| Autor: |
Zhang, Zhiqiang1 (AUTHOR), Wang, Zijian1 (AUTHOR), Chen, Kunyu1 (AUTHOR), Wang, Sheping2 (AUTHOR), Ding, Yanping3 (AUTHOR), Huang, Yuxiang1 (AUTHOR), Lu, Jinsuo1,4 (AUTHOR) lujinsuo@xauat.edu.cn |
| Předmět: |
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| Zdroj: |
Journal of Hydro-Environment Research. Sep2021, Vol. 38, p44-52. 9p. |
| Abstrakt: |
[Display omitted] • A novel anti-seepage method used LID constructions in an area of collapsible loess was proposed. • The performance of the VSSL was investigated with infiltration experiments and HYDRUS-2D software. • The HYDRUS-2D software could accurately describe the hydraulic behavior of the VSSL system. • The VSSL exhibited a significant anti-permeate and directed penetration capacity. The use of a sunken lawn is an emerging Low Impact Development (LID) technique to effectively control storm runoffs. However, the random infiltration of rainwater that occurs due to the construction of a sunken lawn in an area of collapsible loess seriously threatens the safety of buildings around it. Setting up a vertical soil sand layer (VSSL) structure next to a sunken lawn as an anti-permeate method has been proposed in this study. To analyze the lateral anti-seepage effects of a VSSL, a sunken lawn model around a building was established based on soil physical parameters, and water seepage in the sunken lawn was investigated using a infiltration experiment and HYDRUS-2D software. The results show that the anti-seepage effects of a VSSL can significantly reduce the average wetting front migration length and water content at the observation points behind the sand layer. The Nash-Sutcliff Efficiency (NSE) index was used to evaluate the accuracy and reliability of the HYDRUS-2D model. The values of the NSE index obtained were greater than 0.82 (varied between 0.82 and 0.98) which confirmed the applicability of the HYDRUS-2D software in accurately describing the hydraulic behavior of the lateral anti-seepage effects of the VSSL in a sunken lawn. Simulation infiltration tests showed that, on the side of the VSSL, the wetting front migration length was reduced by 55.5% on average, and the water content of the observation points behind the sand layer was reduced by 40.5%, increasing the stability of the loess around the building infrastructure. The results are of value in practical applications, such as for devising engineering or non-engineering measures to avoid loess collapsibility around sunken lawns. [ABSTRACT FROM AUTHOR] |
| Databáze: |
GreenFILE |
| Externí odkaz: |
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