal erosion is one of the most common causes of failure in hydraulic engineering structures, such as embankments and levees. It also plays a vital role in the geohazards (such as landslides and sinkhole developments) and more importantly, the earth landscape evolution, which has a broad environmental and ecosystem impacts. The groundwater seepage is multi‐directional, and its multi‐dimensional nature could affect the initiation and the progression of internal erosion. With a newly developed apparatus, we carry out nine internal erosion experiments under five different seepage directions. The results reveal that the critical hydraulic gradient increases as the seepage direction varies from the horizontal to the vertical. After a global erosion is triggered, preferential erosion paths distribute randomly from the bottom to the top of the specimen. If the seepage direction is not vertical, small preferential erosion paths merge into a large erosion corridor, in which the loss of fine particles is significant but negligible outside. Results of experiments manifest that the erosion is heterogeneous and three‐dimensional, even in the unidirectional seepage flow. The particles are rapidly eroded at the early stage of the erosion, indicating a high erosion rate. With the erosion time increasing, the particle loss slows down and even ceases if the time is long enough. The erosion rate increases if the seepage direction approaches a vertical direction. Overall, the erosion rate approximately decreases with erosion time exponentially. We proposed exponential equations to illustrate the variation of the erosion rate in the erosion process.
中文翻译：
倾斜渗流内部侵蚀行为的实验研究
内部侵蚀是水利工程结构（例如路堤和堤防）中最常见的破坏原因之一。它还在地质灾害（例如滑坡和塌陷发展）中，尤其是在地球景观演变中具有至关重要的作用，这对环境和生态系统具有广泛的影响。地下水渗流是多方向的，其多维性质可能影响内部侵蚀的发生和发展。使用新开发的仪器，我们在五个不同的渗流方向上进行了九次内部腐蚀实验。结果表明，随着渗流方向从水平向垂直方向变化，临界水力梯度增大。引发全球侵蚀之后，优先腐蚀路径从试样的底部到顶部随机分布。如果渗流方向不垂直，则较小的优先侵蚀路径会合并成较大的侵蚀通道，在该通道中，细颗粒的损失很大，但外部可以忽略不计。实验结果表明，即使在单向渗流中，侵蚀也是非均质的和三维的。颗粒在侵蚀的早期迅速被侵蚀，表明侵蚀速率很高。随着侵蚀时间的增加，如果时间足够长，颗粒损失会减慢甚至停止。如果渗流方向接近垂直方向，则腐蚀速率增加。总体而言，腐蚀速率随腐蚀时间呈指数下降。
更新日期：2020-11-09
中文翻译：
倾斜渗流内部侵蚀行为的实验研究
内部侵蚀是水利工程结构（例如路堤和堤防）中最常见的破坏原因之一。它还在地质灾害（例如滑坡和塌陷发展）中，尤其是在地球景观演变中具有至关重要的作用，这对环境和生态系统具有广泛的影响。地下水渗流是多方向的，其多维性质可能影响内部侵蚀的发生和发展。使用新开发的仪器，我们在五个不同的渗流方向上进行了九次内部腐蚀实验。结果表明，随着渗流方向从水平向垂直方向变化，临界水力梯度增大。引发全球侵蚀之后，优先腐蚀路径从试样的底部到顶部随机分布。如果渗流方向不垂直，则较小的优先侵蚀路径会合并成较大的侵蚀通道，在该通道中，细颗粒的损失很大，但外部可以忽略不计。实验结果表明，即使在单向渗流中，侵蚀也是非均质的和三维的。颗粒在侵蚀的早期迅速被侵蚀，表明侵蚀速率很高。随着侵蚀时间的增加，如果时间足够长，颗粒损失会减慢甚至停止。如果渗流方向接近垂直方向，则腐蚀速率增加。总体而言，腐蚀速率随腐蚀时间呈指数下降。
京公网安备 11010802027423号