摘要
在我国水利工程建设中,大坝反滤层厚度基本都是采用经验法确定,缺乏定量化的确定依据。笔者依托实际工程,在渗流控制方程理论研究的基础上,通过有限元数值分析计算,得到反滤层下游侧浸润线位置与反滤层厚度的关系曲线,再通过曲线的曲率变化来确定经济合理的反滤层厚度。研究结果表明,将反滤层的厚度确定在该曲线由陡变缓的转折点处是合适的,物理模型试验研究也验证了该结果的合理性。该方法为类似工程确定反滤层的厚度提供了新的思路及参考。
In the construction of water cnservancy projects in China,the thickness of dam reversed filter is basically determined by empirical method,which lacks the basis for quantitative determination.Based on the actual project and the theoretical study of seepage control equation,the relationship curve between the line of saturation position of the downstream side of the reversed filter and the thickness of the reversed filter is obtained by finite element numerical analysis and calculation,and then the economic and reasonable thickness of the reversed filter is determined by the curvature change of the curve.The results show that it is appropriate to determine the thickness of the reversed filter at the turning point of the curve from steep to slow,and the physical model test also verifies the rationality of the results.This method provides a new idea and reference for determining the thickness of the reversed filter in similar projects.
作者
张兴凯
石建勋
张正
马涛
梁继宗
张会梅
ZHANG Xingkai;SHI Jianxun;ZHANG Zheng;MA Tao;LIANG Jizong;ZHANG Huimei(Ningxia Water Conservancy and Hydropower Engineering Bureau Co.,Ltd.,Yinchuan 750004,China;College of Civil Engineering,Northwest Minzu University,Lanzhou 730024,China)
出处
《红水河》
2022年第1期5-9,28,共6页
Hongshui River
基金
甘肃省自然科学基金项目(21JR7RA166)
宁夏水利水电工程局有限公司基金项目(NGJKY005)。
关键词
大坝
反滤层
厚度
浸润线
渗流
模型试验
dam
reversed filter
thickness
line of saturation
seepage flow
model test
