暴雨作用下土质边坡侵蚀破坏的研究——室内试验及边坡破坏的改进 GA 模型

Erosion Failure of a Soil Slope by Heavy Rain: Laboratory Investigation and Modified GA Model of Soil Slope Failure.

机构信息

School of Safety Engineering, Chongqing University of Science and Technology, Chongqing 401331, China.

School of Civil Engineering, University of Queensland, Brisbane QLD 4072, Australia.

出版信息

Int J Environ Res Public Health. 2019 Mar 26;16(6):1075. doi: 10.3390/ijerph16061075.

DOI:10.3390/ijerph16061075

PMID:30917516

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6466615/

Abstract

Rainfall has been identified as one of the main causes for slope failures in areas where high annual rainfall is experienced. The slope angle is important for its stability during rainfall. This paper aimed to determine the impact of the angle of soil slope on the migration of wetting front in rainfall. The results proved that under the same rainfall condition, more runoff was generated with the increase of slope angle, which resulted in more serious erosion of the soil and the ascent of wetting front. A modified Green-Ampt (GA) model of wetting front was also proposed considering the seepage in the saturated zone and the slope angle. These findings will provide insights into the rainfall-induced failure of soil slopes in terms of angle.

摘要

降雨已被确定为高年降雨量地区边坡失稳的主要原因之一。边坡角度对于降雨时的稳定性很重要。本文旨在确定土壤边坡角度对降雨时湿锋运移的影响。结果表明，在相同降雨条件下，随着边坡角度的增加，产生的径流量更大，导致土壤侵蚀更严重，湿锋上升。还提出了一个改进的 Green-Ampt（GA）湿锋模型，考虑了饱和区和边坡角度的渗流。这些发现将为从角度方面了解降雨诱发的土壤边坡失稳提供帮助。