Operators manual
© 2017 Honeywell International Inc.
Operators manual underground gas pressure reducing station
Type: HON COCON 13
Page 19
4.1.1
‐
Soil
condition
and
foundation
Depending
on
the
composition
of
the
soil,
a
concrete
foundation
(plate)
under
the
station
may
be
needed,
to
prevent
the
station
from
sinking.
With
the
following
soil
compositions,
a
foundation
is
necessary:
‐
Organic
soil
compositions
such
as
peat,
humus
and
gardening
soil.
‐
Very
fine
‐
grained
soil
compositions
(clay
plates)
such
as
clay,
bolder
clay,
sandy
clay
and
compost.
We
also
advise
you
to
use
a
foundation
under
the
station
with
fine
grained
soil
compositions,
such
as
loam,
sandy
clay,
silt
and
loess.
Use
concrete
as
foundation
material.
A
foundation
is
not
necessary
with
moderate
rough
grained
soil
compositions,
such
as
sand,
gravel
sand,
wind
born
sand
deposit
and
sandy
plates.
The
foundation
must
be
at
least
50
millimeters
thick.
Ensure
that
you
do
not
only
consider
the
weight
of
the
station,
while
calculating
the
thickness
of
the
foundation,
but
also
consider
extra
weight.
(For
example,
the
placing
of
a
vehicle
on
the
pit
cover).
The
width
and
length
of
the
foundation
slab
must
be
a
minimum
of
1000mm
x1500
millimeters.
Ensure
that
the
top
of
foundation
plate
is
levelled.
4.1.2
‐
Pit
dimensions
The
pit
depth
depends
on
the
thickness
of
the
foundation.
To
determine
the
pit
depth
of
a
partially
exposed
in
‐
ground
station
(pit
cover
above
ground
level),
always
use
the
following
formula:
Depth
of
pit
=
906
+
d
f
Fill
in
the
thickness
of
the
foundation
d
f
in
millimeters.
The
number
"906"
is
the
distance
from
the
bottom
of
the
casing
to
halfway
up
the
pit
cover
frame.
The
result
‐
the
depth
of
the,
to
be
dug,
pit
‐
is
in
millimeters.
To
determine
the
pit
depth
of
a
ground
sunk
station
(pit
cover
at
ground
level),
always
use
the
following
formula:
Depth
pit
=
980
+
d
f
Fill
in
the
thickness
of
the
foundation
d
f
in
millimeters.
The
number
"980"
is
the
distance
from
the
bottom
to
the
top
of
the
casing.
The
result
‐
the
depth
of
the,
to
be
dug,
pit
‐
is
in
millimeters.
Example:
For
a
foundation
plate
(d
f
)
that
is
100
millimeters
thick,
the
pit
depth,
for
a
partially
exposed
in
‐
ground
station
is
906
+
100
=
1006
millimeters.
For
a
foundation
plate
(d
f
)
that
is
100
millimeters
thick,
the
pit
depth
for
a
station
equal
to
ground
level
is
980
+
100
=
1080
millimeters.
Dig
a
funnel
shaped
hole,
so
that
you
can
easily
attach
the
supply
and
discharge
pipes
to
the
casing.
Fasten
the
piping
‐
tension
free
‐
in
the
clamps,
which
are
attached
to
the
foundations.
Delivery
of
a
complete
foundation
‐
supplied
with
a
positioning
frame
for
the
casing
and
fastening
clamps
for
the
piping
‐
is
possible.