Transcript Document

II®
AM-LINER
INSTALLATION PROCEDURE
Charles A. Munson
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Introduction
This presentation is intended to
give an overview of the procedures
and techniques used to install the
AM-LINERII PVC pipeline
rehabilitation system.
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SEQUENCE OF EVENTS
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Pre-Installation closed circuit
television inspection
Pre-installation pipeline
preparation
Installation technique
Post-installation closed circuit
television inspection
Reinstatement of service
connections
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PRE-INSTALLATION CLOSED
CIRCUIT TELEVISION
INSPECTION
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Identify any conditions in the
pipeline that could impede or
prevent the proper installation of
the liner
Provide a record of the pre-lined
condition of the pipe
Accurately record the position of all
service connections
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PRE-INSTALLATION CLOSED CIRCUIT
TELEVISION INSPECTION
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A highly trained operator uses a
remotely controlled CCTV
camera to assess the condition
of the pipeline.
As the camera passes through
the pipeline, images from the
camera are monitored by the
operator and recorded either in
DVD or VHS format.
The operator makes a record of
the position of all service
connections and defects in the
pipeline.
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PIPELINE
PREPARATION
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Typical pipeline conditions that must be
remediated prior to lining:
Roots
Large quantities of groundwater
infiltration
Collapsed pipe
Dropped Joints or offsets of more than
12.5% of the inside pipe diameter
Protruding taps
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PIPELINE PREPARATION
ROOTS
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Roots must be
removed from the
pipeline prior to
installing the liner.
Roots may be
removed by using
a chemical root
treatment or by
mechanical
means such as
chain flails.
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PIPELINE PREPARATION
INFILTRATION
Large quantities of cold
ground water flowing into the
pipeline, can act as a heat
sink and prevent the PVC
liner material from reaching
the temperature needed to
form properly.
Infiltration may be eliminated
either by chemical grouting
or installing a patch prior to
lining.
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PIPELINE PREPARATION
COLLAPSED PIPE
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Collapsed pipe, dropped or offset joints
that reduce the inside circumference of
the pipeline to less than the outside
circumference of the pipe liner will not
allow the liner to form properly. This
condition is usually presented as a
longitudinal rib after the liner is
installed.
To avoid ribs in the liner, sections of
pipeline containing collapsed pipe,
dropped or offset joints should be point
repaired prior to lining.
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PIPELINE PREPARATION
PROTRUDING TAPS
Service taps that
protrude into the
pipeline more than
12.5% or 1-inch
should be cut off using
a chain flail or
remotely controlled
grinder.
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PIPELINE PREPARATION
CLEANING
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Prior to insertion of the
liner, the pipeline is
cleaned using a high
pressure water jet to
remove any debris in
the pipeline.
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LINER INSTALLATION
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Heating the coil of liner
Attaching the liner to the pulling
cable
Insertion of the liner into the host
pipe
Stress Relief
Processing the liner
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LINER INSTALLATION
The coil of AM-LINERII is brought to the
jobsite and loaded into an enclosed
trailer to be heated.
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LINER INSTALLATION
Preparing Pulling Nose
The pulling nose is made by folding the flat
liner in half longitudinally, drilling holes
perpendicularly through the folded liner, then
weaving a cable or chain through the holes.
The entire section is then wrapped with duct
tape.
The end of the liner is heated to make it
pliable.
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LINER INSTALLATION
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The coil of liner is
heated by steam in the
trailer.
The liner is heated until
it is as pliable as wet
leather.
Heating time will vary
depending on ambient
temperature, altitude
and steam quality.
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LINER INSTALLATION
A cable that has
been strung from a
winch at the
downstream
manhole, through
the pipeline to the
upstream manhole
is attached to the
pulling nose.
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LINER INSTALLATION
The liner is pulled into the host pipe either directly as shown
in the picture on the left or through the patented shaping
device shown on the right.
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LINER INSTALLATION
The speed at which the liner is inserted into
the pipeline is coordinated using two way
radio.
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LINER INSTALLATION
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The liner is pulled to
above ground level at
the downstream
manhole.
When the liner reaches
the maximum above
ground length allowed
by the pulley system the
winch is locked in that
position.
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LINER INSTALLATION
STRESS RELIEF
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The liner is cut off above ground
level at the upstream manhole.
A flow through plug with the steam
hose attached is inserted into the
end of the liner.
Steam under low pressure is
forced into the liner.
As the liner material heats
induced stress is relieved, this is
indicated by movement of the
liner.
This process continues until no
movement of the liner is observed.
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LINER INSTALLATION
STRESS RELIEF
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After all movement has ceased
at the upstream end, the
excess liner is trimmed and the
process plug installed.
The brake on the winch at the
downstream manhole is
released.
Steam is applied to the liner
through the plug at the
upstream manhole.
The stress relief process is
repeated for the downstream
end of the liner until all
movement has stopped.
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Upstream
manhole
Downstream
manhole
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LINER INSTALLATION
Processing
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After the stress relief process is
complete, the excess liner
material is cut away and a flowthrough plug installed.
The hose from the plug is
connected to the downstream
exhaust manifold.
The steam temperature and
pressure is monitored and
controlled at this process station.
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LINER INSTALLATION
Processing
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The liner is heated using low
pressure steam supplied by a
boiler at the upstream end.
Heating time is determined by
the length, and SDR of the liner.
Additional heating time may be
added by the installer if
warranted by conditions within
the host pipe.
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LINER INSTALLATION
Forming and Cooling
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At the end of the heating time the process
is switched from steam to compressed air.
The operator at the downstream manifold
quickly increases the internal pressure of
the liner causing it to expand and conform
tightly to the interior of the host pipe.
Internal pressure is maintained until the
exhaust air temperature has reached a
predetermined temperature.
Water may be induced into the
compressed air during the cooling process
to reduce the cooling time.
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POST INSTALLATION CCTV
INSPECTION
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After the liner has been
cooled, the flow through
plugs are removed and
the liner is inspected
using CCTV.
The operator inspects
the liner to make sure
that the it has formed
properly and that there
are no defects in the
liner.
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REINSTATEMENT OF
SERVICE CONNECTIONS
Services are reconnected using a remotely controlled robotic cutter
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REINSTATEMENT OF SERVICE
CONNECTIONS
CCTV
Camera
Robotic
Cutter
Cutter
Operator
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REINSTATEMENT OF SERVICE
CONNECTIONS
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In most cases the service
connection is located by
means of a pronounced
dimple in the liner.
When the dimple is not
clearly visible, the cutter
operator refers to the preinstallation inspection tape
and the previously recorded
position of all the service
connections.
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REINSTATEMENT OF
SERVICE CONNECTIONS
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Service connections are
reinstated using a remotely
controlled cutting device.
When reinstated the hole for the
connection must be smooth and
conform to the inside shape of
the old opening.
The hole must be a maximum of
105% and a minimum of 90% of
the service pipe diameter.
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FINISHING TOUCHES
The ends of the liner are neatly trimmed leaving one to one and
one half inches of liner extending into the manhole.
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II
AM-LINER
Installation advantages
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No refrigeration required for storage and transportation
No hazardous chemicals to mix
No noxious odors
The liner is manufactured in a controlled environment not in
the ground under unstable conditions
The installation process does not change the physical
properties of the liner material
Simple installation procedure
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