Page 7 - May-June2025 Vol 43 No 1

• Mitigated existing utility conflicts • Prevent infiltration and are approved and Davidson County Water Services
• Lessened impacts to affected by the Tennessee Department of Stormwater Division in Old Hickory.
homeowners and businesses Transportation (TDOT) Located in a suburban community
• Reduced site disturbance • Are compatible with 12" to 42" diameter approximately 15 miles northeast of
• Limited other major impacts that pipes (PVC fold and form process) Nashville, this project addressed joint
invariably occur when digging and • Address larger than 42" diameter pipes separation in a 24" reinforced concrete
replacing infrastructure. (SAPL approach) pipe (RCP), causing subsidence in
In addition to minimizing impacts on The following two recently completed adjacent homeowners’ properties.
existing properties, business operations, project examples demonstrate how Rehabilitating, as opposed to replacing
and traffic and pedestrian flow, valuable trenchless pipe rehabilitation provided the the pipe, prevented:
time also is saved by expediting project ideal solution for different city/county and • Conflicts with several existing utilities
completion timelines. state clients in Middle Tennessee. • Removal and replacement of driveways,
Specifics of Trenchless Pipe Rehabilitation Trenchless Solutions to Reduce curbs, and gutters
Walker Building Group’s PVC fold and Homeowner Impacts in Old Hickory • Lengthy homeowner and
form and cementitious SAPL processes: Walker Building Group’s pipe neighborhood traffic disruptions caused
• Conform to the existing host pipe, rehabilitation team recently completed by excavation.
including any changes in shape or a PVC fold and form project for the By using this approach, long project
dimension Metropolitan Government of Nashville duration/storm system upgrades were
completed in days, as opposed to weeks.
Compatible with 12-42" diameter pipes,
the PVC fold and form material that
Walker Building Group utilizes is TDOT-
approved. It contains no epoxy or resins,
and no harmful chemicals are released
during the steam curing process.
Trenchless Solutions to Mitigate TDOT
Roadway Impacts in Fairview
The pipe rehabilitation team at Walker
Building Group also recently utilized
SAPL to successfully deliver a TDOT
project in Williamson County. They found
that 58 LF of aging 72" corrugated metal
pipe (CMP) storm drain needed repairs to
address road settling along Highway 46 /
Pinewood Road in Pleasant View.
Pipe rehabilitation (as opposed to
replacement) prevented:
• An approximately seven-mile detour if
the road were closed for excavation
• Major impacts on neighboring
PINEWOOD: Pipe segment before, during and after homeowners and a rural community
(right) rehabilitation utilizing SAPL technology. dependent on Highway 46/Pinewood
Pipe and roadway repairs were completed in days, as Road as a vital route
opposed to weeks, using this method. This approach • A long project duration.
utilizes TDOT-approved A.W. Cook Cement Products to As a result, pipe and roadway repairs
rehabilitate pipes larger than 42" in diameter. were completed in days, as opposed to
weeks, using this method. This approach
utilizes TDOT-approved A.W. Cook
Cement Products to rehabilitate pipes
larger than 42" in diameter. The company
is a CEMTEC and Cook Brand Certified
Applicator, possessing demonstrated
capability and workmanship to install
Cook Brand rehabilitation products.
To learn more about how Walker
Building Group is leveraging trenchless
technology across Tennessee, please visit:
walkerbuildinggroup.com/piperehab,
call (615) 852-7095 or email piperehab@
walkerbuildinggroup.com.

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