哈尔滨工程大学学报2025，Vol.46Issue(4)：710-719,10.DOI:10.11990/jheu.202303024
地下水位变动下抗滑桩加固土坡稳定性上限分析
Upper limit analysis of the stability of soil slopes reinforced by anti-slide piles under groundwater level fluctuations
摘要
Abstract
In view of the importance of suction effect in the unsaturated zone of slopes,this paper introduces suction into the upper bound limit analysis method to construct an energy balance equation.Combining with the strength re-duction method,a logarithmic spiral failure mechanism is adopted to propose a method for evaluating the stability of anti-slide pile-reinforced partially saturated soil slopes under sudden drop in groundwater level,i.e.,solving the anti-sliding force of anti-slide piles.The rationality of the method is verified through comparison with existing litera-ture results,and the effects of matric suction,groundwater level,shear strength model,and soil type on the anti-sliding force of anti-slide piles are discussed.The results show that the presence of matric suction does not affect the effective reinforcement position of anti-slide piles.The anti-sliding force of anti-slide piles decreases with the abrupt decline of groundwater level,and the greater the matric suction and its associated friction angle,the more significant the suction reduction effect on the anti-sliding force.The selection of different soil types and shear strength models affects the anti-sliding force of anti-slide piles,especially for clay and extremely fine-grained soils.It is recommended to determine appropriate shear strength models based on soil types during analysis.The research results have important practical guiding significance for the design of anti-slide piles.关键词
边坡/抗滑桩/稳定性/部分饱和土/地下水位变动/基质吸力/抗剪强度模型/上限定理Key words
slope/anti-sliding pile/stability/partially saturated soils/water level fluctuation/matric suction/shear strength models/upper limit theorem分类
建筑与水利引用本文复制引用
邓波,肖育奇,杨明辉,王东星..地下水位变动下抗滑桩加固土坡稳定性上限分析[J].哈尔滨工程大学学报,2025,46(4):710-719,10.基金项目
国家自然科学基金项目(52308356,52079098) （52308356,52079098）
湖南省自然科学基金面上项目(2024JJ5334) （2024JJ5334）
湖南省普通高等学校教学改革研究项目(HNJG-2021-0622). （HNJG-2021-0622）
