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山东大学学报 (工学版) ›› 2021, Vol. 51 ›› Issue (3): 52-60.doi: 10.6040/j.issn.1672-3961.0.2020.468

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硬岩隧道施工通风系统优化与抑尘效果评价

王春国   

  1. 中铁十四局集团隧道工程有限公司, 山东 济南 250003
  • 出版日期:2021-06-20 发布日期:2021-06-24
  • 作者简介:王春国(1971— ),男,山东青岛人,高级工程师,主要研究方向为隧道工程. E-mail:wztgzy@yeah.net
  • 基金资助:
    山东省重点研发计划资助项目(2018GHY115015)

Optimization of ventilation system of TBM tunnel construction and evaluation of dust suppression effect

WANG Chunguo   

  1. Tunnel Engineering Co., Ltd., China Railway 14 Bureau Group, Jinan 250003, Shandong, China
  • Online:2021-06-20 Published:2021-06-24

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摘要： 硬岩隧道掘进机(tunnel boring machine, TBM)在施工过程中会产生大量粉尘,粉尘是影响操作环境与工人身体健康的重要因素。为了进一步优化施工通风除尘效果,结合青岛地铁1号线双护盾TBM实际工况,使用Ansys-Fluent软件对隧道开挖过程进行数值分析。检测隧道各位置风速及粉尘质量浓度并与数值模拟结果进行对比,进而验证模型的有效性。针对TBM隧道施工过程中是否必要开启除尘系统,以及除尘风口位置和最优吸风流量选择等问题,开展数值模拟计算。研究结果表明:当关闭除尘系统或开启除尘系统但吸风流量在4 m3/s以下时,粉尘扩散到TBM掘进区大部分区域;在除尘风管距离掌子面15 m,吸风流量为12 m3/s时,除尘效果达到最佳,粉尘扩散全面距离降低至45 m,可以有效除尘。本研究结果可以为隧道通风除尘设计与施工提供科学依据。

关键词: 隧道掘进机, 通风系统, 抑尘效果, 数值模拟, 粉尘扩散

Abstract: Hard rock tunneling boring machine(TBM)produces a large amount of dust during construction, which is an important factor affecting the operating environment and the health of workers. To further optimize the construction ventilation and dust removal effect, combined with the actual working conditions of Qingdao Metro Line 1 double shield TBM, Ansys-Fluent software was used to carry out numerical analysis of the tunnel excavation process. The wind speed and dust mass concentration at each location of the tunnel were detected and compared with the numerical simulation results to verify the effectiveness of the model. In view of whether it is necessary to open the dust removal system in the process of TBM tunnel construction, as well as the location of dust removal tuyere and the selection of optimal suction flow, numerical simulation was carried out. When the dust removal system was turned off or the dust removal system was turned on but the suction flow was below 4 m3/s, and the dust diffuses to most areas of the TBM tunneling area. When the dust duct was 15 m away from the hand surface and the suction airflow was 12 m3/s, the dust removal effect reached the best, and the dust diffusion distance was reduced to 45 m, which could effectively remove dust. The research results could provide a scientific basis for the design and construction of tunnel ventilation and dust removal.

Key words: tunnel boring machine, ventilation system, dust suppression effect, numerical simulation, dust diffusion

中图分类号: 

  • U455
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