Trenchless rehabilitation of 96” combined sewer Annual...Mott MacDonald | Presentation 17 08 March...

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Trenchless rehabilitation of 96” combined sewer

Brian Shiels, PE

Project Manager

Iselin, NJ

Jersey City Municipal Utilities Authority Phase 3-4 Sewer Rehabilitation

Introduction The ProjectConsider design alternatives

Summary

Presentation overview

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• Serves 250,000 residents

• 230 miles of sewers

The client

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Jersey City Municipal Utilities Authority

• 5,000+ Catch Basins

• Under an Administrative Consent Decree

The Project

Approximately

12,000 linear feet of open cut replacement

30,000 linear feet of cleaning and CIPP Lining

All around Jersey City

Port Authority Jurisdiction (Holland Tunnel)

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JCMUA Phase 3-4 Sewer Rehabilitation

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Interested Parties

Contractor & Subcontractor

JCMUA

JC police

City of Jersey City

NJDOT

NJ Turnpike Authority

PANYNJ

NJ I-Bank

Residents

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The Holland Tunnel approach

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Preliminary investigations

Cleaning and assessment

Consider design alternatives

Rehabilitate 96” steel pipe

Project stepsAccess Agreement and approvals from the various Authorities

Preliminary Investigations

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The 96-inch pipe

Cleaning and Assessment

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CleaningNJDOT Utility Opening Permit

Access Pit Under Rt 139

The 72” access pit

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Safety

Consider Design Alternatives

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Rehabilitation design challenges

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Corrosion Corrosion

Obstructions / Corrosion

Steel Pipe Corrosion / Pitting

Traffic

Pipe Material

Pipe condition

Time Restrictions

Sags

Design alternativesRehabilitation of 2,400 LF of 96-inch riveted steel combined sewer pipe

1Guniting (original design)

2Geopolymer(spincastapplication)

3CIPP lining (field wet-out)

4Slip lining

5Open cut installation

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Styrene Free

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Gunite vs. Geopolymer

Sample photo from Milliken Infrastructure

Guniting

Unit Cost = $ 1,250 per LF

2,400 LF => $ 3,000,000

Coating Removal ~ $600,000

Total = $ 3,600,000

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Cost Comparison of Two alternatives

CIPP Lining

Unit Cost = $ 1575.00 per LF

2,400 LF => $ 3,780,000

Traffic Control $ 180,000

Inversion Access Area Rehab $ 52,000

Total = $ 4,012,000

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Rehabilitate 96-inch Steel Pipe

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Cutting access for liner

Prepping the CIPP liner

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More prep photos

Creating a vacuum

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Opening Pores / Beat the liner

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Improve resin circulation

Resin

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Resin and catalyst

Verify mixture & dye

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Elevating the liner

Water

Wet-out/Inversion ~ 240,000 gallons

(3 days continuous)

Tail End Phase ~ 240,000

(8-10 hours)

Cool Down Phase ~ 240,000

(10-12 hours)

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Tent cover

CIPP lining (pre-liner)40-52.9 mm (1.57-2.08 in)

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Backstop

Prevent end of liner from over stretching or opening

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Finished Product

Value for client

Design Life

Cost

Minimize motorist interruption

Thank you

Brian Shiels, PE

(brian.shiels@mottmac.com)