3D Laser Scanning for Modeling / Monitoring Geohazards3D Laser Scanning for Modeling / Monitoring Geohazards3D Laser Scanning for Modeling / Monitoring Geohazards3D Laser Scanning for Modeling / Monitoring Geohazards

by:by:Tom Rayburn, PS& Richard MaysTom Rayburn, PS& Richard Mays

Why Scan?Why Scan?

1 When the survey measurements must be non-contact1 When the survey measurements must be non-contact1. When the survey measurements must be non-contact

2. When the survey has complicated content

3. When the site is hazardous to occupy

1. When the survey measurements must be non-contact

2. When the survey has complicated content

3. When the site is hazardous to occupy

4. When the site has limited access or restricted availability (i.e. only accessible during limited time windows)

5 When scanning provides added confidence level A typical scan will contain

4. When the site has limited access or restricted availability (i.e. only accessible during limited time windows)

5 When scanning provides added confidence level A typical scan will contain5. When scanning provides added confidence level. A typical scan will contain millions of points and yet only hundreds or perhaps thousands of points are extracted and provided to our clients. For each point extracted there will be scores of points that support the results. Compare this to a discreet point

h i i i t i i it t it

5. When scanning provides added confidence level. A typical scan will contain millions of points and yet only hundreds or perhaps thousands of points are extracted and provided to our clients. For each point extracted there will be scores of points that support the results. Compare this to a discreet point

h i i i t i i it t itsurvey where an erroneous or a suspicious point may require a revisit to site, even if it is to prove that you were correct. survey where an erroneous or a suspicious point may require a revisit to site, even if it is to prove that you were correct.

Scanners UtilizedScanners Utilized

Leica ScanStation 2Leica ScanStation 2 Riegl RMS-360Riegl RMS-36050,000 Points Per Second

300m Range±4mm Accuracy (Raw Data)±2mm Accuracy (Modeled)

50,000 Points Per Second300m Range

±4mm Accuracy (Raw Data)±2mm Accuracy (Modeled)

g12,000 Points Per Second

200m Range±6mm Accuracy (Raw Data)±3mm Accuracy (Modeled)

g12,000 Points Per Second

200m Range±6mm Accuracy (Raw Data)±3mm Accuracy (Modeled)

Survey Remote/Hazardous Areas SafelySurvey Remote/Hazardous Areas Safely

I-64 / I-77 Retaining Wall Deformation MonitoringI-64 / I-77 Retaining Wall Deformation Monitoring

I-64 / I-77 Retaining Wall Deformation MonitoringI-64 / I-77 Retaining Wall Deformation Monitoring

Scanner Trailer Built Specifically for the ProjectScanner Trailer Built Specifically for the Project

The Scanner Trailer was designed to provide the necessaryheight to scan all the walls from the eastbound shoulder

while maintaining maximum stability for the scanner.

The Scanner Trailer was designed to provide the necessaryheight to scan all the walls from the eastbound shoulder

while maintaining maximum stability for the scanner.

17 ft

.

Point Cloud of Road Surface & Wall SectionsPoint Cloud of Road Surface & Wall Sections

Scanner Position

Wall Sections Modeled from Scan DataWall Sections Modeled from Scan Data

Section View of Modeled Wall SectionSection View of Modeled Wall Section

Other Projects of InterestOther Projects of Interest

ODOT / University of Akron Slide MonitoringODOT / University of Akron Slide Monitoring Mine Site Before & After Construction ScansMine Site Before & After Construction ScansODOT / University of Akron – Slide MonitoringODOT / University of Akron – Slide Monitoring Mine Site – Before & After Construction ScansMine Site – Before & After Construction Scans

ODOT / University of Akron – Slide MonitoringODOT / University of Akron – Slide Monitoring

POINT CLOUD SHOWING 3 SCAN POSITIONS & DATA COVERING ENTIRE JOB SITE

POINT CLOUD SHOWING 3 SCAN POSITIONS & DATA COVERING ENTIRE JOB SITE

COLORIZED POINT CLOUD SHOWING REALISM OF DATACOLORIZED POINT CLOUD SHOWING REALISM OF DATA

3D VIEW OF SECTION & PIPING FROM AUTOCAD DELIVERABLE

3D VIEW OF SECTION & PIPING FROM AUTOCAD DELIVERABLE

PLAN VIEW OF AUTOCAD DELIVERABLEPLAN VIEW OF AUTOCAD DELIVERABLE

Mine SiteAerial Photo of Site Before Construction

Mine SiteAerial Photo of Site Before Construction

Mine Site – DTM of Site Before Construction CreatedFrom Point Cloud Data

Mine Site – DTM of Site Before Construction CreatedFrom Point Cloud Data

Mine Site - DTM of Site After ConstructionMine Site - DTM of Site After Construction

Thank You!Thank You!Thank You!Thank You!Any Questions?Any Questions?