High ground temperature tunnels are often accompanied
by hightemperature heatharms, i.e. poor working
environment, frequent machinery malfunctions, low labor productivity, etc.
Hence, a series of temperaturelowering solutions are
studied and compared for #1 inclined shaft in Gaoligongshan Tunnel of DaliRuili Railway. First, the hot water sources are analyzed, the
meteorologic conditions in and out of tunnel are monitored, and the ventilation
measures are strengthened to improve the comfort degree of human body. Second,
the heat dissipation is reduced by grouting sealing the hot water sources, and
further to effectively control the temperature and humidity of environment.
Third, the ice cubes and jet fans are adopted to speed up heat exchange and
absorb heat energy, so as to decrease ambient temperature. Fourth, the
mechanical cooling method by using refrigerating equipments is adopted to
reduce the temperature inside the tunnel. Fifth, the resource allocation
measures, i.e. increasing the number of workers and equipments, shortening the
working hours of workers and equipments, and schedule shift work, are
comprehensively optimized. Finally, the effects of these cooling measures are
analyzed, and the analytical results show that the combination of ventilation,
grouting sealing, mechanical cooling and rational construction organization can
reduce and even eliminate heat harms induced by high ground temperature in
tunnel with surrounding rocks and hot water as heat sources.
LI Jiangao
,
LIU Yafei
. Study on Comprehensive Cooling Technology for High
Ground Temperature in Long and Large Inclined Shaft of
DaliRuili Railway[J]. Tunnel Construction, 2020
, 40(10)
: 1498
-1505
.
DOI: 10.3973/j.issn.2096-4498.2020.10.014
