何一洋,黄耀英,费大伟,高大水,杨明化

• 1:三峡大学水利与环境学院
• 2:安徽绩溪抽水蓄能有限公司
• 3:长江勘测规划设计研究有限责任公司

摘要(Abstract)：

针对室内土工膜老化试验和现场土工膜性能检测难以反映实际工程复合土工膜整体时变性态的问题，结合王甫洲水利工程围堤土石坝典型监测断面近20 a渗流监测资料对复合土工膜时变特性进行研究。首先按照复合土工膜的服役年限对防渗断面实测渗流资料进行时间分段；然后采用“正交设计-数值计算-支持向量机-粒子群优化算法”相结合的方法，逐一反演得到不同时间段内土工膜的渗透系数；最后建立土工膜渗透系数时变效应模型并分析了土工膜渗透系数的时变特性。结果显示：土工膜渗透系数时变效应模型与反演获得的土工膜渗透系数平均误差为8.39%,可较好地反映土工膜渗透系数的时变规律；反演获得的复合土工膜渗透系数从运行初期的1.00×10~(-11) cm/s增长到了1.50×10~(-10) cm/s,增长速率逐渐减小，表明目前复合土工膜渗透系数变化处于相对稳定状态。

关键词(KeyWords)： 复合土工膜;渗透系数;测压管水位;时变特性;参数反演

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2018YFC0407104);; 国家自然科学基金资助项目(51779130,52179135)

作者(Author): 何一洋,黄耀英,费大伟,高大水,杨明化

DOI: 10.13928/j.cnki.wrahe.2022.08.011

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