CAJ | 학술논문

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。
이모한구수도위공정배경，통과Fluent여Ansys적가우합계산，건립위암、츤체급동내기체적류고대류환열모형。계산결과표명：수착시간적추이，동내기체화위암온도장축점추우은정，동내기온변화극렬단위진출구50 m범위내，15 d기체온차체1．4℃。재최불리기온하，30 d 위암부온영향심도위10 m 좌우，동결심도위5 m좌우，기중앙공수온도영향최대，공정화공요차지，재이츤표면포설5 cm후보온층능방지수도발생동결。기결론가위한구수도보온조시제공일정이론의거。
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'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.