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The indoor swimming pool facility of Rajamäki

Rajamäen Uimahalli Oy, Fira Oy, Rakennuttajatoimisto Valvontakonsultit Oy, Arkkitehtitoimisto Lehto Peltonen Valkama Oy, WiseGroup Oy, Granlund Oy, Karawatski Oy, SCM

From Big Room to the construction site

The indoor swimming pool project of Rajamäki in Nurmijärvi is a combination of constructing new and renovating old structures. The old swimming pool was built in 1974. After completion, the new indoor swimming pool will double the spaces. The project includes six indoor swimming pools, gym, cafeteria, group training facilities and office spaces. The goal of the indoor swimming pool is to be the most personalized swimming facility offering new experiences by using among others audio visual techniques. Ecologicality and energy efficiency have been the keystones in the design phase. According to energy analysis the new facilities will use only about 10% more bought energy than the old one.

The indoor swimming pool facility in Rajamäki is the first indoor swimming pool project where building information models will be both in design and construction phases and even in facility management. The modeling has been executed using COBIM 2012 as a guideline for modeling accuracy. All the design disciplines designs have been done by using modeling tools: architectural, structural, MEP and geological. The inventory model for the old part has been done based on laser scanning and the old drawings. The designers had both inventory model, combination model and point cloud in use. Management contracting contractor has modeled the water treatment pipes for clash checks that were designed by traditional means. Building information model based site plans were used at the construction site.

Building information models were used actively during the whole project. At its best there were 20 different users for the combination model that was shared through an online cloud service. The special character of the project was the integrated project delivery method in the implementation design phase where building information modeling has been in a central role. Extreme collaboration -scheme of things, originating from airplane and rocket design processes, has been used to speed up the implementation design phase, and simultaneously a remarkable trimming for the design was executed because of saving needs. Intense Big Room -working with building information models has enabled executing implementation design processes and reaching the saving goals simultaneously with actual construction process. The aim of the Big Room –sessions was to provide added value to the project together with the client.

One of the biggest advantages of the usage of BIM was the visual and understandable material for decision making process in the conceptual design phase, that actually led to decision to initiate the project. Secondly the models enabled to reach significant saving goals in very tight schedule using Big Room methods. The third advantage was the use of models in the clash check meetings between foremen of subcontractors for HVAC, electrical and water treatment. In addition the models have been used in the routines of every day operations at the construction site. The building information models have been integrated to be an extension for the daily operations.

All the design disciplines have done model base designing. Building information has been used to coordinate as the main tool by architect, BIM coordinator and design coordination of management contracting contractor. In the project there has been both visual and rule based quality management. Architectural model has been used during the whole project in design operations, visualizations and quantity take-offs. MEP models has been used to fit the models together, quantity take-offs, sequencing the works and planning the order of the works and in lightning planning. Geological model has been used to support the design process and to illustrate surfaces in the beginning of the project. The models are used on a daily basis at construction site. The management contracting contractor uses models for work planning, scheduling, controlling and organizing together with sub-contractors. Models have been used to print pictures for construction jobs, the model based site plan is used for orientation and quantities are calculated from the models. Models are used also for sub-contracting negotiations, as attachment in requests for bids and to approve the production plans by the designers. Fitting together the implementation designs of steel stairs and existing structures was done by importing layout points from the field. Realization information was documented directly into the model in correct locations, building information models are used on tablets directly at the job site. Documentation of the realized information has already been useful for inspecting the structures that have been hidden.

In spite of the success there is also improvement to be done at every sector. COBIM provides only a weak framework for structural modeling of old existing and changing structures. As a result the structural designer was not obligated to model these structures. When the design and construction works have proceeded it has been noticed that the structural model of the renovated parts would have been major benefit for the project and that is something that has to be improved in the future. The benefits of using building information models as part of the integrated and interactive design process are evident, however, there is still a lot of potential considering real time quantity take offs and information and project status visualization for the design team. The communication between designers and managing open topics could be executed using BCF format if the tools could be fine-tuned to be well functioning and to support design process in a better way.

Project Owner: Rajamäen Uimahalli Oy
General contractor: Fira Oy
Architect: Arkkitehtitoimisto Lehto Peltonen Valkama Oy
Structural design: WiseGroup Oy
Detailing: WiseGroup Oy
HVAC design: Granlund Oy
Electrical design: Karawatski Oy
Inventointimallinnus + tietomallikoordinointi luonnos- ja yleissuunnitteluvaiheessa: Sweco Oy
GEO detailer: Ramboll Oy
Supplier: SCM
Subcontractors: SCM