本文選題：馬蹄形隧道 + 圓形隧道　； 參考：《隧道建設》2016年11期

【摘要】：除了少數(shù)圓形隧道外,大部分山嶺交通隧道斷面采用馬蹄形或端墻式等形狀。在隧道溫度場的預測中,圓形斷面模型能否代替馬蹄形等實際隧道模型,其適應性值得研究。應用基于空氣-襯砌-圍巖的對流-導熱耦合作用控制方程的有限差分方法,建立圓形斷面模型對東北寒區(qū)馬蹄形隧道溫度場進行計算,并與現(xiàn)場實測溫度場進行對比。結(jié)果表明:1)圓形斷面隧道模型有限差分計算方法克服了通用有限元軟件建模復雜、對硬件要求高的弊端,考慮了隧道內(nèi)風流速度和入口風流溫度的影響,在隧道溫度場的預測計算中能夠滿足工程使用要求。2)隧道內(nèi)風流速度和入口風流溫度對隧道溫度場影響較大。本文算例中,入口風流溫度每升高10℃,二次襯砌表面溫度升高約7.2℃,增幅均勻;從1~5 m/s,洞內(nèi)風流速度每增大1 m/s,二次襯砌表面溫度降低的幅度為6.6、2.7、1.5、0.9℃,降幅越來越小。
[Abstract]:Apart from a few circular tunnels, most mountain traffic tunnels have horseshoe or end-wall shapes. In the prediction of tunnel temperature field, it is worth studying whether the circular section model can replace the actual tunnel model such as horseshoe. Using the finite difference method based on the governing equation of convection-heat conduction coupling between air lining and surrounding rock the circular section model is established to calculate the temperature field of the horseshoe tunnel in the cold region of Northeast China and the temperature field is compared with the field measured temperature field. The results show that the finite difference calculation method of circular cross section tunnel model overcomes the disadvantages of complex finite element software modeling and high hardware requirement, and considers the influence of air flow velocity and inlet air flow temperature in the tunnel. In the prediction and calculation of tunnel temperature field, the tunnel temperature field is greatly affected by the velocity of air flow in tunnel and the temperature of inlet air flow. In this paper, for every 10 鈩，

本文編號：2014937