科技创新与应用2024，Vol.14Issue(17)：76-81,6.DOI:10.19981/j.CN23-1581/G3.2024.17.018
考虑土石坝坝基接触带性能演化的渗流稳定分析
摘要
Abstract
In order to analyze the performance and variation law of dam foundation contact zone of earth-rockfill dam under the long-term action of seepage and deformation,based on the analysis method of hydraulic coupling,based on the permeability coefficient of dam foundation and dam foundation contact zone obtained in different periods of a reservoir project,the evolution model of permeability and mechanical parameters of earth-rockfill dam foundation contact zone is established,and the evolution law of physical and mechanical properties and permeability characteristics of dam body and dam foundation materials are grasped.The seepage field and stress field of the reservoir under the condition of normal water level for a long time are analyzed.The study shows that due to the long-term seepage of water flow,the soil in the contact zone of the dam foundation is lost,and the permeability coefficient increases,which leads to the increase of leakage through the dam slope and the mountains on both sides.Considering the influence of hydraulic coupling on the deformation and stability of the dam,it is found that during the operation of the reservoir,the strength of the contact zone of the dam foundation decreases,the yield zone of the contact zone increases,the deformation increases,and the safety factor decreases with the increase of running time.关键词
土石坝/坝基接触带/渗透性能/演化模型/水力耦合Key words
Earth-rockfill dam/dam foundation contact zone/permeability/evolution model/hydraulic coupling分类
建筑与水利引用本文复制引用
刘妍,李毅..考虑土石坝坝基接触带性能演化的渗流稳定分析[J].科技创新与应用,2024,14(17):76-81,6.基金项目
2020年湖南省职业院校教育教学改革研究项目(ZJGB2020189) （ZJGB2020189）
