The New Children's Hospital

Ramboll

 

The best children’s hospital in the world is created with BIM

 

 

The new children’s hospital in Helsinki is a big project, starting from the size of it. In the 48 000 square meters and 230 000 cubic meters there are 11 operating theatres, room for 150 patients, and large pieces of art, which also are modeled. The hospital is due to put into operation during 2017. The project is very interesting to the public and media.

BIM was utilized already in the general design phase, and the models were used for creating cave models, with which the users, like hospital employees, have visited their future workplace virtually. The BIM models have enabled a child’s perspective for studying the premises. In the hospital, there are a lot of glass surfaces. BIM was used in studying views and patient privacy is thus secured.

The hospital is situated on a site where the ground and rock surfaces are close, and the adjacent lots hold many tunnels and excavations. Geo models, originally created for different purposes, were used as initial data for design.

Construction was started before the design was finished, and this required a lot from the design team’s expertise, tools and processes. BIM based way of working allows faster design and enables optimizing the space reservations.

BIM has proved to be a good tool for managing information, for instance listing doors and windows. The special doors and windows in a hospital create a significant cost item, and the owner can follow it almost in real time with BIM.

BIM status data was used in following the design progress, and the model was used in task coordination.

In the beginning, there were two frame alternatives in the project for cost estimation: a fully cast in place concrete frame structure and the chosen alternative, where upper structures are composite elements. The alternatives were worked on in one Tekla model and they were identified with the phase variable. 

All hollow-core and filigree slabs were fabricated using only Tekla model, with no additional drawings. Also the steel parts of the composite elements were fabricated using DSTV-files to automatically control the  CNC-machinery.  

The Delta beams by Peikko are ready with inside threads for safety railings. BIM has been a perfect way to visualize construction phasing, and the placing of safety railings is thus clear in the planning phase.

Different design disciplines combine their models in weekly meetings. In the site, BIM has been in truly versatile use. Estimating, task planning, and installation order have all been BIM based. Installation visualizations are drawn from the models and contractors execute inspections and measurements with the model.

The developer has also been actively following and managing the BIM process. In a project of this complexity, a BIM coordinator has an important role. Hospital construction experts from Sweden were engaged the  project, and in this cooperation, Tekla Model Sharing was used.

Helsinki University Hospitals have their own BIM guide, which was followed.

 

High standards of a hospital environment

 

The site plan was created with Trimble SketchUp. In site planning it is essential to phase different activities, and in this BIM has proved to be very useful.

In the construction of a hospital e.g., dust has to be very carefully handled. In a BIM model, it is easy to see which duct system serves a certain area and where there is need for dust control, when part of the building is under interior finishing phase.

 

Project parties

 

Developer: Haahtela-rakennuttaminen Oy 

Architect: SARC, Reino Koivula Oy

General contractor: SRV Rakennus Oy

Structural design: Ramboll

HVAC design: Ramboll

Electrical design: Granlund Oy

BIM coordination: Byggnadsekonomi

Fixed hospital equipment: Granlund  

Steel beams and columns: Peikko Finland Oy

Precast concrete elements: Parma Oy

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