This study
addresses the problem of tunnel frost damage in highaltitude
and severely cold region based on relevant research. The current status of
research on tunnel frost damage is elaborated and analyzed from four aspects:
types and causes of frost damage, frost damage mechanisms, temperature field,
and treatment measures. The shortcomings of current research and future
development directions are explored. The main results include: (1) Through case
studies of tunnel projects in highaltitude and
severely cold regions, four types and four causes of frost damage are
summarized. (2) Based on four frost heave theories, including the theory of
frost heave in waterbearing weathered layer, the
theory of overall frost heave in surrounding rock, the theory of frost heave in
water behind the lining, and the theory of frost heave in fissure water, a
multitheory joint analysis approach is established.
This approach is primarily based on the theory of overall frost heave in
surrounding rock in the permafrost regions and the theory of frost heave in
fissure water in the seasonal frozen regions. (3) The research methods for
temperature field include onsite monitoring,
theoretical analysis, model test, and numerical simulation. Onsite monitoring refers to monitoring of temperature inside and
outside the tunnel, while theoretical analysis, model test, and numerical
simulation are used to validate and analyze the monitoring results. (4)
Measures for addressing frost damage include waterproofing and drainage
measures, thermal insulation and cold protection measures, and antifreezing measures. The key to preventing frost damage lies in
comprehensive treatment with the three types of measures. (5) The limitations
in the applicability of frost damage mechanisms, the current state of
temperature field research methods, and the effectiveness of treatment measures
are pointed out. In the future, a research system should be established to
comprehensively apply various frost heave theories and research methods in highaltitude and severely cold regions. Treatment measures should be
proposed in the aspects of tunnel waterproofing and drainage, thermal
insulation and cold protection, and frost resistance.
QIAO Xiong
,
YANG Xiaolong
,
FENG Yong
. Current Status and Prospects of Research on Tunnel
Frost Damage in Highaltitude and Severely Cold
Region[J]. Tunnel Construction, 2024
, 44(2)
: 233
-256
.
DOI: 10.3973/j.issn.2096-4498.2024.02.003
