【摘要】：針對細(xì)粒土中污染液清理的塑料排水板抽注水淋洗技術(shù),考慮塑料排水板打設(shè)時(shí)不可避免的涂抹效應(yīng)引起的土體干密度、孔隙率以及滲透系數(shù)的變化,并借鑒塑料排水板地基固結(jié)等應(yīng)變理論的思想,假定同一深度上污染液濃度的變化速率為其變化速率的平均值,同時(shí)依據(jù)相關(guān)研究成果,忽略豎向滲流和分子擴(kuò)散作用,采用分離變量法推導(dǎo)得到了淋洗過程中任意位置污染液濃度隨時(shí)間變化過程的簡化軸對稱解析解答,并分析了涂抹效應(yīng)對污染液淋洗清理速率的影響.結(jié)果表明,涂抹區(qū)土體滲透系數(shù)和涂抹區(qū)范圍對污染液清理速率有著顯著的影響,在塑料排水板抽注水淋洗技術(shù)的設(shè)計(jì)和分析中,考慮涂抹效應(yīng)是十分必要的.
[Abstract]:In view of the plastic drainage board pumping and injection water leaching technology for cleaning up contaminated liquid in fine soil, the variation of soil dry density, porosity and permeability coefficient caused by the unavoidable smearing effect during the laying of plastic drainage board is considered, and the variation of contaminated liquid concentration at the same depth is assumed based on the idea of equal strain theory of consolidation of plastic drainage board foundation. Based on the relative research results, neglecting vertical seepage and molecular diffusion, the simplified axisymmetric analytical solution of the concentration of contaminated liquid changing with time at any position in the leaching process was derived by using the separation variable method. The effect of smearing on the leaching cleaning rate of contaminated liquid was analyzed. The results show that the soil permeability coefficient and the scope of the smeared area have a significant effect on the cleaning rate of the contaminated liquor. It is necessary to consider the smearing effect in the design and analysis of the plastic drainage board pumping and injection washing technology.
【作者單位】： 河海大學(xué)巖土力學(xué)與堤壩工程教育部重點(diǎn)實(shí)驗(yàn)室;河海大學(xué)江蘇省巖土工程技術(shù)工程研究中心;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51278171,41530637) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金資助項(xiàng)目(2015B06014,2015B25914)
【分類號(hào)】：X505
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本文編號(hào)：2212120