Freezing damage causes tunnel structure diseases in
cold regions, which are not conducive to tunnel traffic safety. To prevent and
control frost damage in Guanshan tunnel, a new type of sideblow
air curtain insulation system for coldregion tunnels
is proposed. First, the control equation for air curtain barrier efficiency is
established, and the main design parameters of the system are optimized. Next,
an experimental system of airflow and temperature
fields in the thermal insulation device under the action of the air curtain is
designed and developed, and the variation laws of jet angle, jet wind speed,
external wind speed, and barrier efficiency are explored. The experimental
results reveal the following: (1) The optimal jet angle of the air curtain is
55°~75°. (2) The barrier
efficiency is inversely proportional to the external wind speed and directly
proportional to the jet wind speed. (3) The sideblow
air curtain insulation system has a good insulation effect and can effectively
prevent the occurrence of tunnel freezing injuries.
GUAN Xibin
. SideBlow Air Curtain Insulation System
and Model Test in ColdRegion Tunnels[J]. Tunnel Construction, 2022
, 42(10)
: 1720
-1728
.
DOI: 10.3973/j.issn.2096-4498.2022.10.006
