Applied Sciences,
Год журнала:
2023,
Номер
13(19), С. 11102 - 11102
Опубликована: Окт. 9, 2023
Previously,
in
regard
to
tunnel
design
and
research,
the
focus
was
primarily
on
traffic
capacity
safety
requirements,
with
less
consideration
given
cave
landscape
its
impacts
drivers.
This
study
addressed
this
gap
by
proposing
a
comprehensive
evaluation
system
for
urban
driving
based
Analytic
Hierarchy
Process
(AHP)
theory.
Considering
information
perception
aspects
of
process
unique
characteristics
tunnels,
we
utilized
drivers’
biomass
as
an
index
layer
performed
simulation
using
machine
learning
algorithm.
The
proposed
model
validated
through
vehicle
field
tests
that
were
conducted
four
tunnels
along
substantial
amount
measured
data
obtained
during
experiments.
research
demonstrated
strong
correlation
between
body
index,
particularly
under
relevant
conditions,
which
revealed
interactive
relationship
parameters
biomass.
Furthermore,
analyzed
impact
degree
indicators,
offered
valuable
insights
into
designing
landscapes
perception.
Case Studies in Thermal Engineering,
Год журнала:
2024,
Номер
61, С. 104866 - 104866
Опубликована: Июль 20, 2024
Constant
high
temperature
conditions
in
tunnel
not
only
significantly
reduced
the
labor
efficiency
of
workers
but
also
affected
their
physical
and
mental
health.
However,
traditional
design
ventilation
cooling
for
geothermal
construction
considers
control
environment
ignores
thermal
comfort
state
workers,
which
will
increase
potential
risk
safety
accidents.
Therefore,
this
paper
adopted
methods
scene
testing,
theoretical
analysis
numerical
simulation
to
establish
a
modified
evaluation
model
applicable
tunnels.
By
analyzing
distribution
pattern
heat-sensitive
parts
engaged
different
intensity
under
air
supply
parameters,
strategy
high-temperature
tunnels
was
refined
on
basis
ensuring
that
meet
requirements.
The
results
show
parameters
satisfy
environmental
criteria
are
equally
adequate
worker
at
light-intensity
work.
when
ambient
is
higher
than
40
°C,
medium-intensity
work
still
does
requirements,
even
if
already
meets
criteria.
It
recommended
wind
speed
be
increased
by
least
8.3
%,
15.6%and
28.6
%
temperatures
45
°C
50
respectively.
More
effective
techniques
should
tried
further
enhance
heavy
workloads
especially
hot
environments
exceeding
°C.
A
comprehensive
understanding
of
airflow
temperature
distribution
within
high-temperature
tunnels
is
crucial
for
developing
effective
cooling
strategies
that
ensure
a
safe
environment
and
acceptable
construction
costs.
In
this
paper,
we
introduce
novel
strategy
integrates
thermal
insulation
layers
heat
exchangers
aligned
along
the
tunnel
axis
(TIL-HE
strategy).
We
investigate
variations
in
valid
ventilation
distance
(VVD)
compare
them
with
two
other
strategies:
natural
only
employing
mechanical
(NT
strategy)
featuring
(TIL
strategy),
through
3D
k-ε
turbulence
model
COMSOL
Multiphysics.
Our
findings
indicate
(1)
TIL-HE
demonstrates
superior
performance,
resulting
significantly
lower
temperatures
markedly
higher
VVD;
(2)
water
velocity
more
contribute
to
prolonged
(3)
positioning
surrounding
rock
rather
than
inside
layer
leads
even
longer
VVD.
Longitudinal-arranged
present
fewer
challenges
compared
traditional
radial-drilled
ones,
ultimately
reducing
These
provide
valuable
insights
optimizing
engineering
parameters
environments.
Buildings,
Год журнала:
2025,
Номер
15(2), С. 301 - 301
Опубликована: Янв. 20, 2025
As
a
typical
extreme
environment,
high-geothermal
environment
poses
severe
challenges
to
tunnel
construction
in
western
China.
In
this
paper,
thermal–mechanical
coupling
model
was
formulated
evaluate
the
cracking
behavior
of
lining
under
conditions,
considering
early
property
evolution
concrete.
This
further
validated
by
field
monitoring
and
analyzed
adjusting
relevant
parameters.
Results
indicate
that
higher
risk
occurred
on
external
surface
sidewall
after
24
h
casting.
With
increase
surrounding
rock
temperature,
duration
extended.
When
temperature
exceeded
68.7
°C,
thermal
insulation
measures
were
required
for
structure.
Notably,
superior
achieved
applying
sandwich
structure
rigid
polyurethane
materials
with
thickness
20–60
mm.
terms
curing
adopting
formwork
larger
heat
convection
coefficient
conducive
reducing
lining,
an
appropriate
removal
time
48
h.
work
provides
insights
into
concrete,
thereby
mitigating
its
environment.
