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Picote Flexi-Sliplining System

The Picote Flexi-Sliplining System is an economical and fast method for the relining of DN100 to DN300 gravity sewers at 8 metres per minute, through existing manholes and without the need of a lead-in trench. The pipe is a self-supporting, three layer polyethylene pipe that is winched into the pipes via existing…

Quinns Main Sewer Project: Challenges and Lessons Learned

The Quinns Main Sewer (QMS) project consists of constructing approximately 1,900m of 1800mm internal diameter main sewer from Neerabup to Clarkson in Perth, Western Australia, including associated access chambers. The alignment starts in the Neerabup National Park, crosses the Mitchell Freeway and Transperth railway,…

Reducing Scope 3 Carbon = Reduced Costs an Urban Utilities Case Study

The Water North Zone Program has delivered 60+ Water Main Renewals since commencement of the Program Management Approach framework. The actual cost commercial model of the framework enabled collation of large amounts of cost and construction data. Diona’s self-performance delivery model, the open book and data driven…

Rockpecker Spiral Stabilizers' Triumph in Irish Water Project and Environmental Impact

This white paper showcases the remarkable performance of Rockpecker's Spiral Stabilizers in the triumph of the Lower Harbour Main Drainage Project in Cork, Ireland. Leveraging the metaphor of the Rockpecker bird's soaring height determined by the depth it drills, this paper illustrates how Rockpecker's 12" and 22"…

Soil Loads for Liner Design

The design of liners for the rehabilitation of fully deteriorated host pipes for non-pressure pipelines requires the designer to assess all external loads including soil and live loads and external groundwater pressure. The treatment of soil loads in particular is often the subject of debate and various existing…

Testing and Evaluation of a Polymeric Spray Applied Pipe Lining for Pressure Pipes Renewal

Issues related to buried and underground piping are very important. There are significant differences between buried and non-buried piping. Buried piping has unique degradation mechanisms, degrading from both the interior and exterior. Since the systems and equipment involved are ‘out of sight’, the normal…

The Role of Green HDD for Pipeline and Power Grid Construction

The development of sufficient pipeline capacity, a sustainable power grid and the protection of the networks against the increasing threat from environmental factors are the major challenges for future energy supply. Due to the public environmental awareness, smart trenchless installation methods are required for fast…

The Science of Pipe Cleaning

This presentation examines wastewater main cleaning procedures and new methods for optimal cleaning results. Participants will learn about the relationship between flow and pressure as well as nozzle design and how that impacts the performance of the equipment. The causes and remedies of “blown toilets” will also be…

Thinking Outside the Box (Culvert): the Innovative Repair of a Culvert at Penrith Wrp

The Penrith Water Recycling Plant treats 24 million litres of wastewater each day. Culvert 1, which transfers treated wastewater from clarifiers to nearby filter pumps and evaporation ponds, was showing signs of ageing and surcharging when pressurised. The surcharges and condition of the culvert presented a risk to…

To Dig, or Not to Dig: That Is the Question. Improving Environmental, Cultural and Archaeological Outcomes Through Using Trenchless Construction Solutions Over Traditional Open-Cut Methods

The Lockerbie Main Sewer Project is a 9 km sewer on Wurundjeri Woi-wurrung Country that was installed through a combination of construction methods. This paper explores the true tangible and intangible costs and program implications of large-scale construction in areas of environmental or cultural significance. It…

Tunnels, Microtunnels, HDD and Direct Pipe Technologies Make the Trans Mountain Expansion Project Possible

Ultra Low Carbon Jacking Pipes

As part of a design and build contract, BESSAC built a 1600 mm ID micro-tunnel using Ultra Low Carbon jacking pipes: This is a world first ! This project is part of the upgrading works of the Bonneuil-en-France (France) wastewater treatment plant, which aims to increase its treatment capacity in the context of a…

Under Pressure – Successful Rehabilitation of Potable Water Pipes in São Paulo, Brazil, with Saertex-Liner H O

Aging potable water pipe infrastructure is a constant maintenance challenge for water authorities worldwide. Access to drinking water from a tap is taken for granted in developed countries despite supply being a tough and sensitive task. Supply became an issue in the city centre of São Paulo, Brazil during the global…

Unitywater’s Liveable Communities Narangba Sewer Transport System – Balancing the needs of the community through Trenchless Technology

The Narangba Sewage Transport System (NSTS) project addresses the sewer trunk infrastructure challenges posed by the Moreton Bay Region Liveable Communities. It involves the construction of over 11km of sewer gravity mains, sewer rising mains, and new sewage pumping stations. The NSTS project's trenchless construction…

Urban Utilities Breakfast Creek Trunk Sewer Augmentation Project

The Breakfast Creek Trunk Sewer Augmentation project will provide increased capacity in the sewer network to cater for growth in key areas of the city and minimise risk of environmental impacts. The work will also address a damaged section of existing trunk sewer that is limiting flows. The new trunk sewer is being…

Advancements in structural cured in place pipe (CIPP) materials, liner design and manufacture

In the past, structural CIPP solutions have been reliant on traditional methods and materials, such as felt liners and polyester resins requiring a significant time and resource investment. As new and more demanding standards are introduced – such as the 2019 American Water Works Association (AWWA) “Structural…

Advances in Array GPR Solutions for 3D Underground Utility Mapping

Advancement in the development of GPR systems now allows for rapid full 3D capture of underground assets using arrays of multi-frequency, multi-polarised GPR antenna which are either hand pushed or towed by vehicles. This rapid capture capability now allows for hundreds of thousands of square metres of georeferenced…

Artificial Intelligence defect detection and condition assessment

VAPAR has recently completed defect detection and condition assessment projects with Australian, UK and NZ water utilities on both sewer and stormwater pipe inspection footage. The collection of data from these projects yielded an assessment of the types and frequencies of defects present in pipes of different…

ASTT 2022 Governance Document

ASTT Constitution V2

Better utility data – important, but not a cure-all

Improvements in underground asset locating technology, data storage and GIS have led to higher expectations and reliance on these tools to safely manage excavations. While the advantages of these advances are not disputed, it is vital that locators and their clients understand their limitations, particularly for high…

Calculating and mitigating coating damage mechanisms from HDD installation

This paper will focus on the many components involved in HDD installations which have the potential to negatively impact the condition of the anti-corrosion coatings of the pipe. Considerations which include details such as soil conditions, entry/exit angle, pipe size, length of the pull, and others will be explained…

City Rail Link – Mt Eden Major Wastewater Diversion

The Auckland City Rail Link Project is New Zealand’s largest civil infrastructure project to date. Design and construction of this project is being carried out by the Link Alliance. The project will provide two new underground rail stations in Auckland’s central business district, and a major expansion of the existing…

Classification of Concrete Wastewater Infrastructure Corrosivity

This research paper proposes the quantitative corrosion classification of the internal environments of sewer network. The classification was undertaken from field investigation of the corrosion effects of sewer environments on concrete materials in sewer assets across Australia. The concrete materials examined…