Model Based Quality Assurance Process in a Infra Construction Project - Case Riippa-Eskola RU2 -Double Rail Project

The model based quality assurance method has been developed to replace traditional manually made quality measurements. The idea is to use the excava-tor's machine control system to document the accu-racy (height and width) of the road at the same time as the structure is completed. This new method has been used for quality assurance for cuttings, em-bankments and road layers mainly on road construc-tion sites. The aim of this pilot project was to prove the functionality of the model based quality control method also on a rail construction site, where quality requirements are stricter. The accuracy and reliabil-ity of the method was verified by making manual total station measurements. After the validity of the method was proven, it was fully taken over for quali-ty control in the Riippa-Eskola RU2 construction project. The usability of the Inframodel 3 format was also tested in a model based infra construction process.