Spencer Street Sewer Update: Hobas Manhole Installation

Photo Location: Flinders Lane and Spencer Street, Melbourne CBD.

The Spencer Street project is well underway and this week the first of three HOBAS CC-GRP Manholes were successfully installed at 6m depth.

Head Contractor: Quinn Civil
Asset Owner: City West Water

MDS 03 – OD2555 HOBAS Pre-Fabricated Shaft, SN10,000, 6m depths (Installed).
MDS 04 – OD2160 HOBAS Pre-Fabricated Shaft, SN10,000, 10m depths.
MDS 05 – OD2555 HOBAS Pre-Fabricated Shaft, SN10,000, 11m depths.

HOBAS CC-GRP products will be used throughout this project creating a complete, uncompromising system of the highest quality. HOBAS CC-GRP Manholes coupled with HOBAS Jacking Pipe ensures consistent quality for critical infrastructure projects with difficult access like Spencer Street in Melbourne’s CBD. The lightweight manholes were delivered as complete components to the Spencer Street site completely assembled. This reduces the need for additional construction in-situ, which could compromise the quality of each unit. No protective coatings or sealing work is required so installation is rapid.

ARPOL Mechanical Couplings:
DN1500 ARPOL INSTALL Series ICZ Quality W5 Mechanical Couplings were used to make the connection between the OD1499 HOBAS CC-GRP Jacking Pipe for the Sewer Pipeline and the HOBAS Pre-fabricated Manholes. Global Pipe specifies and supplies Arpol Couplings for many of their projects. Arpol is a world-renowned manufacturer of hi-tech flexible couplings suitable sealing joints in waste and water applications, oil and gas distribution, mining and civil engineering projects. The couplings are easy to install and are also corrosion resistant. Arpol Couplings manage angular deflections, axial movement, radial deformation and vibration which cuts down on unnecessary stress to pipes in the system.

Project Planning:
Global Pipe worked with Quinn Civil and Wood & Grieve Engineers to assess the project requirements and create a seamless transition from planning and specification, to construction and project delivery. Global Pipe’s expert team studied the feasibility of the project, to determine the use of HOBAS CC-GRP Manhole systems. After reviewing the project’s specifications, Global Pipe found a solution targeted to the project and then detailed the logistical solutions which would ensure the success of the project.

Engineering and Design:
Our highly qualified in-house team of mechanical and civil engineers provided comprehensive technical support, engineering and design services at all stages of the Spencer Street project. Global Pipe is supported by the expansive engineering resources of our international manufacturers HOBAS and Arpol.

Manufacturing and Qualification:
HOBAS Pre-Fabricated Manholes are certified to international standards from ISO, TUV, EN, and ISO9001. To meet these standards, stringent manufacturing inspection and testing is carried out, including raw material qualification, stiffness testing and dimensional verification. Arpol Couplings guarantee long service life and meet industry and international standards ISO9001, ISO 14001.

Supply and Logistics:
Global Pipe provided a complete transport, freight logistics, warehousing and distribution solution to supply the Manholes. The Spencer Street site is located in a compact and busy CBD location in Melbourne – meaning on-site storage of any pipes or manholes was impossible and the timely transport and delivery of pipes and manholes were critical.

Project Management and Supervision:
Global Pipe’s team of engineers provided dedicated technical support throughout the project lifecycle – ensuring engineering challenges were dealt with immediately to minimise risk and maximise peace-of-mind for all project stakeholders.

Training and Support:
Global Pipe provided Quinn Civil with comprehensive product support. We provided product technical training information and manufacturer guidelines to installers and supervisors.