|
|
 |
|
|
|
|
|
|
(cont.) |
REBUILDING
PROCESS
a) By-passes: These will be installed
if it is necessary to keep the water service active during
the repair period. Once the bypass is installed the corresponding
section will be shut off and repair works will begin.
During this time another bypass may be installed so that
as soon as one section is repaired another section can
be shut-off for repair and its flow diverted through a
bypass. This process is repeated until completion of the
project.
b) Access: In order to perform all cleaning
and rehabilitation works, it will be necessary to build
access paths to bring in the equipment. If necessary some
onsite digging will be performed to uncover the pipes.
c) Cleaning and resurfacing: The process
of cleaning and resurfacing will be done with specialized
equipment that will be introduced through the access paths
that were built for such purposes. The equipment may include
jacks, electric plants, cement-mortar mixers, pumps, etc.
The materials used include: washed sand, cement Portland
Class I, and water. The entire process will be conducted
by highly trained personal with extensive professional
experience in the field. The rehabilitated pipe can be
fully operational 48 hours after the repair and resurfacing
works are completed.
d) Regulations: All aspects related to
the rehabilitation process will be performed in accordance
with AWWA-C 602 norms.
OTHER CONSIDERATIONS
To address the problems caused by cast iron and steel
pipes with reduced water flow due to reduced diameter,
and loss of water due to leakage caused by oxidation,
we have two alternatives: Replacement and Rehabilitation.
Replacement: To replace the affected
pipe is an extremely expensive solution and requires the
excavation of the entire route of the pipe system.
Rehabilitation: This is a more affordable
process and provides the following benefits:
- Restored flow capacity
- Reduction of energy
and pumping costs
- Elimination of internal corrosion and
tuberculation
- Protection against future corrosion
and tuberculation
- Reduction of maintenance costs
- Elimination
of discoloration of water
- Avoidance of traffic congestion
-
Reduction of construction time
- Protection of your investment. |
|
| |
|
|
|
