Pipe Inspection and Trenchless Rehabilitation WIOG May 2017 Mark Hughes and Dave Neru

Coming Up… Company Overview Pipe Rehabilitation Clean and Survey

Company Overview New Zealand Owned Group of Companies Operating for over 20 years Over 200 staff Technology specialists in: Pipe line condition assessment and rehabilitation SW and WW Networks operations, maintenance and management Branches in Whangarei, Auckland, Hamilton, Blenheim and Christchurch

Pipe Rehabilitation

Trenchless Methods Fold and Form Spiral Plastic Cured In Place (CIPP) UV CIPP Pipe Bursting Directional Drilling Micro Tunnelling Pipe Jacking Grouting There are a number of rehabilitation methods used in New Zealand. The common civil trenchless construction methods are pipe bursting, pipe jacking and directional drilling. The common trenchless lining products are Fold and form, Spiral plastic and CIPP. Lining has been used in New Zealand for over 30 years and has recently come to the forefront in recent times as the rehabilitation method of choice after the Christchurch earthquakes. – an estimated 300 kilometers of network in Christchurch has been rehabbed with lining products. It should be noted that Christchurch lining design criteria of having a fully deteriorated host pipe, in fluid soils in flood conditions, was never heard of in the world of lining up this event.

Limited only by Pipe Material Renewal Comparison Methods Method Diameter Impacts Application Pipe Material Gravity Pressure Open Cut I, S  Limited only by Pipe Material PVC, PE, MSCL, DICL, GRP, Composites Pipe Bursting Up to PN25 PE, Restrained Joint PVC Slip Lining L PE, PVC Relining (CIPP, Fold & Form, Spiral Wound) M CIPP up to PN12 PVC, Proprietary Reinforced Soft Liner & Resin Combinations Close Fitting PE (Compact Pipe, Swage, Sub-line, etc) Up to PN12.5 PE Legend: I = Increased, S = Size for Size, L = Larger Reduction, M = Minimal Reduction With everything there are limits to methodologies. Basically ling is no good where you want to increase capacity of a service. Structural properties will vary between products with fold and form and spiral plastic being constrained to manufactory process, whereas CIPP can be made to design.

Pre treatment required Identify Suitable Lining Methods LINING Suitability FOLD & FORM CIPP CLOSE FIT SPIRAL WOUND Reticulation sewer (150-300mm dia) Yes Branch sewer (>300mm dia.) No Maximum Installation length on 150mm diameter 135mtrs 250mtrs 100mtrs Maximum Installation length on 225mm diameter 120mtrs 300mtrs Maximum Installation length on 300mm diameter 110mtrs 500mtrs Maximum Installation length on 375mm diameter NA Maximum Installation length on 450mm diameter 400mtrs Suitable to line Bends up to 90 degrees Suitable to line sewers with multiple drop joints Suitable to line sewers with multiple grade variations Suitable to line sewers with running infiltration Pre treatment required Pre liner advisable Reticulation sewer Bypass required Branch sewer Bypass required High flows only Liner water wall Thickness 4 to 7mm 4 to 27mm 1 to 3mm - Each lining product has limits that will be based on installation certainty. - The more ridged the product the more installation barriers it will face. - All products face issues with running water and all have methods to over come this issue such as pre liners, pre patching etc

Fold and Form PVC  structural lining system to ASTM1504  service life in excess of 50 years  uniform wall PVC pipe construction  no joints  installed in intimate contact to the pipe  no annular spaces behind the lining   - Today we are going to discuss PVC fold and form and a installation project in Cashmere Christchurch.

Fold and Form PVC – Cashmere Project 3 Line 150mm Lines In the bush Step gradient Limited access Behind Properties   Equipment Access Manholes US DS - 3 x 150mm lines spanning around 160 meters, down a step gully behind flash houses Access was down a narrow drive way some 300 meters long The plant and equipment used for PVC fold and form is a large steam generator (1x 6 wheeler truck) 1x hydraulic winch and associated generator, power pack etc ( 2nd 6 wheeler truck) and a platform carousel (1x ute and trailer) Additional a robotic cutter unit is also required

Fold and Form PVC – Cashmere Project Special Trolley System Adjustment of crane system   - A special trolley was design and build to get the carousel down the bank and a crane truck modified. We wanted to remove as many person from the moving and placing the product on site With all lining it’s the access and placing of plant and equipment the provide the challenge. The process and procedure of lining is not complicated and is very repetitive.

Fold and Form PVC – Cashmere Project Hangi on! Steam use to heat coil   - We eased the carousel down with the crane truck and only had to shimmy the carousel a little to get in-between the flowers.

Fold and Form PVC – Cashmere Project Feeding Time   - It takes about 30-40 minutes to heat the PVC coil to a malleable state to feed into the host pipe. - Once this is achieved the product is able to move through bends and manhole channels

Fold and Form PVC – Cashmere Project Feeding Time   Once through to the other side, expansion plugs are inserted into both ends ready for expansion The product cools slightly when feed into the host pipe, so some time is taken to heat the product to a malleable state again

Fold and Form PVC – Cashmere Project After a feed its time to expand!   Note slight over expansion of the Fold and Form EX pipe which confirms complete expansion & also mechanically ‘locks’ lining into place. Once the product has reached a malleable state and the outside of the product has reached the desirable temperature the DS value is closed off and the expansion process begins The steam raises the temperature insider the EX creating pressure which expand the pipe It is held and certain increments to ensure full expansion along the entire length of pipe Once full expansion is achieved air rapidly replaces the steam and the cool down period begins

Fold and Form PVC – Cashmere Project All done – satisfied!   - Once cool down has finished 1-1.5 hours then the cutting open of junction and end seals are completed

Fold and Form PVC – Cashmere Project Summary of wins Health and Safety issues minimised Pull throughs - reduce set ups (movement of equipment) Less disruption to home owners Environmental friendly Only reinstatement in manholes (end seals)   Cashmere Team won SICRT Environmental, Health and Safety and Quality Award

Pipe Inspection

Pipe Cleaning & Inspection Walkthrough and CCTV Asset Condition Assessment History Of CCTV Technology advancement Personal profile Asset condition assessment  

Pipe Cleaning Why we clean Methods Equipment  

Pipe Cleaning Root cutting Hydro excavation  

Pipe Cleaning Recycling technology  

Pipe Inspection Technology and Equipment Pipe inspection equipment Laser Profiling Gas attack  

3 hours continuous recording Over 2,000m line length 2x digital zoom High Resolution 3 hours continuous recording Over 2,000m line length Only limited by tether (rope) availability

Pipe Inspection Walkthrough Why H&S Waimakariri tunnel  

Pipe Inspection Traditional CCTV equipment Summary  

Questions?