降雨和蒸发干湿循环对边坡稳定性的影响

IF 2.1 4区地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES

Advances in Meteorology Pub Date : 2022-07-09 DOI:10.1155/2022/5775424

Ya Zhao

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引用次数: 1

摘要

降雨蒸发过程产生的干湿循环效应引起的土体强度衰减和土体入渗特性变化是诱发边坡失稳的重要因素。如何考虑土体强度衰减和水土特征曲线滞后效应对边坡瞬态稳定变化的影响是解决这一问题的关键。本文基于Geo-Studio进行了考虑土体强度衰减和水土特征曲线滞后的边坡瞬态稳定分析。研究结果表明:降雨-蒸发干湿循环过程引起的边坡瞬态安全系数变化总体呈减小趋势，安全系数较初始状态下降43%;降雨-蒸发干湿循环渗流特征具有一定的规律性。坡面测点位置对孔隙压力变化幅度的影响较大:坡脚>坡中部>坡顶。同一位置孔隙压力随深度增加的变化存在显著的响应滞后。降雨强度对边坡安全系数的变化有一定影响，但当降雨强度超过一定数量时，其影响不明显。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The Influence of Rainfall and Evaporization Wetting-Drying Cycles on the Slope Stability

The decay of soil strength and the change of soil infiltration characteristics caused by the dry and wet cycle effect generated by the rainfall-evaporation process are important factors that induce slope instability. How to consider the effect of soil strength decay and water-soil characteristic curve hysteresis effect on transient stability change of slope is the key to solve this problem. In this paper, transient stability analysis of slopes considering soil strength decay and water-soil characteristic curve hysteresis is carried out based on Geo-Studio. The results of the study showed that the change of transient safety factor of the slope caused by rainfall-evaporation dry and wet cycle process has an overall decreasing trend and the safety factor decreased by 43% compared to the initial state. The seepage characteristics of the rainfall-evaporation dry-wet cycle have certain regularity. The location of slope measurement points has a greater influence on the magnitude of the pore pressure change: foot of slope > middle of slope > top of slope. Also, there is a significant response hysteresis in the change of pore pressure with increasing depth at the same location. The rainfall intensity has a certain influence on the change of slope safety factor, but its influence is not obvious when the rainfall intensity exceeds a certain amount.

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来源期刊

Advances in Meteorology 地学天文-气象与大气科学

CiteScore

5.30

自引率

3.40%

发文量

审稿时长

>12 weeks

期刊介绍： Advances in Meteorology is a peer-reviewed, Open Access journal that publishes original research articles as well as review articles in all areas of meteorology and climatology. Topics covered include, but are not limited to, forecasting techniques and applications, meteorological modeling, data analysis, atmospheric chemistry and physics, climate change, satellite meteorology, marine meteorology, and forest meteorology.