To explore reasonable
schemes for the evacuation platform of metro shield tunnels in scenarios such
as fire, flood, and train section failure, a Pathfinder evacuation simulation
model is established to evacuate 1 460 people from 6 B-type metro cars. First, the shortest evacuation time, evacuation
completion time, and evacuation rules of personnel in the carriage are examined
across four evacuation platform layout schemes. Subsequently, using the optimal
"four-way passage" scheme as an example, the
shortest evacuation time, evacuation completion time, and evacuation rules of
personnel in the carriage across seven evacuation platform widths are studied.
The results demonstrate the following: (1) Evacuation of carriage passengers
occurs in three stages: rapid evacuation, slow evacuation, and personnel
emptying. Evacuating passengers from the carriage is the most critical step in
escaping danger and constitutes a large proportion of the entire evacuation
time, necessitating the organization and guidance of passengers. (2) The "four-way
passage" structure adopted at the connection gallery can optimize
communication between the evacuation platform and the track bed without
interrupting the evacuation platform. Its double-layer
functionality achieves evacuation through the lower track bed during fires and
via the longitudinally connected upper evacuation platform during floods. (3)
Increasing the width of the evacuation platform significantly reduces passenger
evacuation time with minimal impact on evacuation completion time. The width of
the evacuation platform below 1 100 mm has minimal impact on evacuation time.
(4) Smooth design of the evacuation platform in connection galleries, track
beds, civil air defense doors, flood prevention doors, and turnout areas is essential.
YANG Peng
,
ZHOU Yong
,
ZHAO Pinxiang
,
ZHU Honghai
,
WANG Hujia
,
WANG Baofeng
. Optimization of Metro
Shield Tunnel Evacuation Platform Based on Pathfinder[J]. Tunnel Construction, 2024
, 44(7)
: 1502
-1509
.
DOI: 10.3973/j.issn.2096-4498.2024.07.016
