河北工业科技2026，Vol.43Issue(4)：340-346,7.DOI:10.7535/hbgykj.2026yx04006
极限分析理论在基坑边坡抗震稳定性分析中的应用
Application of limit analysis theory in seismic stability analysis of foundation pit slope
摘要
Abstract
In order to solve the problem of low accuracy in predicting the instability risk of foundation pit slopes under earthquake action,a seismic stability analysis model was constructed based on limit analysis theory in this study.Firstly,an underground continuous wall enclosure structure was set up and a seismic stability analysis model using MICHALOWSKI/DRESCHER was established.Then,considering different working conditions comprehensively,the cow horn damaged body was inserted into the block as a model,and seismic stability analysis conditions were se.Finally,based on the theory of limit analysis,the virtual power equation was established by calculating the gravity power,seismic force power,and internal energy dissipation rate on the sliding surface,and then the upper limit of the seismic stability coefficient was solved.The results show that when the aspect ratio of the slope from 0.15 increases to 3.56,the seismic stability coefficient drops sharply by 56.1%.The soil displacement caused by vertical upward seismic force is 0.879 8 m,which is 3.3%higher than the downward displacement;The displacement under the combined seismic load is 0.939 0 m,which is a maximum increase of 10.0%compared to a single direction.Compared to the reinforcement density is 0.2,when the reinforcement density is 2.6,the stability coefficient increases by 284%.The proposed model can provide theoretical basis for the design of foundation pit support in high-intensity areas and reduce construction risks.关键词
岩土力学/极限分析理论/基坑边坡/抗震/稳定性分析Key words
geotechnical engineering/limit analysis theory/excavation slope/anti-seismic/stability analysis分类
建筑与水利引用本文复制引用
刘瑞兵,张浩,周坤朋,吴涛,王亚戎..极限分析理论在基坑边坡抗震稳定性分析中的应用[J].河北工业科技,2026,43(4):340-346,7.基金项目
福建省自然科学基金(2023J011133) （2023J011133）
