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A Study on Large Power Jet Ventilation Technology in Long Tunnel Construction

机译：长隧道施工大型电动喷射通风技术研究

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One of difficulties in super long tunnels' construction is the construction ventilation to meet the requirement of normal construction environment and assure the workers' health. Using traditional tunnelling ventilation is very difficult to meet the need of super long tunnel construction. As the energy assumption is high and it is very expensive. This paper investigated the simulation of tunnel construction ventilation with large power jet fans during the construction of Jinping Auxiliary Tunnels by using the computational fluid code FLUENT, the layout of jet fans in the tunnels is optimized. It is found that the best layout of the jet fan is aroud the transverse channel under the direction of airflow and jet fan should not be too far away from the transverse channel. The CO mainly distributes in the upper part of the tunnel when the jet fan is installed at a higher position, this layout of the jet fan is beneficial to construction of tunnels.
机译：超长隧道建设中的困难之一是满足正常建设环境要求，并确保工人健康的建设通风。使用传统的隧道通风非常难以满足超长隧道施工的需求。随着能量假设高，它非常昂贵。本文通过使用计算流体代码流畅，调查了在锦平辅助隧道施工过程中隧道施工通风的仿真。隧道中喷射风扇的布局进行了优化。结果发现，在气流方向下横向通道的最佳布局是不应离横向通道不太远离横向沟道。 CO主要分布在隧道的上部当喷射风扇安装在较高位置时，该喷射风扇的布局有利于隧道的构造。

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