污染土壤高压旋喷修复药剂迁移影响因素的透明土试验

Transparent Soil Test on Factors Affecting Transport of High-pressure Jet Remediation Agents in Contaminated Soil

基于透明土材料和Matlab图像处理技术,开展了高压旋喷修复药剂迁移透明土模型试验研究,实现了非嵌入式可视化地获得药剂的迁移过程。通过开展不同渗透压力差、粒径分布、孔隙比等情况下的药剂迁移试验,探究了不同因素下的迁移特性,并从药剂迁移速率和分布面积两方面进行了对比分析。结果表明:药剂迁移速率随大粒径颗粒含量、孔隙比、渗透压力差的减小而降低,并呈二次函数关系;药剂分布面积随时间不断增大,发展阶段可分为快速增长阶段和缓慢增长阶段。

By using the transparent soil materials and the Matlab image processing technology,a model experiment of high-pressure jet remediation agent transport in transparent soil was done to obtain the migration process of agents visually and non-intrusively.For studying the migration characteristics under the different void ratios,particle size distributions,and osmotic pressure differences,the model tests were conducted and the comparison of migration rate and distribution area was made.The results show that the migration rate decreases with the decrease of large particle size content,void ratio and osmotic pressure difference,and there is a similar quadratic function relationship between the factors and migration rate;the distribution area of agents enlarges with time elapsed,and the period of agent migration can be divided into two stages,i.e.rapid growth stage and slow growth stage.