岩土工程学报2026，Vol.48Issue(9)：1837-1847,11.DOI:10.11779/CJGE20250549
基于μCT三维重建与渗流模拟的风化砂岩孔隙演化特征研究
Study on pore evolution characteristics of weathered sandstone based on μCT 3D reconstruction and seepage simulation
摘要
Abstract
Weathering modifies the microscopic pore architecture of sandstone through coupled physical,chemical,and biological processes,thereby exerting a primary control on permeability and associated mechanical behavior.In this study,high-resolution three-dimensional images are acquired by micron-scale X-ray computed tomography(μCT),and the pore structures of sandstones with different weathering degrees are reconstructed using AVIZO.Digital core models are then implemented in COMSOL Multiphysics to perform seepage simulations.The results indicate that increasing weathering leads to systematic increases in porosity,pore-throat radius,and connectivity,accompanied by a more complex pore network and better-developed flow pathways.Consequently,the simulated absolute permeability increases markedly and is consistent in order of magnitude with laboratory confining-pressure seepage test results.Pore-network analysis further shows that highly weathered sandstones exhibit a higher proportion of high-velocity throats,demonstrating that pore enlargement and enhanced connectivity are the dominant mechanisms responsible for the permeability enhancement during weathering.These findings provide a quantitative basis for interpreting seepage mechanisms in weathered sandstones and for predicting their hydraulic performance in engineering applications.关键词
砂岩/风化作用/微计算机断层扫描技术/三维重建/渗流模拟Key words
sandstone/weathering/micro-scale X-ray computed tomography(μCT)/3D reconstruction/seepage simulation分类
建筑与水利引用本文复制引用
邹育麟,乔江美,杨元杰,华熹,童玉雯,寿云东,张梓煜..基于μCT三维重建与渗流模拟的风化砂岩孔隙演化特征研究[J].岩土工程学报,2026,48(9):1837-1847,11.基金项目
四川省交通运输科技项目(2018-ZL-09) （2018-ZL-09）
深圳市科技基础研究专项-自然科学基金项目(JCYJ20230807090102006) （JCYJ20230807090102006）
广东省基础与应用基础研究基金项目(2024A1515011772)This work was supported by Sichuan Provincial Transportation Science and Technology Project(Grant No.2018-ZL-09) （2024A1515011772）
Shenzhen Science and Technology Innovation Program(Grant No.JCYJ20230807090102006) （Grant No.JCYJ20230807090102006）
Guangdong Basic and Applied Basic Research Foundation(Grant No.2024A1515011772). （Grant No.2024A1515011772）
