【摘要】：非飽和土體的滲流問題,土石壩、堤防、基坑等的滲流控制、滲流場和應(yīng)力場的互相影響及其耦合計算,一直是土力學(xué)及巖土工程界中非常重要的問題,我國非飽和土體的研究起步晚,缺少一套能用于實踐的完整理論。在土體的滲流及應(yīng)力應(yīng)變分析中,沒有正確考慮非飽和土的滲流是不可能模擬的,分析中如果忽略非飽和土體基質(zhì)吸力對整個土體的影響,最終得出的土體變形及穩(wěn)定與實際情況會存在一定差別。并且目前許多土石壩、堤防等工程在安全分析中,較少考慮非飽和土的滲流作用影響以及滲流場、應(yīng)力場的耦合影響。 本文在總結(jié)前人研究成果的基礎(chǔ)上,闡述了非飽和土體滲流理論,非飽和土的土水特性曲線、滲透系數(shù)函數(shù),非飽和土滲流場、應(yīng)力場耦合計算的有限元方程,研究和探討了飽和-非飽和穩(wěn)態(tài)及瞬態(tài)的滲流計算有限元分析,堤防填筑軟土地基的耦合固結(jié),粘土心墻壩分層填筑竣工期的應(yīng)力變形分析、蓄水期考慮滲流場和應(yīng)力場耦合影響的應(yīng)力變形計算分析。
[Abstract]:The seepage problem of unsaturated soil, seepage control of earth-rock dam, dike and foundation pit, the interaction between seepage field and stress field and their coupling calculation are always very important problems in soil mechanics and geotechnical engineering. The study of unsaturated soil in China started late and lacked a complete theory that can be used in practice. In the analysis of soil seepage and stress and strain, it is impossible to simulate if the seepage of unsaturated soil is not considered correctly, if the influence of matrix suction of unsaturated soil on the whole soil mass is ignored in the analysis, Finally, the deformation and stability of soil will be different from the actual situation. At present, in the safety analysis of many earth-rockfill dams and dikes, the influence of unsaturated soil seepage and the coupling of seepage field and stress field are seldom considered. On the basis of summarizing the previous research results, this paper expounds the seepage theory of unsaturated soil, the soil water characteristic curve of unsaturated soil, the function of permeability coefficient, the seepage field of unsaturated soil and the finite element equation of stress field coupling calculation. The finite element analysis of saturated-unsaturated steady state and transient seepage calculation, the coupling consolidation of embankment and soft soil foundation, and the stress and deformation analysis of clay core dam during the completion period of layered filling are studied and discussed. Calculation and analysis of stress and deformation considering the coupling effect of seepage field and stress field in water storage period.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TU43

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