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On-line Access: 2025-03-31
Received: 2024-04-24
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Citations: Bibtex RefMan EndNote GB/T7714
Jianjian HE, Xihao JIANG, Yubing WANG. Hydraulic conductivity of sand influenced by temperature and porosity in centrifugal tests[J]. Journal of Zhejiang University Science A,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.A2400216 @article{title="Hydraulic conductivity of sand influenced by temperature and porosity in centrifugal tests", %0 Journal Article TY - JOUR
离心模型试验中温度及孔隙率对砂土渗透系数的影响研究机构:浙江大学,建筑工程学院,浙江大学超重力研究中心,中国杭州,310058 目的:超重力环境下土体渗透性的准确刻画是利用离心超重力模拟技术解决与渗流相关岩土工程问题的关键。本文旨在定性和定量研究温度、孔隙率和离心加速度对砂土渗透特性的影响,并探讨Kozeny-Carman(KC)方程在超重力环境中的适用性,为更高试验温度、更大离心加速度下砂土渗透系数的预测提供更准确的方法。 创新点:1.利用自研试验装置,定性及定量揭示了温度、孔隙率及离心加速度对砂土渗透系数的影响;2.利用本文建立的砂土渗透系数预测公式,评估了超重力环境下KC公式的适用性。 方法:1.通过自研试验装置(图1),开展超重力温控变水头渗流试验,定性揭示温度、离心加速度及孔隙率对砂土渗透系数的影响(图7和8);2.基于KC公式,通过两种拟合路径,逐步建立砂土渗透系数与温度、离心加速度和孔隙率之间的定量关系(公式(10)和(15));3.在更高试验温度、更大离心加速度下,将KC公式及本文所建立公式的计算结果进行对比,揭示KC公式在超重力环境中的适用性(图13)。 结论:1.在相近温度及相同孔隙率下,砂土渗透系数与离心加速度呈线性相关;在相同离心加速度和相近温度下,砂土渗透系数随孔隙率函数(s3/(1?s)2)几乎呈线性增加。2.通过两种途径获得了砂土渗透系数与温度、离心加速度水平和孔隙率之间的函数关系。3.当离心加速度小于50g时,KC方程可有效准确地预测砂土渗透系数;当离心加速度大于50g时,利用KC方程预测砂土渗透系数会产生显著误差。 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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