Browsing by Author "Ojutkangas, Terhi"
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- 3D-mittaustekniikka korjausrakentamisessa
Insinööritieteiden ja arkkitehtuurin tiedekunta | Bachelor's thesis(2008) Ojutkangas, Terhi - Tietomallinnuksen käyttö ja mahdollisuudet Länsimetron rakennesuunnittelussa
School of Engineering | Master's thesis(2012) Ojutkangas, TerhiMany designers have mistaken the plain usage of 3D tools in construction design as Building Information Modelling (BIM). However, the decision to use BIM requires a new kind of approach to designing and building constructions. All parties in a BIM project need to agree to use Building Information Modelling. BIM is used to enhance the design process and to facilitate the making of analysis, going beyond just producing two-dimensional drawings. The extension of the Helsinki underground line from Ruoholahti to Matinkylä is called the Länsimetro. In this thesis how BIM can be utilized in the structural designing of the Länsimetro was studied. The modelling programs surveyed closer were limited to the ones used in the actual design of the Länsimetro. Special attention was paid to the simulation of the rock surface. Preliminary plans were added to the actual plans regarding the handling of the rock surface as the tunnels were measured by means of laser scanning. Measurement data from built structures or the rock surfaces surrounding the structures to be built can be measured with laser scanning, obtaining a point cloud of the measured structures. The point cloud can be edited into a DWG format file that can then be used as a reference drawing within modelling software. It was observed that a number of BIM features cannot be utilized if BIM is only partially implemented in the project. Not all parties to the Länsimetro project used modelling because the official design data was ordered in a two-dimensional format and BIM was not required. The parties using modelling did, however, find it helpful because of the challenging geometry of the Länsimetro project. Design solutions used in the Länsimetro differ from ones used in ordinary building constructions thereby causing new challenges. Many contradictions emerged from the three-dimensional model that has not been noticed in two-dimensional drawings.