Tunnel Liners, Relines and Rehabilitation

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© 2013 Armtec Infrastructure Inc. • Confidential & Proprietary
Webinar
TUNNEL LINERS, RELINES
& REHABILITATION
May, 2014
Patrick Biro, P.Eng.
Dave Groot

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Email Your Attendance List:
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• Email
webinars@armtec.com
Will send certificate

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YOUR HOSTS
Business Development Engineer,
Western Canada
• Patrick completed his Bachelor’s Degree in
Civil Engineering at McMaster University in
April of 2001.
• Patrick has more than 10 years of
experience with the design of buried steel
structures.
• Patrick is currently one of Armtec’s regional
Business Development Engineers for
Western Canada .

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YOUR HOSTS
Dave Groot
Senior Sales Representative,
Central Canada
• Dave has 20 years experience with Drainage
Products and 14 years as a Sales
Representative with Armtec’s Drainage
Solutions based in Ontario.

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• 43 locations in Canada
• Approximately 2,000 employees
• Exceptional product range for:
Armtec is a leading global infrastructure
and construction materials company.
Rail & Road Infrastructure
Ports & Marine
Land Development
Mining & Energy
Forestry
Agriculture

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Bridge Materials
Drainage Solutions
and Water Treatment
Landscaping
Products
and Amenities
Noise Control
Road and
Highway Safety Soil Retention
Underground
and Utilities
Precast Concrete
Buildings and
Venues
Precast Concrete
Garages and
Parkades

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PRESENTATION OUTLINE
1. Trenchless concepts
• Tunneling
• Relining
2. Trenchless solutions by Armtec
• Structural plate
• Metal pipe
• Plastic pipe
• Spiral wound pipe

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Tunnel Liners, Relines & Rehabilitation
1. TRENCHLESS CONCEPTS
TRENCHLESS BY ARMTEC

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TRENCHLESS CONCEPTS
• Trenchless construction is a subsurface installation that
does not require open cut excavation
• Trenchless technology can be used for:
1. New construction (tunneling)
2. Rehabilitation (relining)

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TRENCHLESS CONCEPTS
• Trenchless technology is a growing industry due to the
many benefits vs. open-cut excavations
• Aging infrastructure is also putting a demand on
replacement and rehabilitation of existing structures
• More than half of Canada’s infrastructure is
40+ yrs. old
• Almost a third of Canada’s municipal water
infrastructure is approaching its service life
(FCM – 2007).
(Tarek et al.- 2003).
a
b
a
b

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Trenchless
TRENCHLESS CONCEPTS
Open Cut
Vs.

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Trenchless
• Minimal to no traffic or
business disruption
• Reduced impact to local
environment
• Excavation & hauling material
not required
• Minor to no impact to road
surface
• Worker safety improved
• Trenchless is green
TRENCHLESS CONCEPTS
Open Cut
• Reduced or re-routed traffic;
disruption to local business
• Impact to local environment
(dust, silt, other contamination)
• Potentially high cost of
excavation, hauling
• Disturbed road surface affects
pavement quality
• Worker safety at greater risk
Vs.

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TRENCHLESS CONCEPTS
Trenchless is Green
• Trenchless eliminates the
need of running excavation
equipment
• Trenchless eliminates the
need for moving and hauling
excavated material
• Overall reduction in
equipment/vehicle emissions

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TRENCHLESS CONCEPTS
Tunneling
• Tunneling is a subsurface excavation commonly used for
new construction in mining & infrastructure applications
• Tunnels can be constructed using a wide variety of
trenchless technologies including:
• Steel liners
• Precast liners
• Sprayed concrete (shotcrete)
• Pipe jacking

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TRENCHLESS CONCEPTS
Tunneling
• Tunneling typically involves a staged excavation &
installation process:
1. Excavate tunnel as allowed per soil conditions
2. Install rings of liner
3. Pump grout between liner and excavated tunnel
Voids must be filled to perform as a structural liner
4. Repeat steps
• Geotechnical or tunneling engineer is required
• Contractor experienced in tunneling is recommended

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TRENCHLESS CONCEPTS
Tunneling
Armtec Tunnel Liner Plate tunnel installations.

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TRENCHLESS CONCEPTS
Tunneling
• Tunneling can also include vertical shaft construction
Armtec Tunnel Liner Plate shaft installations.

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TRENCHLESS CONCEPTS
Relining
• Relining is the installation of a new surface to an existing
structure to provide either a facial or structural
restoration
• Aging tunnels or culverts experiencing
cracking, spalling, or corrosion may require a new
surface to prevent further deterioration
• Deteriorated structures in danger of failing may require a
fully structural reline

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TRENCHLESS CONCEPTS
Relining
• Culvert relines typically involve a sliplining process:
1. Slide coupled or pre-assembled pipe liner into the
existing pipe
2. Utilize bracing or blocking to hold structure into
place
3. Pump grout between new and existing structure
Voids must be filled to perform as a structural liner
• Flanged liner plates can be assembled in place*

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TRENCHLESS CONCEPTS
Shop-installed screw-jacks used for bracing.Sliding CSP reline pipe into
place.
Relining

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TRENCHLESS CONCEPTS
Relining
Installation crew injecting grout through shop-installed grout
ports.

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Tunnel Liners, Relines & Rehabilitation
2. TRENCHLESS SOLUTIONS
BY ARMTEC

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TRENCHLESS SOLUTIONS
Pipe & Culvert Solutions
Open Cut – New or
Replacement
Trenchless
Tunneling – New
construction
Relining -
Rehabilitation
Tunnel Liner Plate
Various Armtec
pipe & culvert
solutions Structural Plate
CSP grouted liner
HDPE & PVC
grouted liner
Spiral-wound

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PLASTIC
• BOSS 2000
• DuroMaxx
• A2 Liner Pipe
• Spiral Wound
• InnerFlow
TRENCHLESS SOLUTIONS
METAL
• Structural Plate
• Corrugated Steel Pipe

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STRUCTURAL PLATE
Multi-Plate
Tunnel Liner Plate
Polymer-coated Multi-Plate reline of
existing Multi-Plate - before.
Aluminum Tunnel Liner Plate reline of
existing Multi-Plate - before.

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STRUCTURAL PLATE
Multi-Plate
Tunnel Liner Plate
Polymer-coated Multi-Plate reline of
existing Multi-Plate - after.
Aluminum Tunnel Liner Plate reline of
existing Multi-Plate - after.

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STRUCTURAL PLATE
Multi-Plate
• Bolted corrugated plate
• Assembled outside & slip-lined
• Grouted in place
• Structural liner
• Reline drainage pipe, water
crossing structures
• Standard round, elliptical, arch
shapes
Tunnel Liner Plate
• Bolted 2-flange liner plate
• Assembled from the inside
• Reline drainage pipe & water
crossing structures
• New construction of tunnels
and shafts
• Wide variety of custom shapes

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STRUCTURAL PLATE
Multi-Plate
Tunnel Liner Plate
Multi-Plate being assembled outside of
existing structure, prior to sliplining.
Lift equipment inside Tunnel Liner Plate
structure during assembly.

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TUNNEL LINER PLATE
2-Flanged liner – Armtec Tunnel
Liner Plate.
Pressure-grouting via shop-installed grout ports.

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TUNNEL LINER PLATE
Liner plate being assembled inside existing
culvert.
View of bracing required for assembly &
grouting.

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STRUCTURAL PLATE
• Galvanized steel
• Polymer-coated steel
• Aluminum
Galvanized steel plate. Strata-CAT polymer-
coated steel plate.
Aluminum plate.

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TUNNEL LINER PLATE
• Custom shapes
• Open-bottom structures
Facial reline of archway. Structural reline of CIP concrete
structure.

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TUNNEL LINER PLATE
• More custom shapes!

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TUNNEL LINER PLATE
Creek Reline; Huron County, ON
1900mm span TLP Arch
Design Challenges:
• Deteriorating structure with bend in it
• Hydraulic capacity
Solution:
• Tunnel Liner Plate reline
• 31 meters of 1900mm span x 900mm rise
• Shop-fabricated elbow included
Full Engineering Support:
• Full structural reline w/ grouting lift recommendations
Outcome:
• Tunnel Liner Plate selected for constructability
• 1200mm jacked pipe offsets loss in hydraulic capacity

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TUNNEL LINER PLATE
Creek Reline; Huron County, ON
TLP Arch
View from inside of Tunnel Liner Plate reline.

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CORRUGATED STEEL PIPE
Hel-Cor
Ultra Flo

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Hel-Cor
• Corrugated steel
• Reline drainage pipe
• Round & arched pipes
Ultra Flo
• Spiral rib
• Reline drainage pipe
• Round pipes
• Superior hydraulic properties

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ULTRA FLO
• Available in 450-2600 mm dia.
• Smooth inner wall has improved
hydraulic properties
• Manning’s n = 0.013
(Comparable to concrete pipe)
Example:
• Reline existing 1200 mm CSP
with 1000 mm Ultra Flo
• Achieve 95% of existing flow
View from inside of spiral rib pipe.

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ULTRA FLO
Triple Reline; North Vancouver, BC
1200mm dia. Ultra Flo
Design Challenges:
• Aging pipes in need of repair
• Open-cut excavation not possible
• Reduced hydraulic capacity
Solution:
• Ultra Flo reline
• 3 runs of 1200mm dia. pipe
• End treatments beveled
Outcome:
• Ultra Flow pipe selected for smooth inner wall
• Concrete ends beveled to improve hydraulics
• Minimized impact on hydraulic capacity

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ULTRA FLO
Triple Reline; North Vancouver, BC
1200mm dia. Ultra Flo
Full view of triple Ultra Flo reline.

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• Galvanized steel
• Aluminized (Type 2) steel
• Polymer-laminated steel
(Hel-Cor only)
Galvanized. Aluminized Type 2
(ALT2).
Trenchcoat polymer-
laminated.

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HDPE & PVC
High Density Polyethylene (HDPE)
& Polyvinyl Chloride (PVC)
• Long service life (100+ yrs.)
• Highly immune to corrosion & resistant chemical attack
• pH range of 2 - 12
• Resistant to abrasion (HDPE is the best!)
• Lightweight (high strength-to-weight ratio)

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• 6 m standard length
• Smooth inner wall
• Bell & gasket joints (75 kPa)
BOSS 2000
• Corrugated HDPE pipe
• Slip line installation
• Reline small dia. storm sewer
& drainage pipe

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DUROMAXX
• Steel-reinforced HDPE pipe
• Galvanized steel ribs
completely encapsulated in
HDPE layer
• 4.27 m & 6.7 m std. lengths
• Bell & gasket joints (75 kPa)
up to 1800 mm dia.
• Welded joints (100 kPa)
available in larger diameters

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DUROMAXX
• Low-profile ribs reduces OD
• Reline sanitary sewer, storm
sewer & drainage pipe

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DUROMAXX
Simms Creek Reline; Campbell River, BC
3000mm SRPE
Design Challenges:
• Rapid installation
• Existing culvert condition
Solution:
• DuroMaxx Reline Pipe
• 26.2 meters In 3000mm diameter
Full Engineering Support:
• On-site installation support
Outcome:
• Materials RFP and engineering and financial
comparison review
• DuroMaxx Technology selected

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DUROMAXX
Simms Creek Reline; Campbell River, BC
3000mm SRPE
DuroMaxx pipe being slid into place.

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A2 LINER PIPE
• Corrugated PVC liner pipe
• Similar benefits as with HDPE
• Very low-profile corrugation
minimizes OD
• Reline sanitary sewer & storm
sewer pipe
• Available in 3 m & 6 m lengths*

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• STAB-JOINT water-tight
connections (75 kPa) – rated
for sanitary sewers
A2 LINER PIPE
• Joints maintain constant inside
& outside diameter

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Example:
• Reline existing 1200 mm
CSP with 900 mm A2 Liner
• Achieve 103% of existing flow
A2 LINER PIPE
• Ideal for maintaining hydraulic
capacity

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SPIRAL WOUND
• Spiral, machine wound trenchless pipe rehabilitation
• Winding machinery may be lowered into manholes & other
tight spaces
• Pipe is wound & fused in place, feeding into the existing pipe

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SPIRAL WOUND – SPR PE
• SPR PE, spiral wound steel-reinforced HDPE pipe liner
• All the benefits of steel-reinforced HDPE pipe (DuroMaxx)
• Can be installed in live flow conditions
• Continuous welding
creates seamless pipe
• 750 - 3000 mm dia.

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SPIRAL WOUND – SPR EX
• SPR EX, spiral wound, self-expanding PVC pipe liner
• Wound with an interlocking profile
• Expands in place against the ID of the existing pipe
• 150 – 900 mm dia.

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INNERFLOW
• Solid, smooth-wall HDPE pipe
• Male/female jointing system
• 200 – 1600 mm outside dia.
• Custom shapes & lengths (up to 15 m) available

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SELECTION CRITERIA
• Size & shape
• Hydraulics
• Durability
• Service life
• Abrasion
• Constructability
• Slip-lining
• Inside assembly
• Grouting
• Cost

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Liner Type Material Service
Life*
Sizes (dia.) “n”
Tunnel Liner
Plate
Galv. steel
Aluminum
Polymer-coated steel
50 yrs.
75 yrs.
100 yrs.
1300 mm + 0.034
Ultra Flo Galv. steel
ALT2
50 yrs.
75 yrs.
450 – 2600 mm 0.013
Boss 2000 Corrugated HDPE 100 yrs. 100 – 900 mm 0.012
DuroMaxx Steel-reinforced HDPE 100 yrs. 750 – 3000 mm 0.012
A2 Liner Pipe Corrugated PVC 100 yrs. 300 – 900 mm 0.009
SPR HE Steel-reinforced HDPE 100 yrs. 750 – 3000 mm 0.010
SPR EX Spiral-wound PVC 100 yrs. 150 – 900 mm 0.010
InnerFlow Solid-wall HDPE 100 yrs. 200 – 1600 mm 0.009
TRENCHLESS COMPARISON
*IN IDEAL SITE CONDITIONS.

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Stormwater Management
QUESTIONS?
STORMWATER MANAGEMENT

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UPCOMING MONTHLY WEBINARS
Monthly Webinars for Armtec
Drainage Solutions:
www.armtec.com/webinars/
Upcoming:
May 15, 12pm EST | Insulated Precast
Wall Panels
Shane Sherar
Ebi Moradi, P. Eng
STORMWATER MANAGEMENT

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For more information
CALL 1-877-5-ARMTEC OR
VISIT ARMTEC.COM
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Dave Groot
Senior Sales Representative
Armtec
T: (519) 763-2360
C: (519) 982-0721
dave.groot@armtec.com
Business Development Engineer
Armtec
T: (604) 343-2740
C: (604) 365-2448
patrick.biro@armtec.com

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