The authors employ data
research, theoretical analysis, and numerical simulation to develop a formula
for calculating evacuation speed within spiral tunnels and a prediction method
for evacuation time in high-altitude
regions. They also examine how geometric parameters of cross-channels influence evacuation speeds in spiral tunnels under varying
wind conditions, providing recommendations for cross-channel
design to ensure safe evacuation. The research findings highlight the
following: (1) Panic psychology, fire smoke, tunnel illumination, slope, and
altitude significantly affect evacuation speed. A method is established for
calculating evacuation speeds in spiral tunnels with steep longitudinal slopes
in highaltitude areas, incorporating these factors.
(2) A theoretical evacuation model is proposed for spiral tunnels under both
congested and non-congested conditions. This model
considers the worst-case scenario of a fire occurring
at the entrance of a vehicular cross-passage,
integrating the concept of zonal evacuation. (3) A performance-based analysis clarifies the impact of cross-channel geometric parameters on evacuation time, accounting for the
specific evacuation characteristics of external traffic tunnels in hydropower
projects. This analysis leads to recommended cross-channel
design parameters suitable for various ventilation wind speeds.
WANG Jian
,
CHEN Weitao
,
HUANG Peng
,
WU Xuezhi
,
YU Li
,
WANG Xue
,
LIU Yuan
,
LI Junqi
,
WANG Song
. Design Parameters for
Pedestrian Crossing in External Traffic
Spiral Tunnels of Hydropower Engineering[J]. Tunnel Construction, 0
: 186
-198
.
DOI: 10.3973/j.issn.2096-4498.2025.01.016
