梁王山公路隧道弯折斜井施工通风污染物运移特性研究  

Study on the Characteristics of Pollutant Transport in Construction Ventilation of Curved Inclined Shaft of Liangwangshan Road Tunnel

作　　者：杨坚 YANG Jian(China Railway 15th Bureau Group No.4 Engineering Co.Ltd.,Xinzheng 451199,China)

机构地区：[1]中铁十五局集团第四工程有限公司,河南新郑451199

出　　处：《石家庄铁道大学学报(自然科学版)》2025年第1期35-42,共8页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(51508477);中铁十五局集团有限公司科技研发计划项目(2022-C28)。

摘　　要：为解决隧道施工通风中工区污染物运移缓慢,致使通风效率不佳的问题,依托福宜高速梁王山隧道工程,采用现场监测和数值模拟方法,探究了弯折斜井风流场稳定性及纵向衰减机制和隧道爆破下的污染物时空分布特征,揭示了风流场耦合效应与压差作用机理,以及施工期污染物动态运移规律。结果表明,在稳态流场下,作业面呈中间低、两侧高的压强分布梯度,最终形成涡流,影响排污效率;涡流影响区域与两侧压差大小呈正相关;顺接弯折圆弧路径风速、风压波幅小,对通风排污基本无影响;骤变弯折路径处风流因撞壁作用多向分流,部分风流回流形成小范围涡流,致使CO局部积聚,期间伴有风速波幅大、风压骤降等现象,对施工通风影响显著。In order to solve the problem of slow transport of pollutants in the work area during tunnel construction ventilation,resulting in poor ventilation efficiency,this paper relied on the Fuyi Expressway Liangwangshan Tunnel Project,and adopted on-site monitoring and numerical simulation methods to investigate the stability of the wind flow field of the curved inclined shaft and the mechanism of vertical attenuation,as well as the characteristics of the pollutant spatial and temporal distributions under the blasting of tunnels.The coupling effect of the wind flow field and the mechanism of the differential pressure,and the dynamic transport law of pollutants during the construction period was revealed.The results show that in the steady-state flow field,the working surface exhibits a pressure distribution gradient with low pressure in the middle and high pressure on both sides,ultimately forming vortex,affecting the efficiency of sewage;Vortex impact area and the size of the pressure difference between the two sides are positively correlated;The wind speed and pressure amplitude of the the bending arc path are small,basically has little effect on the ventilation and sewage;At the sudden bend path,the wind flow is diverted in multiple directions due to the collision of the wall,and part of the wind flow back to the formation of a small range of vortex,resulting in the local accumulation of CO,accompanied by large amplitude of wind speed and sudden drop of wind pressure,which has significant impact on construction ventilation.

关 键 词：公路隧道 弯折斜井工区 施工通风 污染物 现场监测 

分 类 号：U455[建筑科学—桥梁与隧道工程]