海底隧道独头钻爆施工通风三维数值分析  

3D Numerical Simulation on Construction Ventilation of Subsea Tunnels with Single-head Drilling and Blasting

作　　者：楚少虎 董俊强 朱正国[1,2] 陈立保 孙文昊[3] CHU Shaohu;DONG Junqiang;ZHU Zhengguo;Chen Libao;SUN Wenhao(Ministry of Education Key Laboratory of Roads and Railway Engineering Safety Control,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Province Technical Innovation Center of Safe and Effective Mining of Metal Mines,Shijiazhuang 050043,China;China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)

机构地区：[1]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,河北石家庄050043 [2]河北省金属矿山安全高效开采技术创新中心,河北石家庄050043 [3]中铁第四勘察设计院集团有限公司,湖北武汉430063

出　　处：《甘肃科学学报》2023年第3期82-87,共6页Journal of Gansu Sciences

基　　金：国家自然科学基金项目(51978424);中铁第四勘察设计院有限公司科研课题(2019K041)。

摘　　要：海底隧道长且竖井少,独头钻爆掘进距离长,施工通风问题突出。以青岛胶州湾第二海底隧道为依托,对钻爆法独头掘进施工的海域段隧道进行了压入式通风条件下掌子面附近风流流场、CO浓度场以及隧道内部粉尘扩散规律的研究。结果表明:根据掌子面处风速要求,风筒出风口距离掌子面40 m处是可行的;隧道通风后,涡流区域粉尘浓度分布不均,隧道风管一侧浓度明显大于另一侧,大部分粉尘在距离掌子面100 m内发生沉降和捕获;并根据CO浓度要求,确定了不同掘进距离和供风量情况下的进洞安全时间。The long subsea tunnel has few shafts,and the single-head drilling and blasting has a long excavation distance,so the construction ventilation problem is prominent.Based on the second subsea tunnel of Jiaozhou Bay in Qingdao,the wind flow field,the CO concentration field near the tunnel face and the dust diffusion law in the tunnel under the condition of forced ventilation were carried out for research with the tunnel in the sea area excavated by the drill-and-blast method.The results show that it is feasible for the air outlet of the fan to be 40 m away from the face on the wind speed basis.Along with the tunnel is ventilated,the dust concentration distribution in the vortex area is uneven,and the concentration on one side of the tunnel air duct is significantly higher than that on the other side,and most of the dust settles and captures within 100 m from the tunnel face.According to the CO concentration requirements,the safe time for entering the hole under different driving distances and air supply volumes is determined.

关 键 词：海底隧道 独头掘进 压入式通风 ICEM软件 

分 类 号：U453.5[建筑科学—桥梁与隧道工程]