摘要
降雨是诱发滑坡的最重要因素,其中降雨模式是主要的影响参数。笔者基于水气两相流理论,以某滑坡为例计算模拟三种典型降雨模式下的降雨入渗并进行边坡稳定性分析。结果表明:三种降雨模式下,孔隙气压力对边坡稳定均产生不利影响;坡脚的孔隙气压力变化峰值较坡中部和坡顶的大,并且减弱型降雨模式下孔隙气压力的响应持续时间最长,集中型次之,增强型最短;减弱型降雨模式下孔隙气压力对边坡稳定安全系数的影响幅度最大,极易导致边坡失稳,遇到此种降雨模式预报时,应当提前采取必要的工程处理措施。
Rainfall is the most important factor inducing landslide,and rainfall pattern is the main influ⁃ence parameter.Based on the theory of water-air two-phase flow,this article takes a landslide as an ex⁃ample to calculate and simulate the rainfall infiltration and slope stability under three typical rainfall modes.The results show that the influence of pore air pressure on slope stability is detrimental under the three rainfall patterns.The max value of pore air pressure at the toe of slope is larger than the middle and top of the slope,and the response duration of the pore air pressure is the longest under the weak⁃ened rainfall pattern,the concentrated pattern ranks second,and the enhanced pattern ranks third.The influence of pore air pressure on the safety factor of slope stability is greatest under the weakened rain⁃fall pattern,which can easily lead to the instability of the slope.Thus,the necessary engineering mea⁃sures should be taken in advance in the event of such rainfall pattern prediction.
作者
王蒙蒙
程庆超
WANG Mengmeng;CHENG Qingchao(Zhejiang Construction Engineering Water Resources and Hydropower Construction Co.,Ltd.)
出处
《大坝与安全》
2025年第3期43-47,51,共6页
Dam & Safety
关键词
降雨模式
边坡稳定
孔隙气压力
降雨入渗
水气两相流
rainfallpattern
slopestability
poreairpressure
rainfallinfiltration
water-airtwo-phase flow
作者简介
王蒙蒙(1991-),女,河南开封人,工程师,从事水利工程理论基础研究和技术研发管理工作。作者邮箱:1833752642@qq.com。
