不同降雨模式下孔隙气压力对边坡稳定的影响

大坝与安全 ›› 2025 ›› Issue (3): 43-.

不同降雨模式下孔隙气压力对边坡稳定的影响

王蒙蒙¹，程庆超^2,3

1.浙江建工水利水电建设有限公司，浙江杭州，310012；2.杭州国电大坝安全工程有限公司，浙江杭州，310014；3.浙江华东岩土勘察设计研究院有限公司，浙江杭州，310014

收稿日期:2023-06-11 出版日期:2025-06-30 发布日期:2026-01-31
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。

Effect of pore air pressure on slope stability under various rainfall patterns

WANG Mengmeng and CHENG Qingchao

Zhejiang Construction Engineering Water Resources and Hydropower Construction Co., Ltd.

Received:2023-06-11 Online:2025-06-30 Published:2026-01-31

摘要/Abstract

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。

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

Abstract:

Rainfall is the most important factor inducing landslide, and rainfall pattern is the main influence parameter. Based on the theory of water-air two-phase flow, this article takes a landslide as an example 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 weakened 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 rainfall pattern, which can easily lead to the instability of the slope. Thus, the necessary engineering measures should be taken in advance in the event of such rainfall pattern prediction.

Key words:

rainfall pattern, slope stability, pore air pressure, rainfall infiltration, water-air two-phase flow

中图分类号:

TV223

王蒙蒙, 程庆超.

不同降雨模式下孔隙气压力对边坡稳定的影响

[J]. 大坝与安全, 2025, 0(3): 43-.

WANG Mengmeng and CHENG Qingchao.

Effect of pore air pressure on slope stability under various rainfall patterns

[J]. Dam & Safety, 2025, 0(3): 43-.

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