“Using BIM Technology to Reduce the cost of Highway Construction Presented by Tate Jones President LandAir Surveying Company

LandAir Surveying Company About the Firm Professional Surveying License’s in Alabama, Georgia, Florida and South Carolina Providing Land Surveying Services since 1988 Transportation Surveying Services since 1998 Providing Laser Scanning Services since 2004 Providing BIM Services Since 2008 We work with all types of Lidar Including Terrestrial, Mobil, Helo, Fixed wing. Work in all Bentley and AutoDesk BIM software's We work with Faro, Leica, and Z&F Scanners  

BIM…Building Information Modeling What is the process? Collect all existing survey data in 3D and model it. Build all the proposed Design elements in 3D and create models. Put the data together and measure the results with “CLASH” Detection. Essentially you build the project in a computer prior to building it in the real world. Savings with this process are Significant! Time & Money.

Presentation Objectives What is BIM? Where did it come from? How does BIM Apply to Transportation, Construction & Design? Project work flows. 3D Utilities.. Understand the 3D Data Capture Process Modeling Process Clash Detection Process Benefits & Cost

Technology Changing the World of Land Surveying. Collecting Existing Conditions Technology Changing the World of Land Surveying. 3D Data Collectors Lidar & Photography

Future of Aerial Data Capture Is Here Quad copter Photographic System Fixed Wing System Terrain Mapping Hex copter Bridge Inspection Platform

Multiple Lidar Data Platforms Motor Vehicle Highways Levees Developed Environments Off-Road Karst Topography Beaches Trails We have the ability to place the platform on an vehicle capable of supporting it’s weight. On the Water Coastal Environments / Streams Bridges

What is 3D Laser Scanning? “LiDAR”…..Light Detection and Ranging. High speed lasers. 50,000 – 1,000,000 points per second. Collecting geometric data point. Precisely registered in space. “Point Cloud”

Light weight close range scanner Scanners What are they and What do they look like? Faro Focus Scanner Light weight close range scanner More Laser scanners Riegl VZ 400 Versatile Scanner Z&F 5010

Current State of the Science Laser Scanners Time of Flight Long Range Laser Used outside & Inside Phase Based Scanner High Speed Laser Used Inside This slide are examples of Terrestrial Laser Scanners 6200 Close Range scanner 300,000 PPS Effective Range 30 meters C10 Laser Scanner 50,000 PPS Effective range 100 meters $

Scanning and Modeling for Transportation Interstate Laser scan

Simple 1 day Bridge Scan

Helicopter Lidar Scan and Surface Model

Reconstruction Project ALDOT & LandAir Surveying Company THE PROJECT 3D Visualization Birmingham Al. CBD Reconstruction Project 3D Analysis by ALDOT & LandAir Surveying Company

The Birmingham CBD Project Entities in the model; Existing roadway and bridges, adjoining mainline, light poles, power lines, roadway elements, columns, bents, footings Geotech information. We used Revit to model substructure and Descartes to model The bridge deck surfaces. This workflow was chosen due to the expertise of the existing cad techs. Modeled areas included 1400 bridge columns, 8 miles of bridges, 1 tunnel, 100’s of light poles, miles of underground utilities, adjoining buildings and improvements within the design envelope.

The Project Flow 3D Data Collection using… Helicopter, Laser Scanner, Fixed Wing, County GIS. Process and check the data + .07 all data combined. Produce Standard Bentley InRoads Plans. Model the existing data into useable 3D cad files. Model the future design plans in 3D cad format. Compare the existing and proposed and check for Interference Clash Produce Clash Detection Files Give information to the designers and contractors

Models

Current Model Existing Conditions of CBD Project

The 3D Design Advantages You can drop a 3D pointcloud into in to Micro Station and design thru the data. You can check the data and the design against the existing conditions. You get all the data not just a 25’ grid that is the standard. You don’t have to return to the field to view the actual conditions. 3D Design files can be built into models and videos to assists in public presentations. The Cost to you Training Computer Software Learning Curve

Proposed Design Models

CLASH DETECTION WORKFLOW Alabama Department of Transportation I-59/I-20 Bridge Replacement (CBD)

Mapping Utilities in 3D

Clash Detection

Clash Detection Step 1: Overlay proposed design onto asbuilt

Clash Detection Step 2: Select sets of elements to clash

Clash Detection Step 3: Run the Clash Detection algorithm

Clash Detection Hard clashes = 67 Soft clashes = 361 Step 4: Perform “soft clashing” for comparison Hard clashes = 67 Soft clashes = 361

Grouping clashes Select clashes and add to a group you create. Or, allow Navigator to create groups based on which elements are clashing.

Grouping Clashes by Element

Creating Markups

Viewing/Editing Markups

Reviewing Clashes

Results can be exported into an Excel file.

Slide from Published Presentation of Wisconsin DOT

What is the ROI of 3D Preconstruction Analysis? Wisconsin Study Write up by FHWA

Mitchell Interchange I 94

Mitchell Interchange I 94

Sample ROI calculation The following ROI calculation is meant only to provide a theoretical example. The assumptions and results come from Autodesk Consulting Assumptions: BIM implementation costs average 0.5 percent of the total program budget (average accepted by the industry as standard for major capital projects/programs). Cost overruns in project delivery may usually be reduced by 15 percent (a conservative estimate) from industry average of 20–24 percent, primarily due to a reduction in RFIs, addenda, and engineering change orders. Savings from reduced rework after project close is estimated at 5 percent of program budget. Savings due to better visibility of the contractors’ cost breakdown is factored into both the bidding and negotiation phases, as well as controlling the as-built. An average saving of about 5.5 percent of the total program budget based on industry experience in major capital projects where BIM is implemented. The resulting savings of using BIM on this theoretical program over traditional methods is approximately 4 percent, meaning a return of about 20X the original investment (ROI = 20X). This theoretical ROI calculation may be conservative, as it considers only selected aspects of the savings potential. There are many more aspects (such as reduced work for preparing tender documentation, handling RFIs, and more efficient operation and management). Also, these savings are based on a single program over three years, whereas there are likely to be other programs that will use the BIM

Total Cost Savings from Pre Construction 3D Analysis $9.5 Million Dollars! 30:1 ROI !!! DIN Category Estimated Percent of Reduction Total Cost ($ millions) Average Cost Per Issue   General Structures 30.5% 6.8 $45,674 Roadway Drainage 25.5% 5.7 85,631 Wet Utilities/Drainage 11.1% 2.4 27,120 Bridges 8.0% 1.8 15,557 Noise Wall 125,909 Retaining Wall 7.7% 1.7 21,818 Earthwork 4.5% 1.0 59,220 Electrical/IT S/FT MS 2.6% 0.6 Traffic 2.1% 0.5 18,174 Sign Structures 0.1% 0.02 738 Design issue notices (DINs) are changes to the design that become necessary due to conflicts or issues identified during construction.

Other Benefits Crane Radius Clash Detection

Mobile Scanning Visualization for public meeting

Why is BIM becoming main stream? $9.5 million savings on an interchange project! Most Major Engineering, Construction and Design firms are quickly moving towards BIM technology. Follow the money!

LandAir Surveying’s YouTube Channel Questions or Comments? Tate Jones (770) 730 9950 tjones@lasurveying.com See more at: www.LandAirSurveying.com LandAir Surveying’s YouTube Channel Good by page