地下水在弱膨胀性土边坡稳定中的影响
摘要:地下水是影响边坡稳定一个重要因素,主要体现为内、外两个方面的影响。经常考虑的地下水对边坡地层重度、强度等方面的影响属于内的方面;地下水还可能对边坡岩土体产生如浮托力、静水压力、动水压力、渗透力等附加力属于外的方面。通过对一弱膨胀性土边坡失稳各阶段、各影响因素下的分析,阐述了地下水在弱膨胀性土边坡稳定分析中内、外方面的不利影响。并得出结论:在边坡稳定分析时,仅考虑地下水对地层重度、抗剪强度等指标的影响,其分析结果偏于不安全;尤其是边坡地层为弱膨胀性土时,浸水后强度大幅下降,应采用浸水试验指标进行边坡稳定性复核;其次还应考虑地下水渗流排泄对边坡产生的附加荷载。
Abstract:The groundwater is an important factor for the slope stability; the influence includes the intrinsic factor and the extrinsic factor. Generally speaking, the affect of intrinsic factor includes the gravity density and strength of the soil layer in the slope. Groundwater also may produce another additional force in slope soil, such as Buoyancy pressure, Hydrostatic Pressure, Hydrodynamic pressure, Penetration and so on, which are the extrinsic factor. Based on the study of every instability stage and every influence factor of a slightly-expansive soil slope, the conclusions are shown as below. The result is unsafe for the slope stability, if the analysis only includes the influences of groundwater on weight density of soil and shear strength. Especially, when the slope soil is a slightly-expansive soil, its strength will be reduced if it is wet. It should use the index of Water Immersion Test to check the stability of the slope, and the additional load should be considered, which is generated by the seep of groundwater.
中文标题：
地下水在弱膨胀性土边坡稳定中的影响
Research on the Affect of Groundwater on the Stability of the Slightly-expansive Soil Slope
作者：
董柱,毛勇,赖正发
DONG Zhu,MAO Yong,LAI Zhengfa
作者简介:董柱,1975年生,男,汉族,云南个旧人,1996年毕业于东南大学土木工程系,高级工程师,一级注册结构师,注册土木(岩土)工程师,主要从事岩土工程的研究与设计工作。E-mail:d-z1001@163.com
通讯地址：
中国有色金属工业昆明勘察设计研究院, 云南昆明 650051
KunmingProspectingDesignInstituteofChinaNonferrousMetalsIndustry,Kunming650051Yannan,China
中图分类号:TU441.35
doi:10.3969/j.issn.1007-2993.2010.05.004
出版物：岩土工程技术
收稿日期:2010-06-04
网络出版日期:2021-07-06
关键词:边坡稳定,地下水,弱膨胀性土,内、外影响,附加荷载,渗透力
Key words:slope stability,groundwater,slightly-expansive soil,intrinsic factor and extrinsic factor,additional load,Penetrati
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