WestConnex - M4-M5 Link
Pressurised Services and Dewatering Concept Strategy
The M4-M5 link is part of the WestConnex project in Sydney and involves the construction of twin 7.5km tunnels to link the new M4 at Haberfield and the new M5 at St Peters. EPES were engaged by LSBJV to perform conceptual design methodology for installation of pressurised temporary services for use during construction.
1. Dewatering systems
2. Compressed air
3. Industrial water
The works include the determination of installation, testing, inspection and maintenance requirements for the pressurised services systems, as well as nominating pumps, piping and valving requirements.
Project Information
Location: Sydney, New South Wales, Australia
Client: Lend Lease, Samsung, Bouygues Joint Venture (LSBJV)
Engagement: Temporary Works Design Engineer
Sectors: Industrial, Road Infrastructure (Tunnels)
Services: Construction and Design Consulting, Independent Reviews and Audits, Infrastructure Engineering, Piping Engineering, Specialist Analysis, Water and Waste Water
Year: 2019
The Problem
Pressurised services are complex on large construction projects and can be high risk in the event of a failure. They can also be highly problematic for construction works if they do not perform as required by the demands of the construction process.
Recognising the size and complexity of this project, as well as a need to ensure consistency across the various construction fronts, the objective of this design was to collate and coordinate all of the variable pieces of information and perspectives and achieve a common approach to pressurised services installation.
Analysis and Implementation
Several meetings with stakeholders in design, project management, construction and procurement were undertaken to collate the different ideas and information associated with the works. Design documents were developed, along with robust and practical engineering design to ensure consistency, standardisation and a clear path toward compliance with standards.
Outcome
Through this process significant commercial advantages were achieved through standardisation and sharing of plant and equipment, enabling early ordering of piping and valves and exploiting the opportunities of economies of scale.
Undertaking early planning and design concept development, as well as opening communication with various stakeholders early in the project life cycle there are significant commercial benefits as well as reduced level of risk.
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