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Construction Tech Review | Monday, February 01, 2021
BIM is a powerful process that enables owners, engineers, and contractors to collaborate more effectively and increase the transparency of information shared among project partners.
FREMONT, CA: BIM software and information management approaches have advanced to the point where owners, consultants, and contractors can completely digitally manage tunneling and underground projects, from design to construction and finally to asset management. Nonetheless, certain roadblocks continue to obstruct BIM's widespread adoption across the industry.
The first and most critical is a lack of familiarity with BIM. To successfully integrate BIM into a project, all stakeholders must rethink their preconceived notions of typical project workflows. For example, 3D design requires significantly more coordination on the front end than 2D design. Conflicts between disciplines are "weeded out" throughout the design process, up to and including construction, in a typical 2D design. In comparison, 3D design necessitates the coordination of all disciplines throughout the design process. Similar to 2D models, 3D models require more setup time. These and other factors contribute to the perception that implementing a BIM platform will incur additional costs. While this is true for the initial setup, successful BIM implementation can reduce overall project costs by eliminating conflicts, improving coordination with project stakeholders, and facilitating more efficient construction planning, particularly when using 4D and 5D design processes.
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Another significant barrier to BIM adoption in tunneling is that existing BIM software is not always tunnel-specific. While existing software can and is successfully used in tunneling projects, not all BIM modeling software can model horizontal structures properly, such as tunnels. Similarly, data exchange between software programs frequently causes complications, as tunneling specific file formats are uncommon.
Fortunately, the industry is addressing both of the issues mentioned above. To address this lack of familiarity with BIM, the tunneling industry is moving toward greater standardization in BIM use across projects.
Another significant shift in the industry is the adoption of BIM for asset management purposes. Owners are increasingly expecting to use BIM models created during design and construction as asset management tools as more projects incorporate BIM and as more "digital assets" are created during design. The current state of software sophistication enables the creation of a "digital twin" of an asset, i.e., a digital representation of an asset that contains all the necessary process information for maintaining and operating the structure.
BIM is a broad topic that encompasses numerous concepts, ideas, and technologies, and what the industry will refer to as BIM in ten or twenty years (if at all) remains to be seen. With the growing trend toward digitization across all industries, BIM concepts are almost certain to become ingrained in many, if not all, tunneling projects sooner rather than later. Simultaneously, as software advances and the tunneling industry gains more BIM knowledge, "what BIM is" and how BIM is viewed will continue to evolve.
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