分层止水技术在污染场地环境调查中的应用

Application of Stratified Water Shut-off Technology in Environmental Investigation of Contaminated Sites

摘要:

由于工业与化工企业违规排放废（污）水，造成了场地区域土壤与水资源的污染，在后期污染场地环境调查评价中，地下水污染深度界定尤为重要，地下水污染深度是地下水健康风险评估的主要依据。在河北省沧县某化工厂污染场地环境调查中，采用锥形止水器进行2层坐封式有效分层止水，准确界定地下水的污染深度。结合该工程实例，阐明分层止水器的分层止水技术进行第四系地下水污染深度调查、界定的技术方法。实践证明，该技术具有施工简单、使用灵活等优点，止水效果良好，技术有效、可行。

Abstract:

Due to illegal emission of waste water by the industrial and chemical enterprises, the soil and water resources around the contaminated sites are polluted. It is very important to define the polluted depth of groundwater in the later investigation and evaluation of contaminated sites, because the polluted depth of groundwater is the main basis of health risk assessment of groundwater. Take the case of environmental investigation of a chemical plant contaminated site in Hebei, the cone type water-stopping devices were used with 2 layers setting for effective stratified water shut-off, in order to obtain the accurate definition of the polluted depth of groundwater. This paper elaborates the technical methods by stratified water shut-off device in the investigation and definition of the polluted depth of Quaternary groundwater. The practice proves that this technology has advantages of simple construction and flexible use with good sealing effect and the technology is effective and feasible.