01Aug 18

BIM CONFERENCE – BIM FOR MARITIME WORKS

BIM multidisciplinary design for Marina di Gaeta

With the third edition of the One Team BIM Conference at the “Roma Tre” University of Rome, the debate on the centrality of Building Information Modeling continues, as an instrument of progress and innovation for contemporary construction. In a general context of profound changes, linked to the theme of digitization, the event aims to provide an overview of the state of the art of BIM methodology in Italy, focusing on regulatory aspects, national surveys and practical application cases.
React was invited to attend the conference and offered its contribution by introducing the theme of BIM for maritime works. The intervention allowed the Technical Director, Eng. Mariella Cosimi and the co-founder BIM Manager, Arch. Matteo Simione, to provide a detailed picture on the use of BIM for port infrastructures and to understand the reasons why, the adoption of this methodology, could have been a positive advantage for the design of a highly complex work.

BIM methodology for Marina di Gaeta

The definitive project of the Marina di Gaeta tourist port, following the procedure defined by the D.P.R. 509/1997 and slowed down by the achievement of regional authorizations, reaches a turning point when in 2017, following the Conference of Decisor Services, the BIM methodology is adopted to respond to specific requirements.
After the resolution of the urban planning problems (mainly due to the overlapping of two different plans – the PRG and the PRP of the commercial port) and geotechnical (born following the criticalities found on the backdrop and the consequent difficulties for the consolidation of the work) occurred before of the Decisory Conference, the use of BIM was fundamental for the verification of the choices made and for the definition of times and above all certain costs for the drafting of the final project. Furthermore, to ensure that all parts of the project were carried out regularly and without errors, respecting the estimated time and costs, a precise workflow was defined for the correct planning of BIM activities.

It was then decreed before proceeding with the drafting of the definitive project a BIM Mission, with the aim of setting specific objectives for the extrapolation of the drawings and supporting attachments to the descriptive documents, the definition of certain costs and the realization of a BIM model for the management and maintenance of the work.
Therefore, the uses of BIM were defined for the achievement of the set objectives, organizing and planning the modeling of maritime works, civil works and related MEP systems (mechanical and electrical).

It is important to underline that when using BIM for a job order, the organization, and therefore the setting, of the information modeling is of fundamental importance. In fact, there is rarely a single BIM model to refer to. Most of the time a myriad of models are made, mostly referred to the different disciplines, which will be merged into a single model, defined as "federated" by the UNI 11337 standard. This, simultaneously containing all the models, will allow coordination between them and to produce the necessary documentation to achieve the objectives set out by the client.

The coordination of the entire project was one of the main uses of BIM modeling. In particular, the main problems encountered in the transition from CAD to BIM were identified and resolved promptly with the necessary technical measures; the subsequent use was taken care of the verification of the information contents, through the validation of internal control cycles, in order to highlight any inconsistencies, verify the correspondence of the model with the final design and obtain georeferenced models among them.

Geometric checks were then performed, analyzing interferences or physical overlaps, through cycles of clash analysis. These allowed us to guarantee compliance with pre-established quality standards and to have a coordinated and validated model available.

The ultimate goal was to draw up a metric estimate computation directly from the models. Thanks to the DIGICORP software, MOSAICO and REMO, used in combination with Revit, it was possible to associate to each object of the digital information model a type parameter or a code, allowing to assign specific items from the regional price lists. In this way the item of calculation and the object are linked to each other, remaining connected and updated over time.

Through this workflow the calculation can be defined as verifier-proof, according to the Legislative Decree 50/2016, as all the information comes from a single informative database, with consequent coherence of the data among the products produced: models, sheets and calculations .

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