【摘要】 复杂隧道内空气压力特性是隧道设计的重要参数,必须进行深入研究。为提高试验中信号强度和改善测量精度,采用水流代替气流作为流体介质进行复杂隧道模型实验,并研究竖井及中隔墙对空气压力特性的影响。得出了高速列车不同运行速度时复杂隧道内不同位置处的空气压力变化规律,即竖井可明显地降低隧道内的空气压力峰值和梯度,而中隔墙将恶化隧道内的空气压力环境。因此,在可能的情况下,对于复杂体型的长隧道,应尽量布设竖井而避免中隔墙。更多还原

【Abstract】 The air pressure characteristics in a complex tunnel are key factors to the design of the tunnels and need to be studied deeply.In order to enhance the signal intensity and improve the experimental precision,instead of air,water was chosen as the fluid medium and a hydraulic experiment was carried out for complex tunnels with vertical shafts and/or partition wall.Under different velocities,the air pressure processes caused by the train passing through complex tunnels were measured and analyzed.It was demonstrated by the test results that the vertical shafts can obviously decrease the pressure’s peak values and the pressure’s gradients,and the partition wall will worsen the aerodynamic environment.Therefore,if possible,vertical shafts should be chosen and partition walls should be avoided for long complex tunnels.更多还原