透明砂土基本特性及其在注浆模型试验中的应用  

Basic properties of transparent sand and its application to grouting model test

作　　者：胡焕校[1] 谢中良 甘本清 卢雨帆 邓超 HU Huanxiao;XIE Zhongliang;GAN Benqing;LU Yufan;DENG Chao(School of Geosciences and Info-physics,Central South University,Changsha 410083,China;College of Civil Engineering,Hunan City University,Yiyang 413000,China;Grouting Technology Research Center of Hunan City University,Yiyang 413000,China)

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]湖南城市学院土木工程学院,湖南益阳413000 [3]湖南城市学院注浆工程技术研究中心,湖南益阳413000

出　　处：《水资源与水工程学报》2024年第4期179-186,共8页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(52078494);湖南省教育厅科学研究项目——优秀青年项目(22B0790);益阳市哲学社会科学课题——青年重点项目(2023YS014);中南大学中央高校基本科研业务费专项资金项目(2022ZZTS0589、2022ZZTS0504、2022ZZTS0479);湖南城市学院大学生创新创业训练计划项目(S202311527032)。

摘　　要：透明土技术为可视化监测土体内部变形、渗流提供了有效手段,充分认识透明土透明度的影响因素是该技术发展的基础,亦是实现注浆模型试验浆液扩散可视化的前提。采用熔融石英颗粒和混合矿物油配制透明砂土,通过调整混合矿物油配比、熔融石英颗粒粒径、环境温度获得透明砂土。配制与标准砂级配相近的透明砂土,测试了透明土与标准砂的基本物理力学性能,并开展了大尺寸透明砂土注浆模型试验。结果表明:混合矿物油配比、熔融石英颗粒粒径对透明砂土透明度影响显著;混合矿物油折射率对温度较敏感,折射率随温度的升高而降低;与标准砂级配相近的透明土透明度较高,物理力学特性与标准砂相近,该透明砂土实现了注浆模型试验浆液扩散过程的可视化。研究成果对促进透明土技术发展及其在注浆模型试验中的应用具有借鉴意义。Transparent soil technology provides an effective means for visual monitoring of internal deformation and seepage within a soil mass.Fully understanding the influencing factors of transparency is the basis for the development of this technology and the premise for realizing the visualization of slurry diffusion of grouting.The transparent soil was prepared with fused quartz particles and mixed mineral oil,by adjusting the ratio of different mineral oil,the particle size of fused quartz and the ambient temperature.Then,the transparent sand with similar gradation to standard sand was prepared to compare the basic physical and mechanical properties of these two materials,after which the grouting model test of large-size transparent sand was carried out.The results show that the ratio of different mineral oil and the particle size of fused quartz have significant influence on the transparency of transparent sand;the refractive index of mixed mineral oil is sensitive to temperature,which decreases with the increase of temperature.In addition,the transparent sand prepared by fused quartz particles with similar gradation to standard sand is highly transparent and its physical and mechanical properties are similar to standard sand.The transparent sand makes the visualization of slurry diffusion process possible in grouting model test.The research results can provide a referencee for promoting the development of transparent soil technology and its application to grouting model test.

关 键 词：透明土 熔融石英颗粒 混合矿物油 物理力学特性 注浆扩散 

分 类 号：TV41[水利工程—水工结构工程]