The distribution
characteristics of the temperature fields in extra-long tunnels in cold regions are closely related to natural wind
speed. A case study is conducted on a highway tunnel in western Sichuan in a
high-altitude area, and on-site
investigations, evaluations, and numerical simulations are used to examine the
influence of wind flow on the temperature fields of tunnels under construction
and penetrated and operating tunnels. The findings are as follows: (1) During
tunnel construction, mechanical ventilation significantly impacts the
temperature field in the tunnel, increasing the influence of cold air outside
the tunnel on the temperature field inside and extending the negative
temperature length in the tunnel. (2) Under unidirectional airflow, the
temperature field in the operating tunnel is low at the tunnel inlet end and
high at the outlet end. The longitudinal temperature field presents asymmetric
characteristics. (3) For long operating tunnels in cold regions, the cold wind
outside the tunnel does not affect the temperature field in the tunnel when
there is no wind or a gentle breeze. (4) When there is alternating airflow at
the tunnel entrance, the temperature in the penetrated tunnel is generally low
at the entrance and high in the middle area, and the longitudinal temperature
field frequently presents a parabolic shape.
WU Jian
,
ZHENG Bo
,
TAO Weiming
,
YUAN Ming
,
GUO Rui
. Influence of Wind Flow on
Temperature Fields of Extra-Long Tunnels in Cold Regions[J]. Tunnel Construction, 2024
, 44(9)
: 1762
-1770
.
DOI: 10.3973/j.issn.2096-4498.2024.09.005
