A novel three-dimensional printed refined scale model for tunnels in cold regions
is developed using a model test method to explore the freezing response
patterns of railway tunnel drainage systems in such regions and clarify key
points regarding the cold and frost resistances of such tunnels. This model
provides a complete and transparent drainage structure, enabling a visual
representation of the freezing process in tunnel drainage systems in cold
regions. Based on this model, a series of freezing response tests is conducted
for drainage systems under various temperature conditions. The following
results are drawn from this study. (1) The temperature field varies
considerably above the tunnel arch foot, with the maximum variation being
observed at the widest span of tunnel. By contrast, the temperature field below
the tunnel arch foot shows small variation, highlighting the important role of
the deep-buried central ditch. (2) Under all
temperature conditions, the freezing of the tunnel drainage system begins at
the side ditch, followed by the circumferential blind pipe. The transverse
guide pipe and central ditch do not freeze during tests. Furthermore, the
connection between the side ditch and circumferential blind pipe is identified
as a critical weak point for frost resistance; hence, insulation measures for
this area should be strengthened.
ZHENG Zefu
,
MA Weibin
,
GUO Xiaoxiong
,
TIAN Siming
,
XU Tianyuan
,
WANG Wei
. Freezing Patterns of
Railway Tunnel Drainage Systems in Cold Regions[J]. Tunnel Construction, 2024
, 44(9)
: 1792
-1798
.
DOI: 10.3973/j.issn.2096-4498.2024.09.008
