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An Improved Approach to a Trenchless Latent Condition Claim

This paper describes an alternative approach to the way a latent condition claim was assessed for the trenchless component of a new gravity sewer installation project. The section of the project in question involved the new installation of a 700mm diameter GRP gravity sewer pipe employing the Axis Microtunnelling…

BP Kewdale White Oil Line

The BP Kewdale White Oil Line transports fuel from BP’s Kwinana operations to the Kewdale terminal of Perth Airport using 12-inch (DN300) pipelines. Due to the construction of the Thornlie Cockburn Link railway project, 12.94 kilometres of the fuel line needed to be relocated. Due to the extremely restricted workspace…

Building Resilience in Our Wastewater Networks by Recommissioning Unused Assets

Under the suburb of Marrickville in Sydney’s Inner West runs three sewer rising mains. The Central and Northern mains had been taken offline due to previous failures. The Southern main remained the only operational pipeline and was itself showing signs of deterioration. Sydney Water wanted to bring the decommissioned…

CDE Provide Eviropacific’s SOLVE with a solution for NDD and hydrovac waste

Columbia Sewer Rehabilitation Rehabilitating in Difficult Conditions

The New Westminster Interceptor (NWI) Columbia Section - originally constructed in 1971 - is 1,622 metres long, and is predominately 1,067 to 1,524 millimetre diameter reinforced concrete pipe (RCP) with a significant grade of up to 5.5 percent in sections. Metro Vancouver has been assessing the condition of the NWI…

Control Survey Automation for Complex Microtunnelling

Control Survey Automation for Complex Microtunnelling Microtunnelling projects with complex Design Tunnel Alignment demand a quality Navigation System to ensure the Tunnel Boring Machine may excavate the planned route within tolerance. Industry standard utilises a Gyroscope or Total Station Navigation System. As the…

Design & Stakeholder Considerations for Highly Urbanised Environments to minimise construction delays and impacts to the community

Sharing our experiences with trenchless projects in the Melbourne CBD will enable other projects that are working in highly urbanised environments to plan and minimise delays during the construction phase, where community and stakeholder impacts are much higher than during the planning phase. One of the critical tasks…

Geopolymers Benefit to Trenchless Technologies

In Australia total length of sewer pipe is over 110,000 kms. This does not include storm water assets. Majority of the assets are now ageing and due to corrosion issues these assets are in dire need for replacement. A study conducted in 2001, estimated failure of water/wastewater pipeline alone to be $250 million per…

Guided Auger Boring in All Ground Conditions

Guided Auger Boring is a trenchless method for accurately (+-25 mm) installing pipes in the ground. There are two different categories of guided auger boring: the Pilot Pipe method for displaceable soils and the Front Steer Method for harder ground and rock. These two methods are different solutions for different…

Harnessing Innovation for Safety Excellence

This project involved undertaking a condition assessment of the existing trunk Sewer Rising Main located between Eagle Farm Pump Station and Luggage Point Sewerage Treatment Plant in Brisbane. These inspections using electromagnetic technology have previously been conducted by draining and cleaning the pipe, and using…

How Geotechnical Baseline Reports and Geophysical Methods Resulted in Greater Ground Condition Certainty - a Story of Strong Collaboration Between

In 2019, Yarra Valley Water’s (YVW) Community Sewerage Program began constructing 49kms of sewer pipes across several communities in the Dandenong Ranges including Kallista, The Patch, Sherbrooke and Sassafras. The sewers are being constructed almost entirely by horizontal directional drilling methods and will see…

How Queensland’s Oldest and Largest Sewer Was Upgraded While the City Slept

Deep under Brisbane’s CBD lies Brisbane’s oldest and largest sewer pipeline. Averaging 1.5 meters in diameter, the S1 Main Sewer runs a total of 12km, stretching from Toowong to the Eagle Farm pump station and is buried eight stories beneath the ground. Built back in 1915, the S1 serves over 750,000 people, carrying…

Impact of Ground Movements on Close-Fitting Liners Spanning Across Joints and Ring Fractures

Ground movements caused by seasonal impacts, vehicle loading, or excavations and other construction operations will lead to extension, rotation and shear deformations across joints or ring fractures in the host pipes. This paper summarizes results from analytical and numerical investigations to quantify the stresses…

Improving Trenchless Infrastructure Delivery by Adopting a 'Flower of Service' Approach

Trenchless technology has transformed the infrastructure sector by allowing the installation, replacement, and rehabilitation of underground infrastructure without excavation. However, improving value transfer to stakeholders requires focusing on facilitating and enhancing services, which represent a small proportion…

Innovations in GNSS for Sub Surface Assets

Global Navigation Satellite Systems (GNSS) have witnessed exponential growth in adoption across various industries, transforming the way infrastructure experts operate in the field. Recent advancements have elevated GNSS into a valuable tool for non-survey staff, enabling them to collect vital field data while…

Innovations in sewer lateral and small diameter rehabilitation

Lateral rehabilitation has gained traction in the industry over the last 25 years and is now recognised as a key part of any wastewater network for its role in infiltration and structural integrity. Historically, lateral rehabilitation was undertaken by small contractors using polyester resins and basic felts, either…

Integration of typical locate data towards rapid 3D utility models

The introduction of new technologies has made it possible to improve traditional fieldwork practices with advanced visualization tools, such as Augmented Reality (AR). This study evaluates the impact of such technologies in real-life conditions, using empirical data collected in collaboration with a leading locate…

Its Big, Critical and Has Vacuum Issues, Can It Be Rehabilitated? Seattle DN1200 Sewer Forcemain Rehabilitation Story

This paper explores the unique performance parameters of a pressure sewer rehabilitation that experiences significant vacuum conditions, the current available alternatives, their limitations and what the rehabilitation manufacturers offer versus what the industry has installed. Pipeline rehabilitation is a common…

Managing an HDD Pipeline Within an Active Deep-Seated Landslide

The management of pipelines within active landslides is challenging, particularly when dealing with deep-seated landslides that pose significant risk to pipeline infrastructure. In this paper, the authors present a case-study of a pipeline operator managing a pipeline installed using horizontal directional drilling…

Micro-tunnelling in congested urban areas: A case study of level crossing removal project

This paper presents a case study for a 275m length pipe-jacked concrete sewer line, installed under an existing road using trenchless techniques as part of level crossing removal works in Melbourne, Victoria. Due to high vehicular traffic in the area and to avoid congestion, micro-tunnelling was chosen as a suitable…

Microtunnelling adjacent the southern portal of the North East Link project

Abstracts should be limited to 250 words maximum. As part of the North East Link Project’s Early Works package, relocation of the Yarra East Main Sewer (YEMS) was required. This package of work focused on the Melbourne Water (MW) and Yarra Valley Water (YVW) sewer relocation for the YEMS. The relocation of the main…

Microtunnelling boom gives rise to new high-tech adaptable machines, yet access to support remains key

The next generation of microtunnelling equipment takes advantage of technology advancements in cameras, Wi-Fi, cloud servers, image enhancement and live streaming. These features provide more information about a job in realtime, and allow for adaptations to be made before a job fails. This improves outcomes on cost,…

MTBM VS Sheet pile, battle for the ages

Thornlie - Cockburn Link (TCL) project, consists of new railway line between the Armadale and Mandurah lines via the Thornlie and Cockburn Stations. The track extension from Thornlie to Cockburn is approximately 14.50 km consisting of narrow gauge 1067mm ballasted (at grade) and slab track (in tunnels and dives)…

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 corrugated wall consisting of high-density polyethylene (PE-HD) for…