上海地区污染场地垂直隔离屏障设计方法与参数研究

Study on design criteria and design parameters for vertical barriers of pollution site in Shanghai

目前污染场地垂直阻隔技术在国内的应用还属于起步阶段,相关工程实例较少,缺乏具体的实用设计方法及设计参数的获取手段是阻碍应用推广的重要障碍之一。本文基于上海市地质条件特征,探讨了上海地区隔离屏障的污染迁移特点,提出了上海市隔离屏障设计的主要原则,基于对流—扩散机理提出了嵌入式及悬挂式隔离屏障的设计方法,并通过文献调研、室内试验等手段确定了相关设计参数,最终将相关研究成果应用于具体的工程案例。该成果的成功运用,初步验证了本文方法的有效性及合理性,拟通过未来更充分、更长期的监测为隔离屏障设计及参数获取提供更充足的依据。

Due to lack of the effective design criteria and parameters, the vertical barriers are less applied in China for site remediation. According to the conditions and characteristics of geological in Shanghai, the migration law of contaminant is discussed while the main design criteria for vertical barriers are proposed. The design methods of the embedded-type and the suspended-type vertical barriers are deduced base on the convection-dispersion model. In addition the permeability coefficient and diffusion coefficient are obtained through the literature researches, the laboratory tests and field test. All of these gains are applied in a real project, which verifies the effectiveness of design criteria and design parameters. However more monitoring data are needed in the future for the design and parameters.