西北水电Issue(2)：94-106,13.DOI:10.3969/j.issn.1006-2610.2025.02.014
古河槽深厚覆盖层渗流-潜蚀耦合试验及3D数值模拟研究
Experimental and 3D Numerical Simulation Study on the Coupling of Seepage and Piping in the Thick Overburden Layer of an Ancient River Channel
摘要
Abstract
The problem of seepage and piping in the large amount of accumulated granular materials within the thick overburden layer is very prominent,which severely restricts the site selection,construction,and safe operation of hydropower projects.However,currently,there is insufficient understanding of the evolutionary behavior of seepage and piping in the soil of the overburden layer,and the research on the development mechanism of piping under the condition of local failure of the impervious wall is not sufficient.In order to study the impact of the seepage and piping problems in the soil of the thick overburden layer on practical projects,a hydropower station located in the lower reaches of the Yigong Zangbo River in the Tibet Autonomous Region was taken as the research object.There is a thickly buried pervious layer of glaciofluvial deposits(Qfgl3)on the right bank.The problems of seepage around the dam and piping on the right bank were studied.Based on a self-developed large-scale soil seepage-piping coupling experimental device for the overburden layer,the dy-namic evolution process of the loss of fine particles during the seepage and piping process was revealed,and the constitutive relationship of seepage and piping in the Qfgl3 pervious layer was established.The finite element method was used to analyze the development process of the seepage field,the scope of piping,and the leakage amount under the condition of local defects in the curtain.The research results can provide a reference for the quantitative study of reservoir and dam leakage in the dam site area with a thick overburden layer.关键词
深厚覆盖层/渗流-潜蚀/冰水堆积物/渗漏量Key words
Thick Overburden Layer/Seepage-Piping/Glaciofluvial Deposits/Leakage Amount分类
建筑与水利引用本文复制引用
周伟,王婷,张博,何亚宁,杨莹..古河槽深厚覆盖层渗流-潜蚀耦合试验及3D数值模拟研究[J].西北水电,2025,(2):94-106,13.基金项目
国家自然科学青年基金项目(52309145) （52309145）
国家自然科学基金黄河水科学研究联合基金(U2443230) （U2443230）
陕西省高校科协青年托举项目(20240418) （20240418）
西安市科技计划项目(2023JH-GXRC-0042) （2023JH-GXRC-0042）
