隧道L型斜井施工期通风系统配置优化
Optimization of Ventilation System Configuration during the Construction of L-Shaped Inclined Shafts of Tunnels
崔光耀 1陈然1
作者信息
- 1. 北方工业大学 土木工程学院,北京 100144
- 折叠
摘要
针对隧道L型斜井的施工期通风问题,以某隧道为依托工程,采用数值模拟软件对L型斜井隧道进行模拟,分析不同风机组合下的通风效果,并对L型斜井进行通风优化.研究结果表明,施工期通风系统初选需风量为3491m3/min,风压为5230Pa,考虑到斜井线型为L型,对三种满足初选要求的方案进行比选,模拟发现 2×160kw风机的通风效果较好,但出口断面处CO的平均浓度为4.072×10-5m3/min,仍不符合规范.在此基础上进行优化,在转角处设置 1台75kw的局扇,优化后出口断面CO的平均浓度为3.25×10-12kg/m3,满足规范要求,建议该工程选用2×160kw(风机)+1×75kw(局扇)通风方案进行斜井通风.研究成果可为类似工程施工期通风方案的确定提供参考.
Abstract
Aiming at the ventilation problem of tunnel L-shaped inclined shaft during the construction peri-od,a tunnel is taken as the support project,and numerical simulation software is adopted to simulate the tunnel with L-shaped inclined shaft,to analyse the ventilation effect under different combinations of fans and to opti-mize the ventilation of L-shaped inclined shaft.The results of the study show that the initial selection of the ventilation system during the construction period requires an air volume of 3491m3/min and an air pressure of 5230Pa.Considering that the line shape of the inclined shaft is L-type,three schemes that satisfy the initial se-lection requirements are compared,and the simulation reveals that the ventilation effect of the 2×160kw fan is better,but the average concentration of CO at the exit section is4.072×10-5m3/min,which is still out of com-pliance with the specification.On this basis,optimization is carried out,and 1 set of 75kw local fan is set at the corner,and the average concentration of CO at the exit section after optimization is 3.25×10-12kg/m3,which meets the specification requirements,and it is recommended that2×160kw(fan)+1×75kw(local fan)ventila-tion scheme should be selected for inclined shaft ventilation in this project.The research results can provide ref-erence for the determination of ventilation programme during the construction period of similar projects.
关键词
隧道工程/斜井通风/施工期/局扇/配置优化Key words
tunnel engineering/inclined shaft ventilation/construction period/local fan/configuration op-timization引用本文复制引用
出版年
2024
NETL
NSTL
万方数据