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重塑土壤承壓模型的建立與試
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-sinkage Characteristic Model of Remolded Soil
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    摘要:

    使用小面積壓板在重塑軟粘土中進行壓板沉陷試驗,分析壓板尺寸、土壤含水率、土壤密度及樣筒筒徑對土壤承載力的影響。試驗曲線擬合表明重塑土壤的承壓特性滿足二階多項式模型。由擬合方程分析可知,模型各項系數(shù)隨含水率呈對數(shù)變化、隨土樣密度呈線性變化、隨著密度和含水率的耦合關(guān)系呈對數(shù)變化,筒徑變化使二次項系數(shù)符號發(fā)生變化。大田實際土壤的試驗表明,其承壓曲線也滿足二階多項式模型。

    Abstract:

    A plate sinkage test was conducted on remolded soft soil with small-sized plates to determine the effects of plate size, soil moisture content, soil bulk density and the diameter of sampling cores on the soil bearing capacity. Curve fitting on the resultant data revealed a 2nd order polynomial model of remolded soil bearing capacity. Further analysis on the fitted equation revealed a trend of logarithmic variation of each coefficient of the model with moisture content, a linear trend with soil bulk density, a logarithmic trend with the coupling of density and moisture content. The change of core diameter led to a shift of sign of the second order coefficient. A trial test on the field soil also showed a 2nd order trend of the bearing curve.

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姚艷,丁啟朔,周俊.重塑土壤承壓模型的建立與試[J].農(nóng)業(yè)機械學(xué)報,2010,41(3):40-45.-sinkage Characteristic Model of Remolded Soil[J]. Transactions of the Chinese Society for Agricultural Machinery,2010,41(3):40-45.

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