t03 river crossing-misterly
TRANSCRIPT
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Outline2
Outline
Backgroundg
Design Build Approach Project Development Project Development Design
C t ti Construction
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JEA3
7th largest utility in US 2nd largest in Florida North & South Grids TWMP- $80M Shift water to South Grid 6 Pipe Segments
K i i Ri C i Key portion is River Crossing Directional Drill
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River Crossing4
g Downtown Jax Directional Drill 36” diameter 6,572’ long 100’ below River 100 below River
Highly complex Aggressive schedule Chose Design-Build
Project Location – Jax, Florida
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RiverDrill RigDrill Rig Pipe Delivery
River
A Pipe Delivery & Staging
Pipe Assembly
HDD PipelineDrill Pilot Hole
B Drill Pilot Hole & Begin Pipe String Assembly
Pipe String Assembled
Ream/Swab HoleC
Ream/Swab Hole & Finish Pipe String Assembly
Drill Rig Pipe String Pulled
HDD PullbackD HDD Pullback
HDD PipelineInstalled Subaqueous Pipeline
E Installed Subaqueous Pipeline
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Drill Rig
Drill Pipe
Casing
D ill H d
Entry Pit & Mud Pit
Drill Head(See Blow-up)
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Drill Head
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Outline8
Outline
Backgroundg Design Build Approach Project Development Project Development Design
C t ti Construction
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Project Challengesj g Schedule – Jags, FL/GA Design – alignment,
diameter, length, drill path, FDOT, ROW, multiple curvesu p e cu ves
Construction – pilot hole, pipe assembly, pullback,
d lroad closures Permitting – ACOE, FDEP,
FDOT, City of JaxEverBank Stadium
FDOT, City of Jax
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Design Build Advantage10
Single point of accountability
Proper risk allocation
Early involvement of builder Early involvement of builder
Early involvement of specialized contractor
Schedule
Certainty of cost
Reduced claims
Unused allowances return to ownerUnused allowances return to owner
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JEA’s Decision Making Process11
Project Drivers Regulatory Capacity Needs Pr
oject
Drive
rs
Capacity Needs
JEA’s objectives Proper risk allocation
P
DELIVERYDELIVERY Predictability of Cost
Project Complexity Specialized engineering
DELIVERYMETHODDELIVERYMETHOD
p g g Specialized construction Challenging conditions Multi agency permitting Multi-agency permitting Environmental compliance Traffic impacts
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Risk Allocation MatrixDesign-Bid- Build (DBB) Progressive Design Build (DB)
Design and Construction Design Build Cost JEA Design-Builder
Design Defects JEA Design-Builder
Errors and/or Omissions JEA Design-Builder
Constructability JEA Design-Builder
Schedule/Completion JEA Design-Builder
Construction Warranties JEA Design-BuilderConstruction Warranties JEA Design Builder
Hazardous Materials JEA JEA
Unidentified Utilities JEA Design-Builder
Changing Soil Conditions JEA Design-Builder
Asset Management System Performance JEA Design-Builder
Life Cycle Costs JEA JEA
Operations and Maintenance JEA JEAp
Legal Third Party Litigation JEA JEA
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Selection Process13
Progressive Design Build
2 step selection process
Qualifications based Qualifications based Qualifications Packages
3 teams shortlisted
InterviewsInterviews Key personnel & approach
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JEA’s Procurement Documents14
Detail Get what you want
Pipe size Capacity Service life Schedule Submittal requirementsS q
Not so specific that you take on risk Geology Drilling method
Shared savings
Shift design/construction risk to DB Team
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Outline15
Outline
Backgroundg Design Build Approach Project Development Project Development Design
C t ti Construction
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Base Route16
2 HDDs
Open cut on Island
Environmental Impacts Environmental Impacts
Permitting challenges
Marine support
Frac out
Noise impact
Base Route
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Base Route17
2 HDDs
Open cut on Island
Environmental Impacts Environmental Impacts
Permitting challenges
Marine support
Frac out
Noise impact
Base Route
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Alternative Route18
Single HDD
Reduced Environmental Impacts
Reduced cost by $5M Reduced cost by $5M
Shorter schedule
Reduced permitting
Approach Evaluated multiple staging areas
Chose to use Arlington ExpresswayAlt route & pipe staging
Chose to use Arlington Expressway
Straight, but significant traffic impacts
Marine support
Frac out
Noise impact
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Outline19
Outline
Backgroundg Design Build Approach Project Development Project Development Design
C t ti Construction
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Design20
Survey, geotech, SUE
Route CurvesCurves
Staging
Pipe Assembly
Calculations Calculations Pull loads
Stresses
Operating pressures Operating pressures
Frac out calcs
PipeM t i l
Typical HDD Design
Material
Thickness
Coatings
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Design Summary21
6,572’ long
36” diameter, ¾ thick
60’ below River 60 below River
Epoxy coating
Powercrete coating
3,600’ max bend radius
Entry/Exit angles 8 & 10 deg
Two vertical curves Note bend radiusTwo vertical curves
Three horizontal curves
Cathodic protection systems (both sides)
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Pipe Assembly Planning22
Very challenging
6,572’ along AEW
Close coordination Close coordination Designers
Contractor
FDOT FDOT
Customized solution
Detailed schedule
Limited area for pipe string
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Pipe Assembly Planning23
3 Assembly Areas #1 – (2) 766 ft segments
#2 – (2) 1,000 ft segments
#3 – (2) 1,520 ft segments
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Assembly Plan for FDOT Assembly Plan for FDOT
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Outline25
Outline
Backgroundg Design Build Approach Project Development Project Development Design
C t ti Construction
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Pipe Procurement/Delivery26
Spec issued at 60% Design Step
Pipe arrived as design completed
40’ lengths
168 sticks
330 lbs/ft
2.2 M lbs2.2 M lbs
Pipe deliveryPipe delivery
Pipe manufacturing
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Pipe Assembly27
Welding
July – 12 hr/day; 6 dpw
All welds inspected X-ray
Ultrasonic
Linings/coatings repaired & tested
200 psi hydrostaic test
Pipe delivery
Pipe weld
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Temporary Casing28
60” steel
150’ each side
1” thick
Prevents Frac-out
Stabilizes pilot hole
Maintains drill angleMaintains drill angle
Grundoram
3 Trenchless Technologies HDDHDD
Pipe ramming
Jack and Bore
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Pilot Hole29
Intersect method
12.5” drill bit
East Rig – Atlas 440
West Rig – Hercules 1200
Reaming & Swabbing 27” reaming pass 27 reaming pass
36” reaming pass
50” reaming pass
S b Swab pass
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Final Pipe String Assembly30
Coordinate with Matthews Bridge Closure
Start Friday 7pm
2.5 days to complete
Move pipes from assembly areas
Create 1 pipe string
6,572’ long6,572 long
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Final Pipe String Assembly31
Elevate pipe to align with entry pit
100 ton cranes
Install coupling and pipe head
Install buoyancy line
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Pullback32
1.2M lb Rig - pulling
300 ton hydraulic thruster If pipe gets stuck
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Pullback33
Broke drill rods 2x
Impacts to traffic
Owner and DB Team worked together Developed recovery plan
Recover drill rod
Re-ream hole to 50”
Use thruster together with rig
Communicate with media
Successful pullback
N l i No claims
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Pullback34
Broke drill rods 2x
Impacts to traffic
Owner and DB Team worked together Developed recovery plan
Recover drill rod
Re-ream hole to 50”
Use thruster together with rig
Communicate with media
Successful pullback
N l i No claims
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Summary35
Summary
Complex ProjectC p j Design Build Team worked together Team worked together
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Questions3636