本文選題：氣溫 + 滲透系數(shù)��； 參考：《南水北調(diào)與水利科技》2017年03期

【摘要】：基于多相流及多場耦合理論,采用有限單元法計(jì)算了三峽庫區(qū)木魚包滑坡體溫度隨氣溫變化情況,進(jìn)而依據(jù)溫度與水體黏滯性的相關(guān)關(guān)系分析氣溫變化對坡體滲流的影響。計(jì)算表明,坡內(nèi)溫度受氣溫影響僅限于坡體淺層區(qū)域,距地表深度越深,影響程度越小,在時間上的滯后性越大。溫度變化可改變水的黏滯性,進(jìn)而引起土體滲透參數(shù)的改變,計(jì)算表明因氣溫變化引起的坡體滲透性改變較為顯著。坡體滲透系數(shù)受氣溫變化的影響隨深度呈非線性分布,距地表越深受氣溫變化的影響越弱,通常大于雨水最大入滲深度以后,坡體滲透系數(shù)不再發(fā)生顯著變化。另外,坡體滲透系數(shù)隨氣溫呈現(xiàn)季節(jié)性變化規(guī)律,夏季氣溫高于坡內(nèi)土體溫度,滲透系數(shù)隨深度的增加而減小;冬季坡體內(nèi)溫度高于氣溫,滲透系數(shù)隨深度的增加而增加。
[Abstract]:Based on the theory of multi-phase flow and multi-field coupling, the variation of temperature with temperature of woodfish package landslide in the three Gorges Reservoir area is calculated by using finite element method, and the influence of temperature change on percolation of slope body is analyzed according to the correlation between temperature and viscosity of water body. The results show that the influence of temperature on the slope temperature is limited to the shallow layer of the slope, the deeper the depth from the surface is, the smaller the influence degree is, and the greater the lag in time is. The change of temperature can change the viscosity of water and cause the change of soil permeability parameters. The calculation shows that the change of slope permeability caused by temperature change is more significant. The influence of air temperature on the permeability coefficient of slope is nonlinear distribution with the depth. The more deeply affected by the temperature change the weaker the influence is from the surface. When the permeability coefficient of slope is larger than the maximum infiltration depth of Rain Water the permeability coefficient of slope body will not change significantly. In addition, the slope permeability coefficient changes seasonally with the temperature, the summer temperature is higher than the slope soil temperature, the permeability coefficient decreases with the depth increase, the winter slope temperature is higher than the temperature, the permeability coefficient increases with the depth increase.
【作者單位】： 三峽大學(xué)水利與環(huán)境學(xué)院;
【基金】：國家自然科學(xué)基金(51279090)~~
【分類號】：TV698.12

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