Jun 04 2020
8:30 am - 10:00 am
SPAR – Surveying & Mapping – 3D for Infrastructure/Transportation Challenges
Track Name: Thursday 8:30 AM - 10:00 AM
Session Date: Jun 4 2020 8:30 am - 10:00 am
Caltrans Geotechnical Design Integration of UAS
Caltrans personnel investigating landslide and rockfall sites face unique challenges. They need to access the steep and potentially dangerous terrain in order to adequately map features and gather data to support design calculations, but they also need to proceed in a safe manner. Oftentimes, geo-professionals responding to slope failures do not have sufficient time or resources to charter aircraft or other specialty aerial mapping services to obtain the best design data. Inadequate reconnaissance information hinders planning for safe site access. A readily deployable, small, and cost-effective tool is needed in these instances. Deployable Product This abstract produce recommendations, guidelines, training materials, and procurement specifications for the application of small Unmanned Aerial Systems (UAS) in conducting geotechnical investigations in steep terrain. The UAS will integrate several remote sensing and data collection technologies, including high resolution aerial photography and terrain mapping capabilities. The primary application will be to support geotechnical field investigations involving landslides, rockfall, and other difficult slope access instances where staff safety is a concern. Other applications at Caltrans are envisioned and may be performed by other working groups, including bridge inspections, non-intrusive biological observation, and traffic management. Background/Context Documented interest within Caltrans of utilizing UAS's mounted with remote sensing instrumentation for slope investigations dates back to at least 1998. The idea was well received and moderately researched; however, at that time, the technology was raw and unrefined as well as being cost prohibitive. Today, advancements in technology have increased the functionality and decreased the cost of both UAS's and remote sensing instrumentation to a fraction of the cost compared to that of a decade ago. We envision a UAS for geotechnical applications will consist of a remote controlled, multi-rotor flying device with plug-and-play payload integration of remote sensing instrumentation. The UAS, with GPS integration, will have the capability to autonomously fly specific pre-planned flight paths. A camera mounted to the bottom of the UAS in combination with GPS will be used to capture georeferenced aerial photos. Professional photogrammetry software will be used to process the aerial photos and produce coordinate smart, ortho-mosaic photographs and 3D models. These products are necessary tools for responding to, characterizing, and planning mitigation of landslide and rockfall hazards.
The 3D Reality of Network Wide Roadway Management
Mobile LiDAR - The 3D Reality of Network Wide Roadway Management Maintaining state and local roadway systems face many challenges most of which ultimately revolve around fiscal budgets, project budges and other budgetary constraints. Mobile LiDAR allows for fast analysis of the surrounding roadways and associated infrastructure. This data can then be used for the lifecycle of the roadway network. This presentation will focus on the reality of how mobile LiDAR is playing a key role in the planning, design, construction and maintenance phases of the project life. Key points will cover: 1. Master Route Planning - GIS-based first step planning. 2. Roadway Condition Documentation - Mobile LiDAR point clouds, 360 imagery and georeferenced 360-degree videos. 3. Roadway Evaluation and Analysis - Utilizing collected data to determine roadway condition and any limitations such as utility crossing heights, obstructions, width restrictions, etc. 4. Base Mapping - Point cloud data used for roadway improvement design. 5. Pre-Construction, During Construction, and Post-Construction Documentation - Capturing conditions as they exist at critical times throughout the life of the project. 6. Additional Uses of Mobile LiDAR Data - Asset management, slide/slip monitoring, line of sight for Highway Occupancy Permitting, sign inventories, tree/brush trimming planning, pavement condition inspections, virtual flythrough, corridor modeling, and more. Stahl Sheaffer Engineering, a multi-discipline civil engineering firm with 9 locations in Pennsylvania, West Virginia, and Ohio, has been providing the natural gas Industry with roadway and infrastructure engineering services since 2010. Stahl Sheaffer has a fleet of mobile LiDAR and imaging units as well as traditional surveying and UAV/UAS services.
Stahl Sheaffer Engineering, LLC