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为了研究半横向通风送、排风孔形状和大小对隧道通风的影响,建立了港珠澳大桥海底隧道半横向通风孔物理模型;通过测试分析,研究了隧道内风量与风道内风量的关系以及不同风孔大小对隧道及风道静压的影响规律。结果表明:在相同通风动力下,送、排风孔面积越小越有利;在相同排风孔过风面积下,较高排风动力对应的通风效率较小;当变化风孔类型时,在送风段,风孔面积对风道内静压影响比较明显,在排风段,风孔形状对风道内静压影响比较明显。
In order to study the influence of semi-horizontal ventilation and exhaust hole shape and size on tunnel ventilation, a semi-transverse ventilation hole physical model for subsea tunnel of Hong Kong-Zhuhai-Macau Bridge was established. The relationship between the amount of air in tunnel and the amount of air in the tunnel was studied through the test and analysis. Influence of Different Air Hole Size on Static Pressure of Tunnel and Duct. The results show that under the same ventilating power, the smaller the area of sending and exhausting holes is, the more favorable the ventilation efficiency is; The air supply section and the air hole area have obvious influence on the static pressure in the air duct. In the air discharging section, the shape of the air hole has obvious influence on the static pressure in the air duct.