深层搅拌技术在有机物污染场地原位化学氧化修复中的应用  

Application of the deep mixing method in in‑situ chemic

作　　者：刘志阳 臧常娟 郭都 曾跃春 黄旋 LIU Zhiyang;ZANG Changjuan;GUO Du;ZENG Yuechun;HUANG Xuan(Jiangsu DDBS Environment Remediation Co.,Ltd.,Nanjing Jiangsu 210012,China)

机构地区：[1]江苏大地益源环境修复有限公司,江苏南京210012

出　　处：《钻探工程》2023年第3期139-144,共6页Drilling Engineering

基　　金：国家重点研发计划项目“钻进-注入-监测耦合的一体化智能装备技术集成”(编号:2018YFC1802405)。

摘　　要：原位化学氧化修复可以通过浅层搅拌、建井注射、直推注射、高压旋喷和深层搅拌等方式实现氧化药剂向污染土壤和地下水的投加、混合以及反应。针对有机物污染场地的水文地质、污染分布和修复目标等情况,采用深层搅拌技术进行原位化学氧化修复的设计和实施,修复后土壤中各目标污染物检出浓度较场调时的初始浓度均有明显下降且低于修复目标值。工程实践表明,深层搅拌技术适用于污染较深、污染程度较轻的有机物污染场地的原位化学氧化修复,具有工艺成熟、混合均匀、占地少、环境影响小、性价比高和修复效果好等优点,有广阔的应用前景。深层搅拌技术在场地修复领域应用时,应考虑药剂对设备及其管线的腐蚀,操作人员的安全防护,以及修复后场地的承载力等事项。In‑situ chemical oxidation remediation can realize the dosing,mixing and reaction of chemicals to contaminated soil and groundwater through shallow mixing,injection well technology,direct push injection,high pressure rotary jet grouting and deep mixing.In view of the hydrogeology,pollution distribution and remediation target of the organic contaminated site,the deep mixing method was used to design and implement the in‑situ chemical oxidation remediation,and the detected concentration of each target contaminant in the soil after remediation is significantly lower than the initial concentration in the site investigation and lower than the target for remediation.The engineering practice shows that the deep mixing method is applicable to the in‑situ chemical oxidation remediation of organic contaminated sites with deep pollution depth and light pollution degree,and has the advantages of mature process,uniform mixing,less land occupation,small environmental impact,high cost performance and good remediation effect,and has broad application prospects.When the deep mixing method is applied in the field of site remediation,the corrosion of chemicals on equipment and pipelines,the safety protection of operators,and the bearing capacity of the site after remediation should be considered.

关 键 词：深层搅拌法 原位化学氧化 有机物污染场地 土壤修复 过硫酸钠 

分 类 号：P634[天文地球—地质矿产勘探] X21[天文地球—地质学]