The smoke exhaustion and disaster prevention and
rescue of submarine immersed tunnel with ultralarge
crosssection is difficult to carry out. Therefore, a
new smoke exhaustion system combining horizontal smoke exhaust connection
channel on tunnel top with sidewall smoke exhaust hole is innovatively proposed
for immersed tunnel of ShenzhenZhongshan Link under
the condition that the full sidewall smoke exhaustion mode cannot meet
requirement, which help to solve the smoke exhaust difficulty of superlong and large immersed tunnel. The new smoke exhaustion system is
superior to the traditional full sidewall smoke extraction method in terms of
use of the smoke flow characteristics, smoke exhaust efficiency, available
evacuation time, and the fire safety of superlarge
crosssection submarine immersed tunnel. Furthermore, a
smoke exhaust scheme for the interconnection area of the underwater hub is
proposed based on the characteristics of the interconnection structure of the
underwater hub and the characteristics of the ventilation flow field. By
adopting the scheme of longitudinal ventilation combined with ceiling exhaust
flue in the ramp section of the entrance confluence, and intensive smoke
discharge at the bifurcation and confluence positions or the vertical shaft,
the fire smoke can be effectively controlled. Under the condition of complete
disaster prevention facilities, a technical system for disaster prevention and
rescue of immersed tunnel of ShenzhenZhongshan Link is
established based on the traffic characteristics of the surrounding road
network and the distribution of rescue powers.
DENG Xiaohua
,
SONG Shenyou
,
CAO Zhengmao
,
ZHANG Qi
. Overall Scheme of Smoke Exhaustion System of Submarine
Tunnel of Shenzhen Zhongshan Link[J]. Tunnel Construction, 2020
, 40(8)
: 1176
-1184
.
DOI: 10.3973/j.issn.2096-4498.2020.08.010
