To clarify the air volume and pollutant distribution
of each ramp and main line of underground interchange in complex urban areas,
and determine the operating condition of the exhaust fan and the configuration
of the jet fan in the working shaft under the operation ventilation mode, the
network ventilation algorithmbased IDA RTV software is used to
simulate and calculate the distribution of pollutants and air volume in the
tunnel under different traffic conditions. The fan configuration under
different traffic conditions is determined. Meanwhile, the proportion of
pollutant discharge in the shaft under different combined conditions is
simulated and the optimal combined conditions are determined. The results show
that: (1) when the national Ⅳ standard is used to
calculate the pollutant emission of vehicles, the traffic wind can meet the
requirements of the tunnel air volume under the current traffic volume and the
operating conditions without jet fan; (2) a certain number of jet fans need to
be opened under blocking conditions. In the case of wind exhaust of the
southern route, it is recommended to adopt the mode of one air supply fan and
three air exhausters. In this case, the
pollutant discharge ratio of the vertical shaft is 65%.
ZHANG Aoyu, DENG Min
.
Operation Optimization of Ventilation System of
Underground Interchange at
Jianning West Road, Nanjing, China
[J]. Tunnel Construction, 2021
, 41(S2)
: 462
-468
.
DOI: 10.3973/j.issn.2096-4498.2021.S2.059
