Model based infra construction

RYM PROGRAM
PRE
KEYWORDS
as-built, construction, design,
infrastructure, machine
control, PRE
PARTICIPANTS
Destia Oy
Terrasolid
NCC Roads Oy
Lemminkäinen Infra
Model based infra construction
CONTACT
The use of 3D machine control systems in infra construction is known for its verified
benefits - we have several years experince in that. Yet, there have been some
serious obstacles that slows down the adoption of new model based technologies and their
wide possibilities. Lack of discipline construction design requirements for model based
construction and insistence of traditional quality control procedures should not be among
of those anymore.
RESULTS
Destia’s most remarkable project results:
Pasi Nurminen
1. Specifications and requirements for road and railway design structural models: explicit
guidelines for designers and an easy procurement tool for infra owners. A practical
guide for producing an exhaustive and continuous model, ready and compatible for use of
machine control systems. Includes major earth and layer structures.
Mika Jaakkola
MORE INFO
2. Specifications and requirements for model based quality control procedure: guidelines
for process utilizing 3D models and machine control systems in as-built
measurements. The process and its requirements have been studied and developed in
several pilot projects. The latest pilot project is Riippa-Eskola RU2 railway project of 85 M€,
where model based QC is in use and approved by the customer.
Model based production and
quality assurance in RiippaEskola RU2 railway
construction project
3. Comprehensive model based road rehabilitation process: from initial model to 3D-guided
pavement. The first study within the Kt51 motorway project 2012 showed that mobile laser
scanning can create a reliable initial model which was a basis for optimized design for
model-based milling. The second pilot within the Vt13 road rehabilitation project 2013
included the design and construction of the third lane as well as the repair of the
pavement’s shape entirely. The accurate, up-to-date initial model was the basis for design
and all actions done. All work phases used model and 3D-machine control. The quality
was exceptionally good and got excellent feedback from the customer.
EFFECTS
New specifications and requirements for model based infra sector design and construction
are needed. Guidelines are practical and functional: they are piloted within several
projects.
Written guidelines are available tools for infra owners’ procurement. Exhaustive guidelines
will eliminate misunderstandings and conflicts caused by them. They will point out the level
of quality customer demands.
Better designs and continuously modelled structures will help infra contractors to adopt
and use machine control and the other model based tools. Surveying is also easier and
more reliable. Mass calculations are more reliable. Model based quality control reduces
waste work, increaces productivity and safety.
Model based road rehabilitation provides better quality and cost-effectiveness.
FUTURE OPPORTUNITIES
The infrastructure owners play a significant role: using common guidelines and
requirements uncompromisingly in their procurement will result in better designs, better
chances to take advantage of new technology, better outcome and better productivity.
The Common InfraBIM Guidelines will be published by Building Information Ltd. and
maintained as effort of buildingSMART Finland Infra community.
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