基于计算机断层扫描的浆砌石真实三维孔隙网络模型及其渗流数值模拟  

Realistic 3D Pore Network Model of Slurry Masonry and Numerical Simulation of Seepage Based on CT Technology

作　　者：谭彩 潘展钊[1,2] 袁明道 黄锦林[1,2] 史永胜 张旭辉[1,2] TAN Cai;PAN Zhan-zhao;YUAN Ming-dao;HUANG Jin-lin;SHI Yong-sheng;ZHANG Xu-hui(Guangdong Research Institute of Water Resources and Hydropower,Guangzhou 510610,China;State and Local Joint Engineering Laboratory of Estuarine Hydraulic Technology,Guangzhou 510610,China)

机构地区：[1]广东省水利水电科学研究院,广东广州510610 [2]河口水利技术国家地方联合工程实验室,广东广州510610

出　　处：《水电能源科学》2024年第2期89-93,共5页Water Resources and Power

基　　金：广东省水利科技创新项目(2023-02,2020-17);水利部水利技术示范项目(SF-201910)。

摘　　要：为研究浆砌石渗流规律,以广东省某已运行30余年的浆砌石拱坝典型芯样为例,基于计算机断层扫描(CT)技术构建了浆砌石真实三维孔隙网络模型,并对不同孔隙结构和水压差下浆砌石的渗流特性进行模拟。结果表明,高流速的渗流路径沿着大孔隙所在位置集中,流线更加顺直平滑,而其周围的小孔隙内渗流路径则较为分散;大孔隙中流速和流量更大,大流速会冲蚀浆砌石结构从而促进联通孔隙向着微裂隙转变,小孔隙向着大孔隙转变;随着水头差增大,浆砌石最大流速和最大流量均逐渐增大,且孔隙结构越发育,增大幅度越大。To investigate the seepage law of slurry masonry,a typical core sample of a masonry arch dam that has been running for more than 30 years in Guangdong Province was selected as the research object.Based on computer tomography(CT)technology,a real three-dimensional pore network model of masonry was built,and the seepage characteristics of masonry under different pore structures and water pressure differences were simulated.The results show that the seepage path of high flow velocity is concentrated along the location of the large pore gap,the streamline is more straight and smooth,and the seepage path in the small pores around is more dispersed;The flow velocity and flow rate in the large pores are larger,and the large flow velocity will erode the masonry structure,thus promoting the transformation of connecting pores into micro cracks,and the transformation of small pores into large pores;With the increase of water head difference,the maximum flow velocity and maximum flow rate of masonry gradually increase,and the more developed the pore structure,the greater the increased.

关 键 词：浆砌石 孔隙结构 CT技术 渗流 三维重建 

分 类 号：TV223.4[水利工程—水工结构工程]