水力发电2024，Vol.50Issue(6)：49-54,6.
水电工程深厚覆盖层地基防渗设计与潜蚀问题
Seepage Control Design and Internal Erosion of Deep Overburden Foundation in Hydropower Projects
孙保平 1刘超 1金伟 2李帅 1王刚3
作者信息
- 1. 水电水利规划设计总院,北京 100120
- 2. 中国电建集团成都勘测设计研究院有限公司,四川 成都 610072
- 3. 重庆大学土木工程学院,重庆 400045
- 折叠
摘要
Abstract
Some hydropower stations in western China are located on ultra-deep overburden,which brings great difficulties to the seepage control.The cut-off wall is the most commonly used measure for seepage control in deep overburden foundation.By reviewing the cases of abnormal leakage through the deep overburden foundation of Luding Hydropower Station,it is pointed out that,for unstable gravel strata widely existing in western rivers,the attention should also be paid to the potential internal erosion risk in the zones of a high flow velocity and high hydraulic gradient within the foundation,while paying attention to the protection of seepage outlets.In order to quantitatively evaluate the internal erosion of sandy gravel foundations and the corresponding consequences,it is necessary to carry out researches on some key technical issues,such as the evaluation criteria for the internal stability of deep overburden,the testing techniques of sandy gravel erosion under high overlying pressure,the numerical simulation method of internal erosion,and the constitutive model for internal erosion.关键词
深厚覆盖层/防渗/潜蚀/渗透破坏/水电工程Key words
deep overburden/seepage control/internal erosion/seepage failure/hydropower project分类
建筑与水利引用本文复制引用
孙保平,刘超,金伟,李帅,王刚..水电工程深厚覆盖层地基防渗设计与潜蚀问题[J].水力发电,2024,50(6):49-54,6.
