Physics of Fluids,
Journal Year:
2024,
Volume and Issue:
36(12)
Published: Dec. 1, 2024
Local
scour
induced
by
strong
currents
has
become
one
of
the
major
challenges
for
sea-crossing
bridges
built
convenience
transportation
across
bays.
To
mitigate
local
bridge
foundation,
this
study
optimized
design
and
geometry
upper
part
skirted
caisson
proposed
a
new
type
foundation
called
with
two
tandem
piers
(SCTTP).
Systematic
experimental
numerical
investigations
into
influence
parameters
SCTTPs
on
protection
were
conducted,
temporal
development
mechanism
in
investigated.
The
following
conclusions
can
be
drawn:
(1)
although
SCTTP
is
slightly
greater
than
that
caisson,
terrain
more
stable;
(2)
circular
small,
flat
surfaces
semicircular-ended
square
intensify
scour;
(3)
at
front
back
gradually
becomes
independent
distance
between
piers,
causing
total
to
increase;
(4)
as
width
tie
beam
decreases,
groove
significant
no
groove,
but
depth
little
effect
maximum
groove.
These
findings
provide
insight
optimization
from
scour.
Advances in Bridge Engineering,
Journal Year:
2024,
Volume and Issue:
5(1)
Published: April 17, 2024
Abstract
Cofferdam
is
widely
employed
in
the
construction
of
underwater
bridge
foundations.
Its
crucial
attribute
lies
providing
a
dedicated
platform
for
activities
and
enhancing
water
resistance
dimensions
structural
design,
consequently
amplifying
local
scour.
However,
previous
research
on
scour
has
seldom
investigated
effect
facilities
life
cycle
development
This
gap
led
to
misunderstanding
protective
strategies
against
throughout
period.
In
this
paper,
experiment
was
implemented
with
unidirectional
flume.
Physical
model
experiments
were
conducted
scrutinize
impact
anti-scour
rib
structures
The
experimentally
determined
depth
compared
assess
performance
protection
system.
Oblique
photogrammetry
subsequently
used
capture
morphology
equilibrium
pit
experiments.
associated
topographical
data
imported
into
Fluent
commercial
fluid
software
in-depth
flow
field
analysis.
A
numerical
flume
established
examine
hydraulic
characteristics
under
two
distinct
conditions:
smooth
riverbed
during
initial
stage
scoured
at
To
further
determine
mechanism
protection,
influence
shear
stress
numerically.
Analyses
revealed
that
incorporating
ribs
cofferdam
alters
characteristics,
hindering
downward
movement
subsurface
beneath
structure,
reducing
bed
stress,
mitigating
effects.
instantaneous
strengthens
as
topography
develops.
effectiveness
mainly
influenced
by
length,
spacing,
shape.
