摘要
城市地下交通联系隧道受其平面曲线半径和纵坡的影响,沿程阻力系数变化规律不同于普通公路直线隧道和一般的曲线隧道。以解放碑地下环道三期工程嘉滨路连接隧道通风工程为依托,采用CFD软件,进行不同平面曲线半径和不同纵坡率的流场数值模拟,从沿程阻力系数值、断面风速等方面进行了分析,数值模拟结果表明纵坡对隧道的阻力损失没有明显的影响;而半径影响较大,尤其是当半径小于200 m后,沿程阻力系数增加尤其明显,并对半径在30~200 m范围内的城市超小半径隧道沿程阻力系数计算公式进行了优化。
The urban underground traffic connection tunnel is affected by its curve radius and longitudinal slope,the change law of drag coefficient along the way is different from the ordinary highway straight tunnel and the general curve tunnel.The paper is based on the ventilation engineering of Jiabin Road connection tunnel of the third phase of Jiefangbei Underground Ring Road.The numerical simulation of the flow field with different plane curve radius and different longitudinal slope rate was carried out on the tunnel using CFD software.Analyzed from the value of drag coefficient along the way,wind speed of cross section.Numerical simulation results show that the longitudinal slope has no obvious effect on the resistance loss of the tunnel.The radius has a great influence on the coefficient,especially when the radius is less than 200 m,the coefficient increase is particularly obvious.The formula for calculating the drag coefficient of urban ultra-small radius tunnels with a radius of 30~200 m is optimized.
作者
高峰
何江
冉飞
贾山
尹定鹏
GAO Feng;HE Jiang;RAN Fei;JIA Shan;YIN Dingpeng(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;China Construction Eighth Engineering Division ,Co.,Ltd.,Shanghai 200135,China)
出处
《公路工程》
2022年第2期49-54,60,共7页
Highway Engineering
基金
国家自然科学基金项目(51778095)。
