Shortlisted for Digital Construction Awards 2018
Project: HS2 3B Utility Design Package
Our Client: Costain Skanska – JV Enabling Works Contractor
High Speed 2 (HS2) is a planned high-speed railway in the United Kingdom, directly linking London, Birmingham, the East Midlands, Leeds and Manchester.
Our utility design project is geographically in the highest profile area – Euston. Our contract is within the overall enabling works package. It is the design of all of the utility diversions in the Euston area and is crucial to the success of the project.
Our design package is divided into 6 lots. The scale is huge with over 5000m of gas, water and electrical diversions and 20000m of communication infrastructure to be diverted in some of London’s most congested streets.
The tender package came out as individual utilities and as 2D deliverable. We worked collaboratively with our client CSJV through the tender period and provided an alternative offer that illustrated the benefits of a BIM enabled Multi- Utility approach on the scheme.
We believed passionately that in congested city streets the only way to design and deliver this project was through the use of 3D modelling of the existing and proposed utility infrastructure and we knew from experience that the investment in the technology at design stage would deliver demonstrable benefits in the construction phase, reducing clashes and saving programme delays on site.
The specific technologies we adopted are related to the provision of 3D modelling, predominantly the tool we used to deliver the design was Microstation 3D not only for the design modelling but also for the inclusion of the clients Undertakings and Assurances requirements which we included as a separate layer within the model.
The use of 3D modelling is relatively new within the utility environment and we have developed a variety of styles that have been adopted by software companies.
We supplemented our Digital Approach with a suite of plans such as BEP (BIM Execution Plan) and a BIM Assurance Plan.
At peak our design team has numbered 30 staff on the scheme with a mixture of design management, designers, technical leads, CAD staff and document controllers working hard to deliver the designs for this most complicated of schemes.
The viability of the approach we suggested has been proven to us as Design and Build contractors time and again, we knew that the additional time invested in constructing the model at design stage would reduce wastage and programme delay within the construction phase.
This saving is 15-20% in relation to material wastage and a construction programme saving of 20%.
This approach produced a better design, more implementable with a minimum of on-site rework, Working with our design subcontract partners we upskilled not only our own staff but those within our design supply chain.
The use of a modelled solution is congested areas produces a design solution that cannot be achieved in 2D and allows the client, utility stakeholders and construction partners to see and understand the constraints and design choices that are made to ensure that spatially the design works.
We have worked hard to professionally develop our team, internally sponsoring staff including a MSc in BIM and upskilling technicians to deliver BIM designs.
The solution we derived demonstrated what a BIM solution to utility design in the right environment can offer.