螺旋隧道独头掘进压入式通风参数研究
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摘要
以卧龙沟1号隧道施工通风工程为依托,采用CFD软件,进行不同风筒出口距离和不同风筒布置方式的流场数值模拟,从射流风速流场、风速变化曲线、涡流区风速等方面分析了流场特征。研究表明:在R=720m左右的螺旋隧道中,风管出风口置于隧道轴线螺旋外侧时通风效果最好,且出风口距掌子面距离不宜大于40m。
Based on the construction of ventilation project of Wolonggou No.1 tunnel,CFD software was used to simulate the flow field of different outlet distances and different arrangement modes of air ducts.The characteristics of the flow field were analyzed from the aspects of jet velocity field,wind speed variation curve and wind speed in eddy zone.The research shows that the ventilation effect is the best when the duct outlet is placed outside of the spiral of the tunnel axis in the spiral tunnel with R=720 m,and the distance between the outlet and the face of the tunnel should not be more than 40 m.
Based on the construction of ventilation project of Wolonggou No.1 tunnel,CFD software was used to simulate the flow field of different outlet distances and different arrangement modes of air ducts.The characteristics of the flow field were analyzed from the aspects of jet velocity field,wind speed variation curve and wind speed in eddy zone.The research shows that the ventilation effect is the best when the duct outlet is placed outside of the spiral of the tunnel axis in the spiral tunnel with R=720 m,and the distance between the outlet and the face of the tunnel should not be more than 40 m.
引文
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[6]曹魏杨.大断面瓦斯隧道施工通风优化及风险管理[D].重庆:重庆大学,2017.CAO Weiyang.Construction Ventilation Optimization and Risk Management of Large Section Gas Tunnel[D].Chongqing:Chongqing University,2017.
[7]刘钊春.独头掘进隧道施工通风数值模拟[D].西安:西安理工大学,2010.LIU Zhaochun.Numerical Simulation on Construction Ventilation of Single head Tunnel[D].Xi'an:Xi'an University of Technology,2010.
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