Integration of Geotechnical Design and Analysis Processes Using a Parametric and 3D-Model Based Approach

Advanced Engineering Informatics

Flurl

Jubierre

et al. 2014

a b s t r a c tThe planning of large infrastructure projects such as inner-city subway tracks is a highly collaborative process in which numerous experts from different domains are involved. While performing the planning task, widely differing scales have to be taken into consideration, ranging from the kilometer scale for the general routing of the track down to the centimeter scale for the detailed design of connection points. Currently there is no technology available which supports both the collaborative as well as the multiscale aspect in an adequate manner. To fill this technological gap and better support the collaborative design and engineering activities involved with infrastructure planning, this paper introduces a new methodology which allows engineers to simultaneously manipulate a shared multi-scale tunnel model. This methodology comprises two main aspects. The first aspect is a multi-scale model for shield tunnels, which provides five different levels of detail (LoD) representing the different levels of abstraction required throughout the planning progress. The second aspect is a conceived collaboration platform, which enables simultaneous modifications of the multi-scale model by multiple users. In existing multi-scale approaches, where the individual representations are stored independently from each other, there is a high risk of creating inconsistencies, in particular in the highly dynamic collaborative planning context. To overcome this issue, the concept presented in this paper makes use of procedural modeling techniques for creating explicit dependencies between the geometric entities on the different LoDs. This results in a highly flexible, yet inherently consistent multi-scale model where the manipulation of elements on coarser LoDs results in an automated update of all dependent elements on finer LoDs. The proposed multi-scale model forms a well-suited basis for realizing the collaboration concept, which allows several experts to simultaneously manipulate a shared infrastructure model on various scales while using the different design tools they are accustomed to. The paper discusses in detail the principles and advantages of the proposed multi-scale modeling approach as well as its application in the context of collaborative tunnel design. The paper concludes with a case study of a large infrastructure project: a new inner-city subway tunnel in Munich, Germany.

Section: Cross-lod Consistency Preservation Using Procedural Geometrymentioning

confidence: 99%

Synchronous collaborative tunnel design based on consistency-preserving multi-scale models

Advanced Engineering Informatics

Flurl

Jubierre

et al. 2014

“…Today, these systems are used mainly in the mechanical engineering domain, but there is also increasing adoption in the Architecture, Engineering, and Construction (AEC) industry (Lee et al., ). In particular, parametric modeling concepts have recently been applied to create highly flexible and adaptable models of infrastructure facilities, such as bridges and roadways (Ji et al., ; Ji et al., ; Obergriesser et al., ; Ji et al., ). The application of parametric modeling concepts makes it possible to embed domain knowledge in the generation of the model, thus fostering re‐usability (Lee et al., ).…”

Section: Background/related Workmentioning

confidence: 99%

Multi‐Scale Geometric‐Semantic Modeling of Shield Tunnels for GIS and BIM Applications

Computer aided Civil Eng

Kolbe

Donaubauer

et al. 2014

Self Cite

144

The planning of large infrastructure facilities such as inner‐city subway tracks requires the consideration of widely differing scales, ranging from the kilometer scale for the general routing of the track down to the centimeter scale for detailed design of connection points. On the one hand this implies the utilization of both, Geographic Information Systems (GIS) as well as Building Information Modeling (BIM) tools, for performing the required analysis, modeling, and visualization tasks. On the other hand, a sound foundation of handling multi‐scale representations is required. Although multi‐scale modeling is already well established in the GIS field, there are no corresponding approaches in Infrastructure BIM so far. However, multi‐scale concepts are also much needed in the BIM context, as the planning process typically provides only rough information in the early stages and increasingly detailed and fine‐grained information in later stages. To meet this demand, this article presents a comprehensive concept for incorporating multi‐scale representations with building information models, with a particular focus on the geometric‐semantic modeling of shield tunnels. Based on a detailed analysis of the data modeling methods used in CityGML and the requirements present in the context of infrastructure planning projects, we discuss potential extensions to the BIM data model Industry Foundation Classes (IFC) for incorporating multi‐scale representations of shield tunnels. Particular emphasis is put on providing means for preserving the consistency of the representation across the different Levels‐of‐Detail (LoDs), while taking into account both semantics and geometry. For realizing consistency preservation mechanisms, we propose to apply a procedural geometry description which makes it possible to define explicit dependencies between geometric entities on different LoDs. The modification of an object on a coarse level consequently results in an automated update of all dependent objects on the finer levels. Finally, we discuss the transformation of the IFC‐based multi‐scale tunnel model into a CityGML compliant tunnel representation.

“…Such models, which are referred to as procedural models or construction history models, combine the use of dimensional and geometric constraints for defining flexible 2D sketches, with the concept of a procedural definition of complex 3D models through the subsequent use of geometric operations such as extrusion, rotation and Boolean operations (Mun et al 2003, Stiteler 2004, Pratt et al 2005, Koch & Firmenich 2011. Parametric modeling concepts have recently been applied to create highly flexible and adaptable models of infrastructure facilities, such as bridges and roadways (Ji et al 2010, Obergriesser et al 2011, Ji et al 2013. These techniques facilitate a step-wise development of the infrastructure model evolving from a coarse level of detail to the finer ones.…”

Section: Procedural Model-based Methodology For Consistency Preservatmentioning

confidence: 99%

Transferring Multi-Scale Approaches From 3d City Modeling to Ifc-Based Tunnel Modeling

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

Kolbe

Donaubauer

et al. 2013

Self Cite

ABSTRACT:A multi-scale representation of the built environment is required to provide information with the adequate level of detail (LoD) for different use cases and objectives. This applies not only to the visualization of city and building models, but in particular to their use in the context of planning and analysis tasks. While in the field of Geographic Information Systems, the handling of multi-scale representations is well established and understood, no formal approaches for incorporating multi-scale methods exist in the field of Building Information Modeling (BIM) so far. However, these concepts are much needed to better support highly dynamic planning processes that make use of very rough information about the facility under design in the early stages and provide increasingly detailed and fine-grained information in later stages. To meet these demands, this paper presents a comprehensive concept for incorporating multi-scale representations with infrastructural building information models, with a particular focus on the representation of shield tunnels. Based on a detailed analysis of the data modeling methods used in CityGML for capturing multiscale representations and the requirements present in the context of infrastructure planning projects, we discuss potential extensions to the BIM data model Industry Foundation Classes (IFC). Particular emphasis is put on providing means for preserving the consistency of the representation across the different Levels-of-Detail (LoD). To this end we make use of a procedural geometry description which makes it possible to define explicit dependencies between geometric entities on different LoDs. The modification of an object on a coarse level consequently results in an automated update of all dependent objects on the finer levels. Finally we discuss the transformation of the IFC-based multi-scale tunnel model into a CityGML compliant tunnel representation.