A View to a Vug: Optical and Acoustic Televiewers
Watch this five-minute episode highlighting Televiewers
Click here to follow along as Agent Delta learns how to get the most out of her subsurface exploration program with optical and acoustic televiewers.
 A-GaME Webinar #8 focuses on optical and acoustic televiewers
A-GaME Webinar 8: A Look Down the Hole: Optical and Acoustic Televiewers
FHWA A-GaME webinars feature proven, effective exploration methods and practices for enhanced, effective site characterization that reduce project risks, improve quality and accelerate project delivery.
Highlights of Webinar 8:
- The what, why and how of televiewers – A 360°, high-resolution view of the underground!
- The difference between optical and acoustic methods
- The types of rock formations where televiewers really shine
- Bonus features: digital caliper logs, strike and dip plots
- Case history of the value of televiewers from Mosul, Iraq
- State DOT applications
Panelists:
Moderator: Benjamin Rivers, FHWA Resource Center
Speaker: Rob Garfield, Hager Richter Geosciences
Speaker: Georgette Hlepas, U.S. Army Corps of Engineers
Speaker: Gabriel Taylor, Washington State DOT
Speaker: Nicholas Farny, FHWA - Western Federal Lands Highway Division
Watch Now
Dr. Strangerock: How I Learned to Stop Worrying and Love the Televiewer
Televiewer data on east abutment at landslide in Denali National Park
The final presentation in Webinar #8 — A Look Down the Hole: Optical and Acoustic Televiewers — is a terrific look at modeling anisotropic rock masses with televiewer data at the Pretty Rocks landslide in Denali National Park. Or, as Nicholas Farny, engineering geologist for the FHWA-Western Federal Lands Highway Division calls his presentation, “Dr. Strangerock: How I Learned to Stop Worrying and Love the Televiewer.”
A landslide about midway down the 90-mile road that runs through the park was moving at least 5 feet each month in the vicinity of a planned bridge abutment. The FHWA and Denali National Park worked together to determine the feasibility of the abutment at this location. The question was how to ensure global stability considering the loads that would be imparted on the slope as a result of the ongoing landslide. Optical and acoustic televiewers were used to collect in-situ discontinuity measurements of the rock. The televiewer data proved extremely useful in understanding the influences of discontinuities on global stability in the fractured rock.
WSDOT Uses Televiewers for Rock Cut Design
 Snoqualmie Pass, Washington
Another presentation in Webinar #8 — A Look Down the Hole: Optical and Acoustic Televiewers — focuses on Washington State DOT’s (WSDOT’s) use of televiewers for rock cut design on a multiphase project at the Snoqualmie Pass East on I-90. The pass is the main corridor across the Cascades, which divide the east and west sides of the state. In order to widen the road and straighten a specific curve, WSDOT needed to create a rock cut on a very steep slope with poor rock quality and difficult access. Gabriel Taylor, L.E.G, of WSDOT, discusses the use of televiewers to identify discontinuities that were critical to the rock cut design, and the importance of using multiple methods to correlate data.
A-GaME Summer Super Sessions Are Underway!
Summer Super Sessions are virtual workshops that dive deep into A-GaME topics with a focus on improving geotechnical site characterization practices for construction decisions and constructability, with panel discussions and Q&A opportunities that connect participants with the speakers. Our third session, “Bridge the Gap: Communicating Subsurface Conditions for Construction,” airs on Wednesday August 17, 11 a.m. ET.
Click Here to Learn More and Register!
Every Day Is A-GaME Day
Be sure to visit the new A-GaME webpage for the latest information and resources on A-GaME technologies for enhanced, effective site characterization that can help to save time, money and resources in transportation projects. There are A-GaME videos; links to bulletins with success stories and updates on news and events; and resources from the FHWA and our industry partners.
A-GaME Webinars
FHWA has partnered with Deep Foundations Institute (DFI) to host and distribute recordings of the 2020-2021 winter webinar series, featuring the FHWA A-GaME on its YouTube Channel.The webinars feature a variety of topics related to proven, effective exploration methods and practices for enhanced, effective site characterization that reduce project risks, improve quality and accelerate project delivery.
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