Research and Application of Ventilation Method of Wind Chamber during Construction of Long and Large Tunnels

2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA) Pub Date : 2021-11-12 DOI:10.1109/ISTTCA53489.2021.9654770

Jiyuan Zhu, Xun Ouyang, Zhengsheng Cao, Qibo Mou, Quansheng Chen, Xingyu Chen

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Abstract

To study the influence of the length of the air silo on the efficiency of the axial fan during the construction of the long tunnel in the silo ventilation mode, relying on the example of the Wulaofeng tunnel project of the Geyuan Expressway Project in Honghe Prefecture, Yunnan Province, three-dimensional wind chambers with different wind chamber lengths were established. The geometric model is based on FLUENT numerical simulation software. The calculation results show that when the length of the air bin increases from 5m to 20m, the area of the vortex area is reduced, and the ventilation efficiency is improved. When the length of the air bin is 20m, the ventilation efficiency of the fan is the highest. At the same time, it is concluded that the rectangular air bin can not better adapt to the field conditions and can not full to its function. The “Y” type air bin and its voltage regulator are designed. The field experiment shows that the “Y” air bin can better realize the allocation of air demand and air supply in each working face.

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大型长隧道施工中风室通风方法的研究与应用

为研究筒仓通风方式下长隧道施工中筒仓长度对轴流风机效率的影响，以云南红河州葛源高速公路工程五老峰隧道工程为例，建立了不同风室长度的三维风室。几何模型基于FLUENT数值仿真软件。计算结果表明，当气仓长度由5m增加到20m时，涡区面积减小，通风效率提高。当风仓长度为20m时，风机的通风效率最高。同时，得出矩形气仓不能较好地适应现场条件，不能充分发挥其功能的结论。设计了“Y”型气仓及其稳压器。现场试验表明，“Y”型风仓能较好地实现各工作面需风和送风的分配。

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2021 4th International Symposium on Traffic Transportation and Civil Architecture (ISTTCA)

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