Contractor and Design Engineer's 3D Collaboration

The Skanska/McCourt/Aetna JV, in conjunction with VHB for design, was the successful proposer for the $625 million I-95 15 project in Providence, Cranston and Warwick, RI. Even though Rhode Island Department of Transportation (RIDOT) required a 2D drawing submission for this job, VHB agreed to work with us collaboratively in a common 3D model to develop the final design for the project. We will show how, beyond the extensive 4D model we created for the proposal, we established a team that performed an in-depth post-award 4D analysis of every part of the job site, in much greater detail than was achievable during the compressed proposal cycle. The deep dive team consisted of all individuals involved in the planning of the work, including construction managers, utility managers, schedulers, and structural/traffic/environmental engineers, etc. We included all the temporary conditions that are typical to a staged construction, such as support of excavation, utilities and equipment access and location. We vetted any possible improvements or potential risk areas on the job and baked the results into our design. With this effort, we not only created a more efficient design and mitigated project risk, we also increased the accuracy of the associated quantities. The resultant high-quality graphics will also serve as the foundation for our safety-related Construction Work Plans and Daily Hazard Analyses, which heretofore have been a text-only document.