本文選題：大變形 + 非Darcy滲流��； 參考：《哈爾濱工程大學(xué)學(xué)報(bào)》2017年08期

【摘要】：為了研究土體在非線性滲流下的固結(jié)效應(yīng),基于大變形固結(jié)理論,考慮非線性滲流(耦合非Darcy滲流與變滲透系數(shù))作用,建立了二維固結(jié)控制方程與有限元方程。采用自編程序?qū)δ骋火ば酝馏w的固結(jié)過程進(jìn)行了計(jì)算。通過大量變動(dòng)參數(shù)的計(jì)算與分析,探討了非Darcy滲流與滲透系數(shù)隨固結(jié)變化的影響。計(jì)算結(jié)果表明:與Darcy滲流相比,非Darcy滲流下的沉降小,超孔壓消散緩慢,具有延遲效應(yīng)。其中,非Darcy滲流試驗(yàn)常數(shù)m影響較大,線性滲流起始水力梯度iL影響較小。滲透系數(shù)變化對(duì)固結(jié)的影響與非Darcy滲流相似,壓縮指數(shù)與滲透系數(shù)指數(shù)比值αc的影響較大。在非Darcy滲流與滲透系數(shù)隨固結(jié)變化的耦合作用下,沉降顯著減小,超孔壓消散趨于緩慢,延遲效應(yīng)更為明顯。
[Abstract]:In order to study the consolidation effect of soil under nonlinear seepage, based on the consolidation theory of large deformation, considering the effect of nonlinear seepage (coupled non-Darcy seepage and variable permeability coefficient), a two-dimensional consolidation control equation and a finite element equation are established. The consolidation process of a certain clay soil is calculated by using self-compiled program. Through the calculation and analysis of a large number of variable parameters, the influence of non-Darcy seepage flow and permeability coefficient on consolidation is discussed. The results show that compared with Darcy seepage, the settlement of non-Darcy seepage is smaller, the excess pore pressure dissipates slowly and has the effect of delay. Among them, the influence of non-Darcy seepage test constant m is great, and the influence of linear initial hydraulic gradient iL is small. The effect of the change of permeability coefficient on consolidation is similar to that of non-Darcy seepage, and the ratio of compression index to permeability index 偽 c has a great influence on consolidation. Under the coupling of non-Darcy percolation and permeability coefficient with consolidation, the settlement decreases significantly, the superpore pressure dissipates slowly, and the delay effect becomes more obvious.
【作者單位】： 西京學(xué)院土木工程學(xué)院;大連理工大學(xué)建設(shè)工程學(xué)部土木工程學(xué)院巖土工程研究所;大連理工大學(xué)海岸和近海工程國家重點(diǎn)實(shí)驗(yàn)室;同濟(jì)大學(xué)地下建筑與工程系;
【基金】：國家自然科學(xué)基金項(xiàng)目(41572252)
【分類號(hào)】：TU43

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