Specifying Trenchless Sewer Rehabilitation Projects. Presented by: Todd Stelmacher Visu-Sewer, Inc.

Transcription

1 Specifying Trenchless Sewer Rehabilitation Projects Presented by: Todd Stelmacher Visu-Sewer, Inc.

2 Todd Stelmacher Bio Visu-Sewer Sales Engineer MN, ND, SD, WI 30+ years public utilities experience Municipal Engineer Consulting Engineer Contractor

3 Why do we need spec s? Convey the owner s needs to the contractor. Establish a level playing field for bids and quotes.

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5 Typical Phone Calls How much do you charge per foot to camera sewer pipe? How much do you charge per foot to line a pipe?

6 How much pipe do you have to televise or line? What is the pipe size? Where is the pipe located? How much flow is in the pipe? How dirty is the pipe? Should we figure jet/vac or just jetting? Where do we get water? Where do we dispose of material? Traffic? Etc, Etc.

7 What are you looking for? What are you going to do with the CCTV inspection?

8 Sewer Cleaning Jet Cleaning Jet / Vacuum Cleaning Recommend all cleaning work be completed per the NASSCO Jetter Code of Practice

9 Sewer Inspection

10 NASSCO = National Association of Sewer Service Companies PACP = Pipeline Assessment and Certification Program

11 What is PACP? Unified national standard of abbreviations and codes used in Sewer Inspection Standardized data format Certification of software vendors Guidelines for mapping of data results A basic assessment protocol is also included in the PACP program A training and certification program for TV inspection operators. NASSCO was assisted by the Water Research Centre (WRc) of the UK & Europe in deriving the PACP program. website:

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13 Visu-Sewer Clean & Seal, Inc. W230 N4855 Betker Road, Pewaukee, WI Tel.: (262) Fax: (262) Web: CITY OF RACINE CCTV Date 12/9/2003 Pipe Size 8 Pre-Cleaning Jetting Media No. 03 Upstream MH TO191A Job Number 03254W-01 Material Reinforced Concrete Pipe Weather Dry Alt.Media No. Jt. Spacing 0 Surface Asphalt Counter Start 1:24:09 Location (Street) RACINE ST. Shape Circular US MH Depth 10.2 Counter End 1:50:49 Comments SANITARY SEWER Downstream MH TO191 Flow Direction S DS MH Depth 10.5 Surveyor RAUL M. LOPEZ Use of Sewer Sanitary Survey Direction Downstream Pipe Length Certificate No Ftg. Code Description Position Cont. Comment 0.0 AMH Access Point - Manhole MH-TO191A 0.0 DAE Deposits Attached: Encrustation 12 to 12 S TF Tap, Factory Made TF Tap, Factory Made TFC Tap, Factory Made: Capped TF Tap, Factory Made 9 HOLE IN TAP 43.0 TF Tap, Factory Made TF Tap, Factory Made TFC Tap, Factory Made: Capped TFC Tap, Factory Made: Capped TF Tap, Factory Made DAE Deposits Attached: Encrustation 7 to TF Tap, Factory Made TF Tap, Factory Made TFC Tap, Factory Made: Capped TFC Tap, Factory Made: Capped TFC Tap, Factory Made: Capped TFC Tap, Factory Made: Capped TFC Tap, Factory Made: Capped TF Tap, Factory Made TFC Tap, Factory Made: Capped TFC Tap, Factory Made: Capped TF Tap, Factory Made 3 DAE IN TAP DAE Deposits Attached: Encrustation 12 to 12 F01 AT JOINTS AMH Access Point - Manhole MH-TO191 Generated on Monday, 2/23/2004 at 11:38 AM by the PipeTech TV inspection system.

14 Manhole Inspections

15 Sewer Rehabilitation Chemical Grouting - Manholes Non Structural Manhole must be in fair/good condition Ideal for precast manholes I & I Control Economical Ground/Void Stabilization Types of Grout Urethane or Acrylic Modifiers to improve quality, maintain shape

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17 Manhole Grouting ASTM F Standard Practice for Sealing Sewer Manholes Using Chemical Grouting Acrylamide Acrylic Hydrophilic Polyurethane Hydrophobic Polyurethane Oil-Free Oakum-Soaked Polyurethane

18 ASTM Standards Written by a committee Manufacturers Consulting Engineers Contractors Municipalities

19 Sewer Rehabilitation Chemical Grouting - Joint Test & Seal Non Structural Permanent Repair I & I Control Cost Effective Restrictions Pipe must be in good structural condition

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21 Pipeline Grouting ASTM F Standard Practice for Rehabilitation of Sewers Using Chemical Grouting Scope Summary of Practice Contract Responsibilities Grout Materials & Additives Sewer Preparation for Grouting Joint Sealing

22 Sewer Rehabilitation Chemical Grouting Lateral Connections Similar to mainline grouting, special packer positioned at service connection that extends up the lateral 3-10 feet.

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24 Lateral Connection Grouting ASTM F Standard Practice for Sealing Lateral Connections and lines from the mainline Sewer Systems by the Lateral Packer Method, Using Chemical Grouting

25 Lateral Connection Grouting Caution! Cast Iron Pipe Roots Mineral Deposits Need to specify grout distance Residual Grout Will be present

26 Manhole Lining Ideal for brick and block manholes that are missing mortar

27 Sewer Rehabilitation Cementitious Liners - Manholes Structural, monolithic repair from bench to frame Good for I/I Control Corrosion resistant options available Economically priced per vertical foot Apply to damp environments 30-year design life Preparation includes water-blasting, leak grouting, and debris removal Trowel and brush-finished

28 Manhole Lining ASTM F Standard Practice for Installing a Protective Cementitious Liner System in Sanitary Sewer Manholes Scope Materials and Manufacture Surface Preparation, Cleaning, and Repair Mixing, Application, and Curing Material Testing Verification and Testing

29 Manhole Lining Raven Epoxy

30 Manhole Lining Epoxy Liners - Manholes No ASTM. Specify using Manufacturer Info Must be installed over a relatively smooth surface Typical Thickness New Construction: 80 Mils Rehabilitation Work: 125 Mils Typical Cementitious Liner Cure: 24 hrs Typical Epoxy Cure Time: 6 hrs Typical Temp.: Stable temp above 40 F

31 New Construction Manhole Lining Epoxy Liners - Manholes Force Main Discharge Manholes Lift Stations Interceptor sewers Less Expensive Preparation Build thickness (smooth surface allows for same protection with less material)

32 Manhole Lining Polyurethanes and Polyureas Reappearing in Specifications No ASTM. Specify using mfgr info Must be applied to DRY substrate

33 Manhole Lining Cured-in-Place Manhole Lining

34 Manhole Lining Cured-in-Place Lining No ASTM. Specify using Manufacturer Info ASTM standards for materials and testing Thickness Varies with Design/Depth Installation through the existing casting

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36 Pipe Lining What can be lined?

37 Sewer Rehabilitation Cured-In-Place Pipe (CIPP) What can be lined?

38 Sewer Rehabilitation Cured-In-Place Pipe (CIPP) What can be lined?

39 What Pipe Can be Lined?

40 What Pipe Can be Lined?

41 What Pipe Can be Lined?

42 Pipe Lining Fully Structural Permanent Repair Trenchless Installation Quick Installation Cost Effective Adaptable Material Changes Size Changes Alignment

43 Pipe Lining ASTM F Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube

44 Pipe Lining ASTM F Standard Practice for Rehabilitation of Existing Pipelines and Conduits by Pulled-in-Place Installation of Cured-in-Place Thermosetting Resin Pipe (CIPP) Developed to get around the original patent

45 Pipe Lining Provide maps with manhole depths Provide maps including nearby sewers to assist with bypass Indicate tap locations if possible

46 Pipe Lining Sectional Liners Similar to Manhole to Manhole

47 Pipe Lining Sectional Liners ASTM F Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube Applicable Sections of ASTM F1216

48 Pipe Lining Sectional Liners ASTM F Standard Practice for the Sectional Repair of Damaged Pipe by means of an Inverted Cured-In-Place Liner Patented Process Limited to one Manufacturer

49 Design Considerations Host Pipe Condition Partially Deterioriated, Fully Deterioriated Soil Density Groundwater Load Ground Cover Ovality Reduction Factor Live Load (surcharge)

50 Specification Do s Consider specifying a minimum wall thickness 6mm FINISHED thickness Consider specifying hydrostatic (boiler) installation method for depths > 15 feet. Consider specifying hydrophilic seals at manhole connections Consider specifying brushing/buffing service connections after reinstatement Consider specifying material testing of 10% minimum

51 Sliplining Specification Don ts Typically HDPE or fused PVC pulled into a host pipe More applicable to larger (30 +) diameter Completely different process Fold and Formed Pipe No longer common in sanitary applications Lateral Replacement Specify lateral replacement AFTER CIPP lining. Insert-A-Tee

52 Questions?