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首页> 外文会议>17th Anniversary of the International Simulatros Conference, Apr 16-20, 2000, Washington, D.C. >MODELING OF UNSATURATED FLOW IN SOIL SOLIDIFIED WITH COLLOIDAL SILICA
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MODELING OF UNSATURATED FLOW IN SOIL SOLIDIFIED WITH COLLOIDAL SILICA

机译：胶态二氧化硅固溶土壤中非饱和流的模拟

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摘要

At a U.S. Department of Energy (DOE) Brookhaven National Laboratory (BNL) site, a small volume of unsaturated sand around the subsurface-located radioactive facility was impacted by radioactive contamination. To limit the contamination load reaching the water table, the contaminated soil will be solidified by injections of colloidal silica that gels in place. Because the newly formed porous medium created by the silica injections will have a reduced porosity, lower permeability and significantly altered moisture retention properties, it will limit the unsaturated flux and decrease the leaching rate of contaminant from the solidified zone. The sand solidification process was simulated under laboratory conditions, and the soil parameters, including water retention curves, were laboratory determined. These parameters were used to model a new unsaturated flow regime for the site in question to verily that the contaminant load, which leaves the solidified zone, would not exceed regulatory standards. Modeling was conducted using PORFLOW~(TM) software. The results of these modeling efforts and information on the input data acquisition are presented in this paper.
机译：在美国能源部（DOE）布鲁克黑文国家实验室（BNL）的现场，位于地下的放射性设施周围的少量不饱和沙子受到放射性污染的影响。为了限制到达地下水位的污染物负荷，被污染的土壤将通过注入胶凝的硅胶来固化。由于通过二氧化硅注入产生的新形成的多孔介质将具有降低的孔隙率，较低的渗透率并显着改变了水分保持性能，因此它将限制不饱和通量并降低来自固化区的污染物的浸出率。在实验室条件下模拟了沙子的凝固过程，并在实验室确定了土壤参数，包括保水曲线。这些参数用于为所讨论的站点建模新的不饱和流态，以确实确保离开固化区的污染物负荷不会超过监管标准。使用PORFLOW TM软件进行建模。本文介绍了这些建模工作的结果以及有关输入数据获取的信息。

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