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

2. 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

3. 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.

5. 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

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

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

9. 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

10. 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”

11. 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

12. 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 $

13. Scanning and Modeling for Transportation
Interstate Laser scan

14. Simple 1 day Bridge Scan

15. Helicopter Lidar Scan and Surface Model

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

17. 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.

18. The Project Flow 3D Data Collection using…
Helicopter, Laser Scanner, Fixed Wing, County GIS.
Process and check the data 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

22. Models

23. Current Model Existing Conditions of CBD Project

24. 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

25. Proposed Design Models

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

27. Mapping Utilities in 3D

28. Clash Detection

29. Clash Detection
Step 1: Overlay proposed design onto asbuilt

30. Clash Detection
Step 2: Select sets of elements to clash

31. Clash Detection
Step 3: Run the Clash Detection algorithm

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

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

34. Grouping Clashes by Element

35. Creating Markups

36. Viewing/Editing Markups

37. Reviewing Clashes

38. Results can be exported into an Excel file.

39. Slide from Published Presentation of Wisconsin DOT

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

41. Mitchell Interchange I 94

42. Mitchell Interchange I 94

44. 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

45. 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.

46. Other Benefits
Crane Radius Clash Detection

47. Mobile
Scanning
Visualization for public meeting

48. 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!

49. LandAir Surveying’s YouTube Channel
Questions or Comments?
Tate Jones
(770)
See more at:
LandAir Surveying’s YouTube Channel
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