Melbourne Metro Tunnel
Temporary Works Engineering Packages
EPES were engaged by CYP to undertake various design packages related to temporary works during construction, including:
1. Concept design and planning assistance for pressurised services (dewatering, compressed air, recycled water and potable water) used in excavation works at the CBD North and South zones (covering 8 shafts and interconnecting tunnels)
2. Engineering design for adit and cavern hooks, cross over supports and shaft brackets, and verification of shaft service ladders and top shaft brackets
Generally, design packages incorporated engineering analysis, reviews for constructability, safety in design and coordination with construction teams to ensure that design was in alignment with site expectations.
Project Information
Location: Melbourne, Victoria, Australia
Client: Cross Yarra Partnership (CYP)
Engagement: Engineering Consultant
Sectors: Industrial, Rail 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. Identifying the correct design loadings, as well as risks associated with operation in a live construction environment were considered in the engineering analysis. Relative conservatism is this type of design package is pragmatic, whilst understanding the temporary nature of the works.
Analysis and Implementation
EPES performed analysis is accordance with the mandated standards and codes such as AS1170 for loading, AS4041 for pressure piping and AS4100 for steel structures. Close consultation with site construction enabled coordination with actual installation constraints as well as a means of clarifying design cases, limitations and risks.
Outcome
The outcome was a comprehensive design package with appropriate levels of buy in from temporary works managers, site teams and procurement. Design documents were prepared well ahead of the being required for site works which enabled proper planning to be undertaken and communication to respective site personnel.
Well organised and planned design work dramatically reduces both technical, safety and commercial risks for all stakeholders on a project.
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