2024年 05期

Numerical Simulation of Prevention and Control of Seawater Intrusion by Underground Dams


摘要(Abstract):

针对不同类型地下坝的咸水运移规律缺乏系统研究的问题,利用海水入侵数值模型SEAWAT建立二维变密度流模型,探讨悬浮式、溢流式、全封式地下坝的水平建设位置和建设深度对海水入侵的防治效果。结果表明,悬浮式、溢流式、全封式地下坝都可以减小海水入侵范围和程度,地下坝的水平建设位置应尽可能的靠近海边界;综合考虑地下坝工程效果和环境效能,当地下坝水平建设距离为20 cm、悬浮式地下坝建设深度的变化量为0.875时渗流量减少60.8%,地下坝建设深度建议为含水层厚度的80%左右;溢流式地下坝建设深度的变化量为0.325时,海水入侵的距离急剧减小,地下坝建设高度建议采用最小有效坝高,渗透系数越小,水平建设距离越大,水头差越大,则最小有效坝高越小。

关键词(KeyWords): 海水入侵;地下坝;渗透系数;水头差;数值模拟

基金项目(Foundation): 国家自然科学基金项目(42007153);; 山东省自然科学基金项目(ZR2021MD086,ZR2021ME145)

作者(Author): 宁彩艳,徐立荣,李倩,徐晶,陈学群

DOI: 10.13349/j.cnki.jdxbn.20240527.001

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