Rangedale Relining Success

THE CLIENT: Greater Western Water (GWW)

GWW provides drinking water, sewage, trade waste and recycled water services throughout Inner and Western Melbourne. GWW owns extensive infrastructure requiring ongoing maintenance. Programmed Facility Management (PFM) is GWW’s Principal Operations and Maintenance Contractor. Rangedale Group has been a PFM contractor for over 10 years and were entrusted to deliver this complex and critical project.

THE CHALLENGE:

Rangedale Rehabilitation and Renewals was contracted to reline 14 Sewer maintenance holes, each with highly variable maintenance conditions hindering access in areas where GWW’s key customers discharge industrial waste (trade waste) into the sewer system.

To rehabilitate these maintenance holes, we faced three major challenges:

1) The project area was a designated No-Go Zone. Working downstream of the industrial waste discharge points, the team faced high flows of hazardous effluent that required a diversion of sewer inflow and thorough risk management.

2) Each maintenance hole was heavily degraded. Decades of highly corrosive effluent passing through the system corroded the concrete causing significant damage.

3) The high-risk profile of the project meant GWW needed a contractor who could minimise entry.

Rangedale was tasked with delivering a low-risk design and to construct maintenance holes rehabilitation solution.

THE RANGEDALE SOLUTION:

Traditionally in Australia, such maintenance hole rehabilitation solutions rely on the integrity of the existing entry, such as Protective Coatings, to bond to the maintenance holes lining. Other systems require extensive manned- entry to install liners, or expensive preliminary maintenance hole modification works before a liner can be slipped down an existing maintenance hole.

Rangedale offered a structural lining system that did not rely on the integrity of the maintenance hole. Rangedale’s Vertliner is a UV Cured in Place Pipe (CIPP) liner, manufactured to the exact size of each maintenance hole. The liner was installed from surface level without entering the maintenance hole, then inflated with air pressure and rapidly cured using a Ultra Violet (UV) light train mounted inside the inflated liner.

The end product was a structural Glass Reinforced Plastic (GRP) pipe liner, installed and bonded to the original maintenance wall.

THE OUTCOME:

Using our unique UV CIPP technology, backed by the best-in-class Vertliner, Rangedale installed 14 maintenance hole liners with no manned entry. We then completed reinstatement works, installing new ladders and droppers.

This state-of-the art technology is new to the Australian rehabilitation and renewals sector and represents industry leading best practice.

Learn more about our relining services

Watch a video on our UV Light Train Relining System

 Date: February 2022

North East Link Early Works

THE CLIENT: GHD

As part of the North East Link early works Rangedale Drainage Services were engaged by GHD to provide a Quality Level A Survey of all underground utilities conflicting with the proposed alignment though the Greensborough area.

THE CHALLENGE:

Rangedale, in consultation with the client compiled a project specific methodology and intense program taking in to account the site complexities and constraints of high-volume traffic, limited working areas and hours, residents, business holders the environment and the like.

The project was undertaken with a high focus on minimising the impact on all stakeholders, the environment and surrounding community. After months of pre-planning site works kicked off in early November 2018. With multiple work fronts and tasks being undertaken simultaneously such electronic service location, ground penetrating radar, asphalt and road cutting, hydro excavation (non–destructive digging), survey, back fill, and hot mix asphalt road reinstatement both day and night.

THE RANGEDALE SOLUTION:

Rangedale Drainage Services provided this project with professional inhouse turnkey solutions to deliver a Quality Level A Survey. This project, in partnership with the client, was successfully completed with a combined effort of the integrated project team. All works were completed under major traffic management providing safety to all project personnel whist maintaining suitable traffic conditions for commuters, both motorists and pedestrians.

With an ongoing focus to minimise impact on the community and environment, whist protecting both asset and personnel with a high-capacity safety focus delivering a zero-harm outcome in a timely manner to meet the project mandate of late December.

THE OUTCOME:

Overall, the data obtained in these pre-works (early works) will ensure future project contractors can rely on accurate quality data to delivery.

Date: December 2019

Westgate Tunnel Viaduct Cleaning

THE CLIENT:

As part of the West Gate Tunnel Project, our client needed to conduct an internal structural investigation of the Footscray Road on and off ramp viaduct structure. 

THE CHALLENGE: 

Early investigations found evidence of a biological hazard which was due to a build-up of pigeon excrement from infiltration over many years. A focus on planning was imperative in order to control the high level of risk involved in performing the cleaning task at hand.

THE RANGEDALE SOLUTION:

In consultation with the client, a collaborated methodology was implemented to manage the risks and hazards of the biological matter, restricted working space, access and egress challenges resulting in the viaduct being classified as a confined space. Prior to work starting, specialised PPE was procured, and rescue plans were rehearsed multiple times, ensuring all personnel were equipped to perform an emergency rescue if required. Once all parties were comfortable with the controls in place to manage all hazards and risk, cleaning commenced.

The cleaning process involved major mobilisation and set up involving a highly trained 6-person crew, industrial combination high velocity vacuum unit, up to 300m of vacuum hose inside the viaduct, specialised confined space entry equipment, standby breathing apparatus and rescue equipment, radio communication, and a task specific permit system.

THE OUTCOME:

During these specialised works, Rangedale had the foresight to record all atmospheric data through our CSE permit system to provide evidence to our client and the asset owner for classification in the case of future works in this space whilst installing preventative netting to reduce future infiltration. In collaboration with both parties’ safety teams, experienced supervisors, and management, knowledge, and experience were shared to execute the task safely, efficiently whilst capturing data to provide project learnings for better future outcomes with zero harm to people, assets and the environment. Overall, a great outcome.

Learn more about our industrial vacuum loading combination units.

Date: April 2019

Rangedale Drainage Winning at Flemington

THE CLIENT: Victoria Racing Club

The Victorian Racing Club engaged Rangedale Drainage division by Mr. Gooding the manager of Australia’s most famous Flemington racecourse.

THE CHALLENGE:

Mr. Gooding’s racecourse maintenance team noticed some ground subsidence in different locations throughout the racecourse training areas and racing tracks. This was of enormous concern, as the Melbourne Cup race carnival was fast approaching with preparation at the racecourse already underway.

An urgent call from Mr. Gooding to Rangedale Drainage agreed that an urgent pipeline CCTV inspection of all the pipelines which run throughout and underneath the racecourse was needed to evaluate if the subsidence was being caused by defective pipelines.

THE RANGEDALE SOLUTION:

Once the CCTV inspection was completed, it was identified that numerous pipeline sections with rubber ring jointed pipelines had severe infiltration. This infiltration was caused by the ground conditions present at the Flemington racecourse. Excavation to repair the pipelines was not possible due to the enormous cost involved and the potential for disruptions during the race carnival period.

It was discussed and decided that Rangedale Drainage would install numerous Smart Lock pipe repairs to the identified defective sections of pipelines. Rangedale swung into action and installed Smart Lock repairs to pipelines from DN300 to DN525.

The manager at Rangedale noted, “It was a huge challenge, but the Smart Lock repair system was the only system which could have started and completed the whole project within the time frame required to cause no disruption to the racing carnival period. Some of the defective joints had severe infiltration, which was no problem for the Smart Lock to seal and more importantly repair.”

THE OUTCOME:

As well as the high infiltration, Rangedale’s installation crews had to deal with severe weather during the installation periods, the weather was not easy for the crews but the Smart Lock could still be installed due to the large diameter by-pass Smart Lock packers as well as the materials and resins which are used as part of the Smart Lock system.

Mr. Gooding, Manager of Flemington Racecourse, said, “I could not be more pleased with the results, after the first day of installing the Smart Lock, all of the concerns were eased and that we had made the right decision to install the Smart Lock repair system. It was amazing to see how the system worked to seal and repair the defects, it is even more pleasing knowing that they were supporting an Australian designed and made product.”

Learn more about Smart Lock

Date: August 2019