【摘要】 依托秦岭终南山18km特长公路隧道,选取隧道中部长度600多米的施工区段,设计风阻现场测试方案,布设2个测试断面,每个断面不同位置布设16个测点,采用高精度压差法对喷射混凝土作为隧道永久衬砌的通风阻力系数进行现场测试,测试风速范围为1.2~6.5m／s;通过数据整理分析,得出了通风阻力系数设计参数。试验表明:2车道公路隧道(净空面积70m2)喷射混凝土衬砌通风阻力系数在试验工况条件下为0.051,该参数值偏于保守,可直接用于指导通风设计。更多还原

【Abstract】 Authors rely on the 18 km long highway tunnel in Qinling Zhongnanshan Mountain, and choose a 600 m section in the construction area to design the ventilation resistance testing scheme, designing 2 testing section,setting 16 observation points on each section, adopting high precision differential pressure means to carrying on the site testing to the sprayed concrete as the ventilation resistance coefficient of the permanent lining of tunnel, and analysing the yield of ventilation resistance coefficient design parameter. The experimentation indicates that the ventilation resistance coefficient of shotcrete lining of tunnel in 2 lane highway tunnel (area of 70 m2) is 0. 051 in the operating condition, and the coefficient can be applied on tunnel ventilation design.更多还原