水力发电2026，Vol.52Issue(10)：44-53,85,11.
土工膜缺陷条件下渠道边坡渗流响应与稳定性分析
Seepage Response and Stability Analysis of Canal Slopes under Geomembrane Defect Conditions
摘要
Abstract
Geomembranes are widely used in canal lining anti-seepage systems,and their defects can alter canal seepage characteristics and further affect slope stability.Taking the power canal of HLJ Hydropower Station as the study object,a coupled seepage-stability analysis model for canal slopes is established based on field investigation and numerical simulation,to investigate the effects of geomembrane defect elevation,defect size,drawdown duration and foundation soil permeability on the seepage field and slope stability of the canal.The results show that:(a)under a constant normal operating water depth,the elevation of defect plays a dominant role in controlling the seepage field,and the defects closer to the canal bottom are more likely to induce concentrated leakage;(b)during water-level drawdown,the pore-water pressure and the phreatic line exhibit a pronounced lagged response to the changes in canal water level;and(c)the relative importance of the factors affecting slope stability follows the order of defect elevation>drawdown duration>foundation soil permeability>defect size.These results can provide a reference for defect identification,operation management,and stability assessment of canal anti-seepage systems.关键词
土工膜缺陷/渠道边坡/渗流场/水位下降/边坡稳定/敏感性分析Key words
geomembrane defect/canal slope/seepage field/water-level drawdown/slope stability/sensitivity analysis分类
建筑与水利引用本文复制引用
严天宇,任建江,柳松竹,严新军..土工膜缺陷条件下渠道边坡渗流响应与稳定性分析[J].水力发电,2026,52(10):44-53,85,11.基金项目
国家自然科学基金项目(52469005) （52469005）
新疆伊犁特克斯河水电开发有限公司特克斯分公司科创项目(HJDZ-Y32042410) （HJDZ-Y32042410）
2024年研究生"新疆水利工程安全与水灾害防治重点实验室"课题项目(ZDSYS-YJS-2024-39) （ZDSYS-YJS-2024-39）
