City modeling and BIM in infrastructure planning

Transcription

1 The City Rail Loop City modeling and BIM in infrastructure planning Tiina Perttula, Jukka Tarkkala

2 The City Rail Loop

3 Idea and goals of the City Rail Loop The majority of commuter trains to run in a tunnel under Helsinki city center. Gives more space to long distance trains. Stations: Töölö, Keskusta ja Hakaniemi Max speed 80 km/h 3 3

4 4 4

5 5 5

6 Longitudinal section schematic Töölö -17 m bsl Keskusta -45 m bsl Hakaniemi Pasila +22 m asl Hakaniemi - 29 m bsl 6 6

7 7 7

8 BIM: Before starting the project

9 Before starting planning phase Decision to do planning phase and construction design phase using modeling was made in 2012 Open workshops for consultants and contractors late 2012 Modeling strategy early 2013 Goals and the use on model Process Actors and roles Quality Communication Education 10 10

10 Before starting planning phase Collect data for initial data model, summer 2013 Project portal for data, October 2013 possibilities to open models via data bank ICT and BIM guidelines for the project was finished early

11 Goals and challenges of using BIM

12 Goals of using BIM Combining Models - Combining new Building- and Infrastructure models - Compiling new structures with existent structures Quantities & Mass calculation - Target: real time quantities Continuous City model and collaboration with interest groups - Authorities - Related projects - Underground City Plan Generating information package that suits for maintenance systems 13 13

13 Challenges of using BIM Peculiar Project: - Combining Infra- and Building structures - Open LandXML/IM3 format - Huge amount of initial data - Dozens of interest groups 14 14

14 Initial data Initial data is basic information of the existing environment or other documents that are needed before starting the project design Initial data can be for example in pfd, dgn, dwg, doc, tif, jpg formats Representing data in computer interpretable formats All the computer applications used in the project should be able to utilize initial data Everyone in the project should have access to initial database (project bank) 15 15

15 Initial data, approximate model of existing tunnels Scanned model of existing tunnels 16 16

16 BIM Process and Operators

17 Requirements for BIMprocess 1. Common rules 2. Initial data management 3. Information flow and problem solving 19 19

18 Requirements set for designers BIM Strategy - Goals - Usage Of BIM - Information Transfer rules Design guidelines - Design Process - Participants and operators ICT-guidelines - BIM processes and procedures - Problematic parts - Detail of modelling 20 20

19 BIM based processes There are no ready processes: - Updating this amount of initial data - Combining Infra and Building -models - Cost estimation 21 21

20 Problem solving methods Before starting Planning Authorities Client Design coordinator Cost calculation Client BIM group Designer BIM Group Design teams 22 22

21 Combination models 23 23

22 Combination models 24 24

23 Experiences

24 Planning the Helsinki City Rail Loop, Experiences during General Data about present state When you collect information, do it well Wrong information can be dangerous Distribute the information to owners, authorities, other planners Underground spaces and structures are laborious to model and inspect, do it as well as possible at once XY is not enough, Z and attributes are needed also (case: cables) Planning with BIM Plan the processes well, somebody always knows the best work flow and alternatives Determine the purpose of planning first, determine the actions only then Talk about the problems, somebody always knows the solution (or wait for a while) BIM: Don t wait, but act yourself and inform other people Do sketches, but accept the idea that they are not final design models Don t use too large elements 29 29

25 Planning the Helsinki City Rail Loop, Experiences during Examples Borehole accidents 1. A close call to structures of underground public transport, practically no damages 2. Borehole through the roof of an underground garage, minor damage 3. Borehole through the wall of a rock tunnel, minor damage It is important to Maintain and update data about underground structures Spread the information Be open with the mistakes and damages 30 30

26 Planning the Helsinki City Rail Loop, Experiences during Examples There s a lot of simulations 1. Air pressure, ventilation 2. Temperature 3. Smoke and fire propagation 4. Pedestrian 5. Emergency exit, evacuation 6. Rock mechanics 7. Ground water flow 8. Noise and vibration analysis 9. Electricity and train operation 10.(Later: lights, acoustics) State of art My understanding is that experts make their own models Architecture and engineer models support in identifying the cases and in further modeling 31 31

27 Planning the Helsinki City Rail Loop, Experiences during Examples 1. Work flows are working and they are revised when needed 2. IFC- and DWG-models are widely used 3. LandXML (Inframodel) format is used only in rail alignment 4. City of Helsinki use Microstation (dgn) successfully also with IFC and DWG 5. Don t use too large models or too large elements, because it is difficult to identify the hotspots (the right clashes) 6. Conversion of source data works fine usually but not in all cases 7. Communication within design groups as usual, collaboration server is not used 8. City of Helsinki has very strict policy with computer security, this causes delay but can be worked with 32 32

28 Contacts Finnish Transport Agency Project manager Jussi Lindberg PL HELSINKI tel City of Helsinki Project manager Jukka Tarkkala PL HELSINGIN KAUPUNKI tel Client BIM Group Project office: Mannerheimintie C, 2. floor 34 34