PILE
FOUNDATION
DESIGN
AS
PER IS
2911--2010
The
pile
code
consists
of
four
parts.
They
are
Part
1:Concrete
piles
Part
2:
Timber
Piles
Part
3:
Under
reamed
Piles
Part
4:
Load
test
on
Piles.
Out
of
these
Part
1
consists
of
four
section.
Among
these,
Section
1:
Driven
cast
in
situ
concrete
piles.
Section
2:
Bored
cast
in
situ
concrete
Piles
and
Section
3:
Driven
precast
concrete
Piles
are
revised
in
2010.
Some
of
the
important
changes
in
the
code
are
highlighted
as
follows:
Definitions
of
various
terms
have
been
modified
as
per
the
prevailing
engineering
practice.
Minimum
grade
of
concrete
to
be
used
in
pile
foundations
has
been
revised
to
M
25.
Design
parameters
with
respect
to
adhesion
factor,
earth
pressure
coefficient,
modulus
of
subgrade
reaction,
etc,
have
been
revised
to
make
them
consistence
with
the
outcome
of
modern
research
and
construction
practices.
Minimum
dia
of
bored
cat
in
situ
pile
have
been
changed
as
450mm
based
on
following
parameters:
Clear
cover
over
reinforcement Cl.6.11.4 50
x2 =
100mm
Dia
of
vertical
bar
minimum Cl.
6.11.4 12
x
2 = 24
mm
Helical
reinforcement
minimum
dia
cl.
6.11.4 8
x2 = 16
mm
Clearance
for
operation
of
Tremie
Cl.6.11.4 4
x20 = 80
mm
Dia
of
Tremie
pipe
minimum Cl.8.4
(c) =
200
mm
Total
dia
of pile
required =
420
mm
say
450mm
Provisions
for
special
use
of
large
diameter
bored
cast
in-situ
reinforced
cement
concrete
piles
in
marine
structures
have
been
added.
Procedures
for
calculation
of
bearing
capacity,
structural
capacity,
factor
of
safety,
lateral
load
capacity,
overloading,
etc,
have
also
been
modified
to
bring
them
at
par
with
the
present
practices.
Minimum
time
of
curing
before
handling
of
precast
piles
has
been
modified.
Provision
has
been
made
for
use
of
any
established
dynamic
pile
driving
formulae,
instead
of
recommending
any
specific
formula,
to
control
the
pile
driving
at
site,
giving
due
consideration
to
limitations
of
various
formulae.
Selection
of pile
foundation:
For
Poor
bearing
soils
such
as
Soft
clay,
Medium
Clay
or
any
clay
etc.
under
reamed
pile
foundation
with
pile
cap
and
grade
beam
or
Bored
cast
insitu
Pile
foundation
with
pile
cap
may
be
adopted.
For
clay
soil
with
G+2F,
G+3F,
silt+3floors
loads,
under
reamed
piles
with
pile
caps
connected
with
grade
beams
is
best
suited.
Very well written information. It will be supportive to anybody who utilizes it, including yours truly :). Keep doing what you are doing - i will definitely read more posts.Alexandr Shcolyar
ReplyDelete
ReplyDeleteIt is good article post thanks for sharing.
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