摘要:
[目的] 传统的环境地球物理的方法是垃圾场有害液体渗漏监测的主要手段之一,但该类方法存在监测范围小,灵活性差、时间间隔长、监测精度差等缺点。为了改善上述情况,研发了一种新型的分布式电法系统来监测有害液体的渗漏。 [方法] 从分布式电法系统原理入手,通过硬件、软件设计及实现,对设备系统进行研发及试验。该新型分布式电法系统采取一次性布极,全通道、多极距的数据采集方法,通过对各个检测电极采集到的电势分布进行分析可快速和准确地检测到渗漏点。 [结果] 野外试验结果表明:该新型分布式电法系统可快速、有效地检测到土壤电阻率变化情况,检测成果可靠,仪器设备分辨率高,数据直观,异常体位置明显,可有效圈定试验浇灌区域点。 [结论] 电法系统通过多次检测可实现对垃圾场试验液体渗漏进行动态监测,为环境岩土污染调查及检测、监测提供了有效的参考依据。
Abstract:
[Introduction] The traditional environmental geophysics method is one of the main solutions of monitoring liquid leakage of hazardous liquids in landfills. However, such methods have the defects of limited monitoring range, low flexibility, long time interval and poor monitoring accuracy. This article aims to establish a new distributed electrical method to monitor the leakage of hazardous liquids to improve the above situation. [Method] This article introduced the new method by starting from the basic principles of distributed electrical system, designation and implementation of the system's software and hardware, which contributed to the research, development and tests of the system. The new distributed electrical method adopted a data acquisition method, which had the features of one-time electrodes placement, full-channel and multi-electrode spacings. The leakage points could be detected quickly and accurately by analyzing the potential distribution collected by each electrode. [Result] Field test results show that the new distributed electrical method can detect the change of soil resistivity quickly and effectively, the test results are reliable, the resolution of collected data points is high, the data is intuitive, the position of abnormal body is obvious. The watered area and points can be effectively delineated. [Conclusion] The method can achieve dynamic monitoring of landfill liquid leakage through out multiple tests, which also provides an effective reference for detection, monitoring and environmental or geotechnical investigations.
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