Civil Integrated Management (CIM) for Departments of Transportation, Volume 2: Research Report (2016) / Chapter Skim
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Pages 22-55
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22 CIM Case Studies The nationwide surveys conducted by the research team helped in shortlisting most of the candidate projects for case studies. Overall, 15 project representatives responded to the project survey, indicating their willingness to provide details.
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23 performed to capture the generalized trends and lessons learned from all the case studies. CIM implementation was analyzed in-depth for each of the case studies performed.
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24 GPS technology. Existing survey information was also obtained using Bentley maps to create and validate the project limits.
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25 6.1.f CIM Implementation Analysis -- Rotary Upgrade to Modern Roundabout Project • The rotary project, with smaller scope and lower complexity (no major structures such as bridges) , is designed up to 90% in 3D using Bentley InRoads.
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26 6.1.g Inferences The agency has been reasonably successful in implementing several CIM technologies and practices. This case study has helped deduce some important lessons.
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27 for the roadway and drainage, but had to develop additional bridge models because the design was carried out in 2D. As a result, 3D models of the bridge in the final design state and construction state (i.e., at the bridge staging area located 800 ft away)
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28 This difference in elevation arose because the bearing pads were not accounted for when the bridge was modeled at the bridge staging area. Making this discovery during the planning phase, rather than during the final move of the bridge was quite valuable.
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29 also plans to adopt quality level "A" subsurface utility engineering (SUE) to retrieve the geo-location of existing utilities.
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30 generally uses trucks equipped with a variety of pavement sensing equipment to obtain information on cracks, durability, and so forth, but LiDAR has not been deployed on the trucks because of cost-related issues. However, there are plans to deploy mobile LiDAR for as-built new construction projects.
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31 • Document the realized benefits and challenges. • Understand the design(er)
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32 6.4 Case Study 4: NYSDOT Kosciuszko Bridge Project 6.4.a An Overview of CIM Practices -- NYSDOT • NYSDOT uses digital information and CIM technologies on any project of any size if the project may benefit from the usage. Typically, NYSDOT finds that contractors are requesting the digital information to use with the construction technologies that they have, such as AMG.
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33 6.4.d CIM Implementation Analysis -- Kosciuszko Bridge Project • During the planning phase, the agency procured the services of a third-party consultant for collecting and supplying LiDAR data. However, this information was supplied for "information purposes only" and the contractor was instructed to use the plans and specifications from the Request for Proposal (RFP)
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34 revised its surveying specifications to enable field staff to use GPS-based inspection technologies for quality checks and quantity measurements. This step was critical to facilitate agency-wide adoption of this practice.
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35 The scope of work involved repairing 37 bridges, rehabilitating and replacing pavements (roads) , and adding on and off ramps.
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36 • Set the vision on the future and the tools the agency will be using; aim for enterprise-wide data management. • Create solid foundations for geospatially identified data.
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37 agency plans to monitor the performance benefits of using these technologies on this project. From an organizational standpoint, MassDOT has standardized the data collection requirements and specifications for model-based design.
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38 were functionally separate, the footprint of the bridge was exported to Civil 3D to visualize and analyze all the elements together, which helped the project team address some environmental concerns regarding the footprints of the foundations: scour and potential obstruction of flow in the channel. As the design was being updated (requiring a couple of iterations)
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39 weights, sheaves, panel boxes, and other electrical utilities. The team found it necessary and beneficial to integrate 3D modeling processes with the model development.
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40 This case study involved interviews with CRL (the owner) and four contractors, the latter representing the range of BIM maturity.
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41 CRL chose ProjectWise as its ECMS and eB as its EDMS; both pieces of software were developed by Bentley Systems, Inc. Selecting Bentley as a single vendor solution was controversial for two main reasons.
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42 to submit full as-builts. These contractors were also the only ones developing a BIM Execution Plan, as PAS 1192-2 stipulates8 (CRL requested this documentation on a voluntary basis)
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43 emy is not only a knowledge hub that gathers and communicates best practice, but it also acts as a lab where contractors can test the potential of new applications. Training Programs BIM training in Crossrail takes place at three different levels: (a)
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44 6.7.c BIM Use Once Crossrail's BIM environment was set up, CRL and its contractors started to operate and deliver its work within this environment. This section investigates BIM use in design and construction, BIM use in handover, measures of BIM use for each contractor, and Crossrail overall.
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45 coordination, (2) design submission, (3)
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46 scores (1.5 and 2, respectively) (Figure 6.15)
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47 # Title Description Phase* Value 1 Laser Scanning Capturing existing as-built environment into a model.
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48 proven to be one of the biggest challenges for both CRL and Crossrail contractors. 6.7.d BIM Return Measuring the return of BIM investment in Crossrail has proven to be one of the most difficult challenges for both CRL and the entire pool of contractors.
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49 tion. Output assessments have not yet been performed, and so this study can only define the upper and lower boundaries within which the values of BIM output indicators will fall (Figure 6.18)
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50 from a more informed and timely decision, which was however acknowledged as a major benefit. A second stage of this study involved a forecasted ROI analysis, where predicted savings for the FPP use case, over 4 years, and on four different sites, were calculated by projecting the realized costs and benefits from the first stage.
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51 roadway surface models rather than for drainage elements, utilities, or structures (such as bridges)
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52 more total stations and better control equipment are cited as the major barriers. Contractors have reported using equipment and software from vendors such as Trimble/TopCon systems.
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53 Agencies Asphalt IC Specs Soils IC Specs FHWA Asphalt Soils AASHTO Asphalt-Soils combined - PP 81-14 Asphalt-Soils combined - PP81-14 Central Federal Land HD Asphalt Eastern Federal Land HD Asphalt Alaska DOT HMA California DOT HMA (draft) , CIR (draft)
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54 Some of the nationwide best practices of GIS applications have already been reviewed during this project including the following: • Utah DOT's UPlan • South Carolina DOT's Project Screening Tool • Washington DOT's State Route Web Tool • Florida DOT's Environment Screening Tool Other Innovative CIM Technologies Technologies examined thus far have already found their strategic significance for digital project delivery and asset management. This section describes other emerging technologies that have been studied in only a few instances, but that hold greater prospects for the future.
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55 • Defining software use to avoid interoperability issues and information loss. • Ascertaining pertinent federal and state agency laws impacting use of digital intellectual property on the projects.
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