Hydraulic conductivity of sand influenced by temperature and porosity in centrifugal tests  

作　　者：Jianjian HE Xihao JIANG Yubing WANG 

机构地区：[1]Center for Hypergravity Experiment and Interdisciplinary Research,College of Civil Engineering and Architecture,Zhejiang University,Hangzhou,310058,China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2025年第3期177-193,共17页浙江大学学报(英文版)A辑(应用物理与工程)

基　　金：supported by the Basic Science Center Program for Multiphase Media Evolution in Hypergravity of the National Natural Science Foundation of China(No.51988101)。

摘　　要：This study focused on the hydraulic conductivity of sand in centrifuge modeling.A self-designed temperature-controlled falling-head permeameter apparatus was used,and a series of falling-head seepage tests were performed on sand samples with various porosities at different temperatures and centrifugal accelerations.The objectives were to qualitatively and quantitatively investigate the effects of temperature,porosity,and centrifugal acceleration on the hydraulic conductivity of sand and to study the applicability of the Kozeny-Carman equation for the centrifugal environment.Test results showed that in a similar temperature range and under the same porosity,the hydraulic conductivity of the sand is linearly correlated with centrifugal acceleration.When subjected to the same centrifugal acceleration and in a similar temperature range,the hydraulic conductivity of the sand exhibits an almost linear increase in relation to its porosity function(s^(3)/(1−s)^(2));the functional relationships between the hydraulic conductivity of the sand and temperature,centrifugal acceleration level,and porosity were established using two pathways.When the centrifugal acceleration is less than 50g,the Kozeny-Carman equation is effectively accurate in predicting the hydraulic conductivity of sand;however,when the centrifugal acceleration exceeds 50g,it is important to consider a significant error.

关 键 词：Hydraulic conductivity of sand TEMPERATURE POROSITY Centrifugal acceleration Kozeny-Carman equation 

分 类 号：TU411[建筑科学—岩土工程]