摘要
以某寒区隧道为工程背景,通过Fluent与Ansys的假耦合计算,建立围岩、衬砌及洞内气体的流固对流换热模型。计算结果表明:随着时间的推移,洞内气体和围岩温度场逐渐趋于稳定,洞内气温变化剧烈段为进出口50 m范围内,15 d气体温差达1.4℃。在最不利气温下,30 d围岩负温影响深度为10 m左右,冻结深度为5 m左右,其中仰拱受温度影响最大,拱顶和拱腰次之,在二衬表面铺设5 cm厚保温层能防止隧道发生冻结。其结论可为寒区隧道保温措施提供一定理论依据。
Based on the engineering of a tunnel in cold region,the convective heat transfer fluid-solid model of surrounding rock,lining and inside gas has been built by false coupling calculation of the Fluent and Ansys.The results show that：With the passage of time,the gas of inside cave and surround-ing rock＆#39;s temperature approched a stable value,the severe changed temperature of inside cave present to the scope of the import and export of 50 m.After 15days,the difference of gas temperature is 1.4 ℃.In the most unfavorable temperatures,after 30 days,the depth of negative temperature affected surrounding rock is about 10 m.The freezing depth is about 5m,which the invert is affected by temperature most ob-viously,vault and haunch followed.In the surfacing of secondary lining 5 cm thick insulation layer is a-ble to achieve the insulation effect of the tunnel.The conclusions provide some theoretical for insulation measures in the cold region tunnels.
出处
《公路工程》
北大核心
2014年第1期40-43,共4页
Highway Engineering
基金
国家科技支撑计划(2012BAG05B00)
关键词
寒区隧道
温度场
耦合计算
保温材料
tunnel in cold region
temperature field
false coupling calculation
insulation mate-rial
