环境保护科学2025，Vol.51Issue(6)：65-72,8.DOI:10.16803/j.cnki.issn.1004-6216.202412032
膨润土协同水泥注浆法在环境治理工程中的应用
Application of bentonite-coordinated cement grouting method in environmental improvement projects
摘要
Abstract
Blocking the migration pathways of heavy metals from landfills to groundwater is crucial for protecting groundwater resources and mitigating environmental risks.An informal landfill site in the North China Plain was selected as the research subject,and a bentonite-coordinated cement grouting method was employed at the pilot-scale site.After 28 days,the anti-seepage effect of grouting was evaluated by water injection tests and core sample comparisons.The results showed that a horizontal water-stop curtain could be formed in the sandy pebble stratum after grouting a mixture of water,PC42.5 cement and bentonite(ratio of 7.0∶5.0∶2.8),through grouting hole pipes with an inner diameter of 20 mm,into holes with both row and column spacing of 2.50 m.The permeability coefficient of the water-stop curtain was higher than that of natural aquitards such as silty soil and silty clay.The impermeable top plate of the aquifer was successfully restored by the water-stop curtain,and the migration pathway of heavy metals from the landfill to groundwater was effectively blocked.The application of this technology in landfill environmental improvement realized the replacement of excavation with blocking,and remediation time and costs were significantly saved.Significant environmental,economic,and social benefits were achieved,and it has broad popularization and application value.关键词
膨润土协同水泥注浆法/止水帷幕/注水试验/水文地质/垃圾填埋场/环境治理Key words
bentonite-coordinated cement grouting method/water-stop curtain/water injection test/hydrogeology/landfill/environmental improvement分类
资源环境引用本文复制引用
冯利强,陈明,王聪,付宁,冯晓洲,吴晶晶,王瑞龙,郭凌飞..膨润土协同水泥注浆法在环境治理工程中的应用[J].环境保护科学,2025,51(6):65-72,8.基金项目
全国地下水污染防治试点项目(环办土壤函[2020]125号) （环办土壤函[2020]125号）
河南省财政厅2020年中央水污染防治资金(第二批,豫财资环[2020]55号) （第二批,豫财资环[2020]55号）
