考虑渗透系数空间变异性的堤防工程渗流分析
Dike Seepage Analysis Considering Spatial Variability of Hydraulic Conductivity
庞锐 1徐明洋 2柴伊豪 2周扬1
作者信息
- 1. 大连理工大学水利工程学院,辽宁 大连 116024;大连理工大学海岸与近海工程国家重点实验室,辽宁 大连 116024
- 2. 大连理工大学水利工程学院,辽宁 大连 116024
- 折叠
摘要
水力参数的空间变异性对堤防的渗流状态有明显影响,对其进行量化分析可为堤防的安全运行提供保障.为此,基于随机场理论建立了非侵入式随机渗流分析框架,研究了复杂堤防在不同随机场参数下堤防内水力坡降、渗流量等渗流控制指标的变化规律.结果表明,变异系数每增大 0.2,堤防内粘土的水力坡降最大值增加 20.4%,中砂则增加 60.5%,水力参数空间变异性的影响不可忽视.此外,同时考虑堤防内所有材料的随机渗流特性与仅考虑粘土随机渗流特性相比,粘土内最大水力坡降和流量存在较小波动,这意味着粘土作为主要防渗材料,其渗流安全主要受自身材料属性的影响.
Abstract
The spatial variability of hydraulic parameters has a significant impact on the seepage conditions of dike,and quantitative analysis can provide guarantee for their safe operation.In this study,a non-intrusive random seepage a-nalysis framework was developed based on the theory of random fields.The study investigated the variation patterns of seepage control index,such as hydraulic gradient and seepage discharge,in complex dike under different random field pa-rameters.The results revealed that for every 0.2 increase in the coefficient of variation,the maximum value of hydraulic gradient in clay within the dike increased by 20.4%,while in medium sand,it increased by 60.5%.The influence of spa-tial variability of hydraulic parameters cannot be ignored.Furthermore,when considering the random seepage character-istics of all materials within the dike simultaneously compared to considering the random seepage characteristics of a sin-gle material only,there are small fluctuations in the maximum hydraulic gradient and flow within the clay,which imply that as the primary impermeable material,the seepage safety of clay is mainly influenced by its own material properties.
关键词
堤防/渗透系数/渗流指标/空间变异性/非侵入式随机渗流Key words
dike/hydraulic conductivity/seepage index/spatial variability/non-intrusive random seepage引用本文复制引用
基金项目
国家自然科学基金项目(52279125)
国家自然科学基金项目(52279096)
国家自然科学基金项目(52009017)
出版年
2024
NETL
NSTL
万方数据