The
increase
in
air
temperature
and
humidity
caused
by
climate
change
the
Qinghai-Tibet
Plateau
changes
hydrothermal
state
of
closed
crushed-rock
embankment
(CRE)
due
to
infiltration
summer
rainfall,
which
is
closely
related
cooling
performance
layers
(CRL).
However,
CRL
under
rainfall
conditions
has
not
been
investigated.
Physical
models
were
conducted
explore
convective
properties
response
process
this
paper.
test
results
indicate
that
greatly
weakens
natural
convection
intensity
CRL.
By
contrast,
conditions,
cycle-average
exhibited
an
increasing
trend.
Based
on
thawing/freezing
index,
capacity
was
weakened
after
with
a
maximum
weakening
27.3%
compared
first
cycle.
In
addition,
pulse
subsoil
layer
experienced
step
gradual
decrease
concentrated
rainwater
infiltration.
After
experiencing
four
events,
volumetric
water
content
presents
upward
Overall,
infiltrated
brings
additional
heat
alter
CRE,
leading
effect
Case Studies in Thermal Engineering,
Journal Year:
2023,
Volume and Issue:
50, P. 103475 - 103475
Published: Sept. 9, 2023
The
freezing
strength
of
the
contact
interface
between
foundation
soil
and
infrastructure
has
been
a
key
difficult
problem
in
study
frost
jacking
piles
cold
regions;
previous
studies
have
focused
on
influence
law
experimental
factors
strength,
there
are
few
significance
effects
their
interactions
different
phase
transition
zones.
In
this
paper,
based
existing
test
data,
orthogonal
design
method
considering
interactions,
principles
range
analysis
variance
were
used
to
investigate
influencing
zones
interactions.
Finally,
new
for
establishing
prediction
model
multiple
linear
regression
was
proposed.
research
shows
that
significant
differences
established
by
can
better
reflect
variation
with
degree
factors.
Scientific Reports,
Journal Year:
2025,
Volume and Issue:
15(1)
Published: Jan. 13, 2025
The
thermodynamic
properties
of
frozen
soil
depend
on
its
temperature
state
and
ice
content.
Additionally,
the
permeability
coefficient
significantly
affects
both
distribution
water
movement.
In
this
study,
dynamic
variation
with
is
considered,
defined
as
a
piecewise
function
independent
variable,
hydrothermal
coupling
equation
established.
freezing
process
column
simulated
by
secondary
development
based
COMSOL
software.
calculated
outcomes
align
more
closely
experimental
results
when
accounting
for
gradient.
Notably,
calculation
accuracy
improves
heights
between
0
3
cm
8
to
15
cm,
difference
only
0.005.
On
basis,
taking
road
subgrade
in
cold
region
background,
boundary
conditions
are
revised
according
conclusion
6th
research
report
IPCC,
time-varying
law
characteristics
field
moisture
studied.
show
that
gradient
larger
within
2
m
depth
slope,
uniform
beyond
m,
there
permafrost.
With
increase
depth,
content
first
increases,
then
decreases
finally
tends
be
stable,
reaching
maximum
at
−
0.5
which
13%.
Atmosphere,
Journal Year:
2023,
Volume and Issue:
14(4), P. 620 - 620
Published: March 24, 2023
Thawing
permafrost
has
affected
the
structural
integrity
of
buried
warm
pipelines
in
cold
regions
and
poses
an
ongoing
threat
context
climate
change.
Therefore,
characterizing
variation
engineering
properties
pipeline
foundation
its
effect
on
mechanical
behavior
is
important.
In
this
paper,
ground
temperature
distributions
around
a
response
to
differential
thaw
settlement
are
investigated
using
thermal–mechanical
sequential
coupling
simulation,
based
observational
data
collected
from
selected
monitoring
site
along
China-Russia
crude
oil
northeastern
China.
The
results
indicate
that
thaw-induced
develops
quickly
with
formation
expansion
bulb
first
10
years,
then
increases
slowly
when
extends
weathered
granite.
Differential
will
cause
significant
change
deformation
stress
near
interface
strong
weak
zones.
When
length
ratio
zones
1,
maximum
thickness
16
mm
approximately
45%
allowable
X65
steel,
remains
safe
for
30
years.
However,
potential
failure
should
be
considered
due
continued
thawing
warming
pipe
material
aging.
Forthcoming
research
topic
needed
evaluate
more
carefully
regions.
Case Studies in Thermal Engineering,
Journal Year:
2023,
Volume and Issue:
51, P. 103610 - 103610
Published: Oct. 10, 2023
The
traditional
crushed-rock
embankment
(CRE)
has
proven
to
be
one
of
the
most
successful
cooling
structures
during
operation
Qinghai-Tibet
Railway.
However,
it
remains
untested
whether
or
not
CRE
can
maintain
stability
permafrost
foundation
under
expressways
strong
heat
absorption
asphalt-pavement
and
climate
warming.
For
study,
field
tests
were
performed
evaluate
performance
in
wider-width
expressways.
Then,
A
transfer
model
was
established,
a
novel
inverted
"M"-shaped
(MCRE)
proposed.
Finally,
large
numbers
numerical
simulations
further
comparatively
thermal
behavior
performances
for
both
MCRE
expressway
construction.
study
shows
that
(1)
accelerates
degradation
rate
CRE;
(2)
obvious
sunny-shady
slope
effect,
which
cannot
guarantee
expressway;
(3)
increases
entry
energy
therefore
dissipation
from
foundation;
(4)
improves
long-term
expressway.
research
could
provide
important
technical
reference
construction
areas
future.
