emerging trends in the trenchless industry...9/15/2017 1 rizwan younis, phd, p.eng. mark knight,...
TRANSCRIPT
9/15/2017
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Rizwan Younis, PhD, P.Eng.
Mark Knight, PhD, P.Eng.
Emerging trends in the trenchless industry: what’s in it for me?
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Outline
Opportunities
Industry Trends
Trenchless Rehabilitation and
Replacement
Conclusions
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Opportunities
Aging Infrastructure
and
Urbanization
Cost and Environmental Considerations
Better Information
Education and Training
Acquire
Operate
Inspect & Maintain
Repair
Rehab
Replace
Asset Life Cycle
Aging Water Infrastructure
Drinking‐Water
• Poor and Very Poor
• 12%
• $25 billion
Wastewater
• Poor and Very Poor
• 13%
• $26 billion
Storm Water
• Poor and Very Poor
• 7%
• $10 billionSource: 2016 Canadian Infrastructure Report Card
http://canadianinfrastructure.ca/en/index.html6
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City of TorontoWater Distribution Pipes
Avg. Age: 55 yrs.About 24% over 80 years
old
Aging Pipelines
AgingPipelines
AgingPipelines
Photo courtesy of Jeff Pagett/ CTV Kitchener
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Source: Jen
nifer Pagliaro, Toronto Sun.
https://www.thestar.com/new
s/city_hall/2016/09/12/how‐torontos‐latest‐m
ega‐tower‐
got‐the‐green‐light.htm
l
Urbanization
Urbanization – Changing Landscape
Sou
rce:
Pra
pan
Dav
e, C
ity o
f T
oron
to.
Ow
ner’s
Per
spec
tive
-R
ehab
ilita
tion
Pro
ject
s fo
r T
runk
Sew
ers
and
Tra
nsm
issi
on M
ains
Challenging Locations
Environmentally Sensitive Areas
Sou
rce:
Pra
pan
Dav
e, C
ity o
f T
oron
to.
Ow
ner’s
Per
spec
tive
-R
ehab
ilita
tion
Pro
ject
s fo
r T
runk
Sew
ers
and
Tra
nsm
issi
on M
ains
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Growing Underground Infrastructure
Manhattan, N
ew York
Eric Swartley(2016) Ten questions to ask when
bidding excavation work.
http://excavationsafetyguide.com/guideP
DFs/ESG
_2016_P
age_6_7.pdf
Source: http://www.excavationsafetyguide.com/guidePDFs/2014_ESG_page_35_36.pdf#search="trenchless"
?Need better subsurface investigations to support trenchless design, means
and methods
?
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Trenchless Rehabilitation and Replacement
“A family of construction techniques for installing or rehabilitating underground
infrastructure with minimal disruption to surface traffic, businesses, and residents. Also includes technologies for inspection, leak location, and leak
detection with minimal disruption and minimal excavation from the ground surface.”
North American Society of Trenchless Technology (NASTT)
Trenchless Construction Methods
Trenchless Technologies
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Trenchless Rehabilitation Methods
Spray-on Lining
New Installations
Online Replacement
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Online Replacement
Pipe Bursting Pipe Splitting Pipe Slitting
Pipe Bursting
Pipe Bursting
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Online Replacement
Pipe Bursting Pneumatic or Static
Pneumatic
Static
Online Replacement
Pipe Splitting
• Metallic Pipes (Ductile iron, Steel)
• Plastic (PVC, HDPE)
Online Replacement
Pipe Slitting
Expandable Duct Puller Expander Head Slitter Head
Source: Andy Braithwaite
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Online ReplacementPipe Slitting
Pipe Slitting
Pipe BurstingLateral Replacement
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Pipe BurstingLateral Replacement
Pipe BurstingUpsizing Consideration
32
0-25%50-125%25-50%
Class A: Routine and generally considered favorable
Class C: Very challenging to
extremely difficult
Class B: Challenging to
moderately difficult
New Installations
NewInstallations
Non-SteeringMethods
SteeringMethods
MolingPipe RammingAuger BoringPipe Jacking
Microtunnelling
Horizontal Directional Drilling
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New InstallationsHorizontal Directional Drilling
Horizontal Directional Drilling
Fluid Assisted Mechanical Cutting• Mechanically cut soil/rock• Make slurry with drill fluids that carries
cutting out of bore• Applicable for mini and midi drill rigs used
for utility and municipal projects (less than 100,000 lbs pullback)
Fluid or Jet Cutting• Cut soil/rock with high pressure fluid jets• Common in large river crossings and large
rigs (greater than 200,000 lbs pullback)• Need high pressure to flow cuttings out of
bore
HDD Process Overview
• HDD Process
• Stage 1: Pilot bore
• Stage 2: Pre‐ream
• Stage 3: Product pipe installation
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Stage 1: The Pilot Bore
Stage 1: The Pilot Bore
Stage 1: The Pilot Bore
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Drill Bits for Hard Soil
Drill Bits for Cobbles
Rock Bits
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Mud Motors
• Drilling rock
• Developed from oil industry
• Contains gyro for steering
• Higher cost
• Indicate of the orientation of the drill head
• Information is used for steering and directional change• 12 O’Clock – upward• 3 O’Clock – right• 6 O’Clock – downward• 9 O’Clock – left
Clock Reference (Roll)
Sonde & battery
Pitch
• Indicate of the slope or tilt of the drill head
• In percentage (%)
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Walkover System
Tracking Systems
Locate Mode Screen (remote monitor to interpret the drilling data at the drill rig)
Wireline Tracking Systems
Wire to sonde
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Completed Pilot Bore
50
Pilot Bore Exit
Stage 2: Pre‐Ream/Back Ream
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Reamers
Swivels
Placed between reamer and product pipe
• Prevents product pipe rotation
• Want short swivel to prevent soil getting stuck between reamer and product pipe
Stage 3: Pipe Installation
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Back Reamer & Pipe Installation
Back Reamer & Pipe Installation
New InstallationsMicrotunnelling
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Microtunnelling
Source: HERRENKNECHT AG
MicrotunnellingDefinition
• A trenchless method of pipeline installation
• Remote Controlled• Non‐man entry (pipe dia < 1 m)
• Guided / Steerable• Accuracy 25
• Pipe Jacking
• Continuously Supported• Earth and hydrostatic pressures are
counterbalanced
• Applicable in wide range of underground conditions
MicrotunnellingShafts Sinking
• Drive Shaft• Size/Length (jacking frame+MTmachine or pipe length+thrust
block+entrance ring)
Thrust WallConcrete Slab
Entrance
Ring/Start up
Seal
Lean Concrete
Block
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MicrotunnellingImportant Considerations
• Application (pressure or gravity)
• Full site investigation report• Soil characteristics
• Water table
• Surface characteristics
• Other aspects of the project• Tunnel length and route/alignment
• Depth and diameter
• Pipe type
• Shafts
• Microtunnelling Equipment• Jacking frame; Tunnelling machine, Slurry system, Lubrication; Interjacks…
Microtunnelling
Feasible in a wide variety of ground conditions
Source: Pipe Jacking Association
MicrotunnellingImportant Considerations
Design of machine,
means and methods
Success of project
Geotechnical
Constraints
Tunnel alignment, gradient Type of machine (shielded, non shielded) Face support (Slurry, Mix, EPB)
Slurry mode: composition of the slurry
EPB: Foam injection capabilites Rock TBM: Rock stabilization
(anchoring etc.) Cutting wheel design (opening ratio etc.) Cutting tools: selection and arrangement Cutting tools: inspection procedure Soil conditioning and soil stabilisation Soil removal (pipes, muck cars, belt
conveyors) Potential of obstacles and removals ….
Adapted from Lang (2015) Microtunneling Process and Equipment, HERRENKNECHT
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Drive Shaft
Reception Shaft
Breakthrough
Microtunnelling Animation
Source: HERRENKNECHT AG
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History
• Invented in the UK in 1971
• First project in Winnipeg in 1978
CURED‐IN‐PLACE PIPE (CIPP)
Components
• Tube
• Thermosetting Resin
• Installation and Curing Process
CIPP Tube
• One or more layers of flexible needled felt, or
• An equivalent nonwoven or woven material, or
• a combination of nonwoven and woven materials
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Thermosetting Resins
Polyester
Sewer applications
Vinyl Ester
Industrial or special waste applications
Epoxy
Pressure applications
Odor sensitive projects
Installation
1. Pulled‐in‐Place
2. Inversion
CIPP INSTALLATION AND
CURING PROCESS
Curing
1. Hot water
2. Steam
3. Ultra Violet (for wastewater CIPP)
PULLED IN PLACE
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CIPP Installation Inversion Process
TRENCHLESS
REHABILITATION
PROGRAM SAVES
MONEY
Example – CIPP Sewer Renovation Program in
Winnipeg
• 1997 – 2012: 145 Km of CIPP
• $130 million savings
• 433 Km of pipe needs rehabilitation
• $390 million potential future savings
Source: C. Macey, K. Zurek, N. Clinck, A. Delaurier, and R. Sorokowski(2013). More really old CIPP liners from Winnipeg, MB, Canada that have stood the test of time. NASTT 2013 No‐Dig Show. Sacramento, California
OPPORTUNITIES
Education and Training
Lack of Trained Professionals
Lack of Contractors (water sector)
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Trends
Price Escalation
Industry Outlook
Technological Advancements
Utilities Price Trends
Source: Beecher, Institute of Public Utilities, MSU https://pdfs.semanticscholar.org/9209/5f350ff7ee9b0bfbd08e818ed22dcffe2b25.pdf
Source: Brendan Shapton, University of Waterloo
Inflation: 5.52% per annum
Inflation: 6.41% per annum
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“In order to accommodate escalating construction prices, Toronto Water has
modified the infrastructure renewal strategy for sewer infrastructure,
directing efforts towards trenchless rehabilitation rather than replacement of sewer infrastructure.”
Source:
Telecommunication Sector
Source: https://trenchlesstechnology.com/growth‐fiber‐trenchless‐benefits‐people‐become‐connected/prettyPhoto/0/
Source: Sharon M. Bueno, Making the Connection. Horizontal Directional Drilling Guide, http://www.trenchlesstechnology.com/pdfs/2015‐hdd‐sup.pdf
Smaller Footprint
Electric
Distribution
Power
Underground
Source: https://trenchlesstechnology.com/growth‐fiber‐trenchless‐benefits‐people‐become‐connected/prettyPhoto/0/
Source: Sharon M. Bueno, Making the Connection. Horizontal Directional Drilling Guide, http://www.trenchlesstechnology.com/pdfs/2015‐hdd‐sup.pdf
Natural Disasters
Old Power Line Replacements
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Energy
Infrastructure
Network of small‐diameter underground
pipelinesLarge pipeline projects
Geothermal
Installation
Source: http://www.easternairflow.com/geothermal.htmlSource: https://www.vermeer.com/documents/1/374/D20X22FXII_0410.pdf
Water, Sewer, and Stormwater
Rehabilitation and Replacement
New Development
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Trenchless Industry Advancements
• Industry is Evolving• New technologies to improve profits and productivity
• Better understanding of soils and drilling fluids• Same level of work with less horsepower and fuel consumption
• Advancements
• Long‐Distance Drives
• Curved Drives
• Drives in Rock
• Large Diameter Installations
Source: John Grennan and Marc Gelinas (2015). Microtunnelling Advancements in North America, Tunnelling Association of Canada
Technological Enhancements/Advancements
• HDD‐Plus or HDD Assist
• Pipe Ramming to assist HDD
• Microtunnelling
• Pipe Bursting (AC Pipes)
• Direct Pipe (HDD and Microtunnelling)
Technological Enhancements/Advancements
Conductor Barrel: Installation of casing pipes for HDD crossings
Pullback Assist (Support for pulling in steel pipes)
Source: TRACTO‐TECHNIK: http://www.tracto‐technik.com/hdd‐assist‐rescue‐45.html
HDD‐Plus or HDD Assist
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Technological Enhancements/Advancements
Drill Rod Recovery: Loosening of jammed HDD drill rods
Bore Salvage: Rescuing / Removing jammed product pipes
Source: TRACTO‐TECHNIK: http://www.tracto‐technik.com/hdd‐assist‐rescue‐45.html
HDD‐Plus or HDD Assist
Direct Pipe ®
Technology
Source: Gerhard Lang (2015). Microtunnelling Process and Equipment.
Technological Enhancements/Advancements
Technological Enhancements/AdvancementsDirect Pipe ® Technology
Source: Gerhard Lang (2015). Microtunnelling Process and Equipment.
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Technological Enhancements/AdvancementsDirect Pipe ® Technology
• No exit shaft required
• Pipe installed from one side
• Economical and fast
Source: Gerhard Lang (2015). Microtunnelling Process and Equipment.
PIPE CLEANINGTOMAHAWK SYSTEM
WATERMAIN RENOVATION
Tomahawk System(Envirologics, CATT, uWaterloo, Federal and Provincial Govts Collaborative R&D)
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Non‐Structural (Class I Lining)
FLOW RATE INCREASED BY 20%
PRESSURE DROP
DECREASED BY OVER 50%
WATERMAIN RENOVATION
Trenchless Industry Have Come a Long Way!Excerpts from NCHRP 242 Report (Year:
1997)
• Trend in the increased use of trenchless technologies
• No Department of Transportation (DOT) specification address all the techniques
• Almost all respondents have no or very little training in the application of trenchless techniques
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Conclusions
Growing Industry
• Urbanization
• Aging Infrastructure
• Environmental Concerns
Growing Acceptance
• Project Owners and
Municipalities
• Monetary Savings
Conclusions
Evolving Industry
New Technologies to
Improve Profits and
Productivity
Opportunities
• Open Cut vs. Trenchless
• Education & Training
• Improved Subsurface
Investigation and
Engineering Analysis
Contact InformationRizwan Younis, PhD, P.Eng.
Centre for Advancement of Trenchless Technology
University of Waterloo
200 University Ave. W.
Waterloo ON N2L 3G1
Tel: (519) 888‐4567 ext. 36189
Email: [email protected]
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