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降雨入渗对建宁县某边坡稳定性影响研究

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降雨入渗对边坡稳定性有重要影响,文中以建宁县某工程边坡为例,研究4种不同降雨工况下,持续降雨时间和降雨停止后边坡内部的孔隙水压力、地下水位和边坡安全系数的变化规律.研究结果表明,持续的降雨入渗会使边坡内的孔隙水压力升高,地下水位上升,安全系数降低,总体表现为降雨初期安全系数急剧降低,随着降雨的持续,安全系数逐渐趋于一个稳定值,且降雨强度越大,初期安全系数降低的越快,地下水位上升的越快,稳定后的安全系数越小.降雨停止后,积聚在坡体内的水会继续排出,边坡的安全系数会随着雨水的排出逐渐升高,降雨强度越大,降雨停止后,安全系数恢复的越快.研究成果可对建宁县的具体边坡在降雨入渗作用下的稳定性进行全面评价,也可为降雨工况下类似工程的稳定性分析提供参考.
INFLUENCE OF RAINFALL INFILTRATION ON THE STABILITY OF A SLOPE IN JIANNING COUNTY
Rainfall infiltration has an important impact on slope stability.In this paper,a project slope in Jianning County is taken to study the changes of pore water pressure,groundwater level,and slope safety factor in the continu-ous rainfall time and after the rainfall stopped under four different rainfall conditions.The results show that continu-ous rainfall infiltration leads to the increase of the pore water pressure in the slope,the increase the groundwater lev-el,and the reduction the slope safety factor,in which the safety factor in the early period of rainfall decreases sharp-ly.With the continuous rainfall,the safety factor gradually tends to a stable value,and the greater the rainfall intensi-ty,the faster the initial safety factor decreases;the faster the groundwater level rises,and the smaller the safety factor after stability.After the rain stops,the water accumulated in the slope continues to discharge,and the safety factor of the slope gradually increases.The greater the rainfall intensity,the faster the safety factor recovers after the rain stops.The results may comprehensively evaluate the stability of specific slopes in Jianning County under rainfall in-filtration,and can also provide the reference for the stability analysis of similar projects under rainfall conditions.

rainfall infiltrationslope stabilitydurationsafety factor

陈志敏、陶小飞、许传贝、陈滢、赵玉凯

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华东勘测设计院(福建)有限公司,福州 350000

浙江华东工程建设管理有限公司,杭州 310000

中国电建集团华东勘测设计研究院有限公司,杭州 311122

华北水利水电大学,郑州 450046

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降雨入渗 边坡稳定性 持续时间 安全系数

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(1)
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