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Supporting the Workforce with the Evolution of HDD Technology

Supporting Trenchless Methods with Emerging Technologies

Putting the spotlight on efficient capital works program delivery, this presentation provides a firsthand look at the new referral service and how it streamlines Dial Before You Dig (DBYD) enquiries to drive more efficient — less disruptive — asset maintenance programs. Join DBYD CEO Stuart Burdack and Esri…

Surface Preparation to Promote Adhesion of Protective Cement Mortars on Corroded Sewer Assets

This work evaluated the concrete substrate requirements to promote the adhesion of protective mortars, specifically calcium aluminate cement (CAC) and one-part geopolymer (GP) mortars. Adhesion tests were performed by direct application on corroding OPC sewer assets that have been in service for 18-81 years. Adhesion…

TK050 and TK2050 Deep Sea Tailings Re-Line

During 2019, HDI Lucas commenced a 3 year Project in Papua New Guinea to remove and replace two DN1200 HDPE outfall pipelines, 190m and 236m in length. These HDPE outfall lines were set at 37 and 33 degrees to horizontal respectively. The first (TK050) outfall line had two separate ROV inspections which observed major…

Trenchless Rehabilitation of a DN 900 Trunk Main Using a Multi-Liner Solution

In 2019, Hunter Water detected a leak on a trunk water main that services a large proportion of the Lower Hunter Region in NSW. This water main is required to maintain security of supply to manage the peak demand over summer. The main is located adjacent to sensitive wetland areas and is directly underneath a critical…

Trenchless Renewal of Unitywater’s DN100 Water Main - Narangba

Ageing pressure water main infrastructure represents a significant risk to Water Authorities throughout Australia and New Zealand (A/NZ). Asbestos Cement (AC) pipe makes up around 40,000 to 50,000km of these assets across the A/NZ region. Most of these AC assets are reticulation sizes (DN100/150) and, with an average…

ASTT Social Media Policy

Long Microtunnelling drives

Microtunnelling Design Guidelines for Sewers (MDG-S)

Supply Chain – Keeping up with changing client expectations

Trenchless Rehabilitation of Pressure Pipes using the Primus Line® System

Unpacking the ASTT Microtunnelling Design Guidelines for Sewers

A New Perspective in Hydrofracture Analysis

Most Horizontal Directional Drilling (HDD) projects in North America continuously monitor annular pressure during construction for mitigating risk of inadvertent returns (“frac out”). Downhole tooling automatically records “realtime” pressure data throughout the length of the HDD crossing. This data has been collected…

Adjusting the Donvale Branch Sewer Design to Achieve a Successful 470m Long HDD Bore

Donvale is an established suburb on Melbourne's north-eastern urban fringe and when the area developed in the 1950’s, the undulating topography and high cost to construct sewers meant that 1,200 properties were not sewered. By late 2017, Yarra Valley Water were two years into the project to construct the 4km long…

Advantages of Engaging a Trenchless Specialist as Principal Contractor for a Significant Sewerage Project

Unitywater used a non-traditional procurement approach when contracting two major sewerage upgrades in growth hotspots on the Sunshine Coast. Community and environmental concerns were forefront in the planning process, and river and major road crossings meant some trenchless construction would always be necessary.…

Application of CIPP Liner in Water Mains in Australia - Project Case Studies

Infrastructure Australia has reported we lose approximately 80 litres per connection per day from our drinking water reticulation systems in Australia. At the same time many water authorities are struggling to fund adequate pipeline renewal programs. Other countries have provided evidence of the long term benefits of…

Bricks, Bends and Bypass – Design and Execution Challenges for the North Yarra Deviation Sewer Rehabilitation Project

Melbourne Water’s North Yarra Deviation (NYD) sewer is a 90 year-old 2.6m diameter triple-brick lined sewer located under the Stony Creek backwash. The asset has been identified for upgrade for a number of years with recognition to the challenging environment to design and deliver the works. The design criteria…

Case Study - Warragul to Moe Water Supply Interconnect - Gippsland Water

At a total project cost of $15M the Warragul to Moe water supply interconnect addresses the shortfall in the Tarago (Warragul) system. The project provides operational security and flexibility to transfer water in both directions up to 8ML per day between the Moe and Tarago systems in the event of supply shortfall and…

Challenging Rehabilitation at a Prominent Tourist Destination

CROSSING THE BROADWATER Innovation, Risk and Partnering

John Holland (JH) is currently delivering Stage 1 of the Long Term Recycled Water Release Plan for the City of Gold Coast (CoGC). This project includes the installation of a 1,800mm diameter pressure pipe over a distance of 1,400m beneath the pristine and well-travelled waters of the Broadwater, between the northern…

Curved Microtunnelling on the Ship Canal Water Quality Project

This paper presents the design of a curved microtunnel for the Ship Canal Water Quality Project, including challenges encountered during design. This is a joint project being constructed by Seattle Public Utilities and the King County Department of Natural Resources Wastewater Treatment Division to meet federal…

Design, planning and execution of trenchless pressure pipe rehabilitation projects with the Primus Line system

The paper focuses on the collaboration between Sydney Water and the German producer of the Kevlar® reinforced composite lining system Primus Line for the rehabilitation of pressurised drinking water mains. It describes the cooperation in planning and executing trenchless rehabilitation projects together and shows, how…

Donnybrook Road East Branch Sewer Project

The Donnybrook Road East Branch Sewer project (DREBS) is an integral piece of Yarra Valley Water’s infrastructure required to service the Northern Growth Corridor which include some of the fastest growing suburbs in Australia. The works comprise approximately 3.6km of pipework between 600mm and 750mm diameter at…

Engineering Ensembles: Addressing Technology Challenges Through Research Collaborations

Many trenchless construction procedures have been developed over the past few decades that offer new approaches to pipe installation, pipe assessment and pipe rehabilitation. However, adoption of an innovative product or process can be hindered when there is a limited track record for the new technique, there may be…