Frontiers in Earth Science,
Год журнала:
2024,
Номер
12
Опубликована: Дек. 12, 2024
In
mountain-gorge
areas,
the
rock
creep
is
critical
process
for
high
slopes
failure.
During
long-term
creep,
might
encounter
earthquakes
and
form
further
after
earthquakes,
which
can
easily
lead
to
slope
Based
on
a
in
Nujiang
River
Basin,
deformation
dynamic
response
characteristics
are
analyzed
by
FLAC3D
software,
considering
combined
effects
of
multiple
creep.
Results
show
that
when
amplitude
increases,
shear
strength
decreases
risk
instability
increases
under
actions
earthquakes.
Earthquakes
promote
development
induce
accumulation
damage
surface
slope.
The
ground
motion
stronger
than
slope,
with
peak
occurring
at
top
have
greater
impact
middle
surface,
where
cumulative
crack
begin.
Vertical
has
great
effect
response.
resonance
leads
larger
PGA
amplification
factor
vertical
direction
horizontal
direction.
Nonlinear
damping
frequency
seismic
waves
cause
decrease
increasing
amplitudes.
This
study
could
failure
mechanism
provide
references
prevention
landslides
Basin.
Underground Space,
Год журнала:
2023,
Номер
16, С. 29 - 43
Опубликована: Ноя. 10, 2023
This
paper
conducts
a
theoretical
analysis
of
ground
settlements
due
to
shield
tunneling
in
multi-layered
soils
which
are
usually
encountered
urban
areas.
The
proposed
solution
is
based
on
the
general
form
Mindlin's
and
Loganathan-Poulos
formula
can
comprehensively
consider
in-process
parameters
including:
unbalanced
face
pressure,
shield-soil
friction,
tail
grouting
secondary
overloading
during
volume
loss.
method
verified
by
comparing
with
field
data
from
Qinghuayuan
Tunnel
Project
terms
surface
along
longitudinal
transverse
direction.
Due
local
settlement
or
heave
caused
certain
parameters,
calculated
using
current
direction
presents
an
irregular
S-shaped
curve
instead
traditional
curve.
Results
also
find
that
effect
pressure
cannot
be
ignored.
Scientific Reports,
Год журнала:
2024,
Номер
14(1)
Опубликована: Июнь 3, 2024
Abstract
Understanding
the
characteristics
and
distribution
patterns
of
initial
geo-stress
field
in
tunnels
is
great
significance
for
studying
problem
large
deformation
under
high
conditions.
This
article
proposes
a
ground
stress
inversion
method
level
determination
based
on
GS-XGBoost
algorithm
Haba
Snow
Mountain
Tunnel
Lixiang
Railway.
Firstly,
hydraulic
fracturing
used
to
conduct
on-site
testing
tunnel
obtain
data.
Then,
three-dimensional
model
will
be
established,
it
combined
with
regression
optimal
boundary
conditions
model.
Finally,
condition
parameters
are
substituted
into
finite-difference
calculation
calculation,
in-situ
entire
obtained.
determined.
The
results
show
that
increases
increase
burial
depth,
maximum
horizontal
principal
38.03
MPa
minimum
26.07
MPa.
has
problems
levels
I,
II,
III,
IV.
Level
III
IV
deformations
generally
accompanied
by
higher
(above
28
MPa)
smaller
surrounding
rock
strength.
strength
along
axis
shows
clear
"W"
shape,
opposite
surface
elevation
"M"
shape.
It
inferred
mountain
may
affected
geological
structures
both
sides
north
south,
causing
more
severe
compression
at
peak.
Water,
Год журнала:
2024,
Номер
16(3), С. 366 - 366
Опубликована: Янв. 23, 2024
This
study
focuses
on
the
seismic
safety
of
distributed
underground
reservoirs
in
coal
mines,
especially
scenarios
involving
establishment
multiple
within
same
mining
area,
spanning
different
seams.
Dynamic
similarity
model
tests
and
numerical
simulations
are
employed
to
investigate
construction
operation
these
under
extreme
conditions,
such
as
mine
tremors
or
earthquakes.
Utilizing
Daliuta
reservoir
a
case
study,
material
test
platform
is
established
represent
both
upper
lower
reservoirs.
Stability
conducted
interlayer
rock
mass
various
levels
intensity,
at
distances
comparatively
analyzed.
Meanwhile,
using
finite
element
method,
responses
intensity
simulated
with
conditions
tests.
Through
two
types
simulations,
mechanical
response
surrounding
influence
intensities
systematically
analyzed,
reasonable
between
obtained.
provides
valuable
scientific
insight
into
safe
design
embankments
mines.
