When Conventional Field Surveys Are Not Feasible
It is no secret that slopes fail. Whether it is along a roadway, overtop a pipeline, on the side of a well pad, or, in this case study, adjacent to a water intake structure along a river, slopes fail and need to be stabilized. The geotechnical engineering process to remediate these slips and slides often starts an existing-condition topographic survey. These surveys will typically include a field survey of the affected area followed by a CAD drawing deliverable that contains the existing contours, spot elevations, affected structures, and cross-sections, so the engineer can analyze the slope and determine the best method to fix it and prevent future slips, in a cost-effective and safe manner.
At times, conventional field surveys of these unstable slopes are not safe or simply inaccessible due to site conditions. In this case study, we examine how Eye-bot Aerial Solutions deployed their advanced data acquisition technologies to prepare an existing-condition topographic and location survey CAD deliverable with survey-grade accuracy of a failed embankment that had these exact characteristics (unsafe, inaccessible).
High-Resolution UAS Data Collection Experience
Eye-bot was contracted to provide the geotechnical engineers of an industry-leading oil and gas client with an existing-condition topographic and location survey along a failed embankment adjacent to, and either side of, their river Water Intake structure. Primarily due to weather, erosion, and lack of vegetation, parts of the slopes had washed down, slipped, and failed to beyond vertical, potentially threatening the integrity of the concrete foundations of the intake structure. Access to the areas of
interest on parts of the slope to perform a conventional survey conventionally were not only unsafe, but impossible without costly man-lifts, ropes, and time.
Starting with a proper photogrammetric control survey and setting Ground Control Point targets (GCP’s) and measuring a series of check points (CP’s) on easily accessible hard surfaces, Eye-bot deployed its years of high-resolution UAS data collection experience to photogrammetrically capture the affected areas of the embankments in about a half a day!
One Data Set Enables Accurate Decisions
Saving Time, Reducing Risk
Join our free webinar to learn more about the Advantages of Drone Photogrammetry Over Conventional Surveying From Eye-bot Aerial Solutions.
- Eye-bot photogrammetrically captured the affected areas of the embankments in half a day.
- ContextCapture was leveraged to create a high-resolution 3D Reality Model.
The CAD team used MicroStation to deliver a CAD drawing with contours.
Not only did Virtuosity provide support for this specific project, but they helped our CAD team to integrate a seamless workflow that will become the standard for how we extract features, build surfaces, and deliver contours from a 3D reality mesh."
Eye-bot Aerial Solutions
3D Mesh Model Deliverable
3D CAD Deliverables