Reality Capture using Photogrammetry for Slope Stabilisation works

PROJECT OVERVIEW

As part of ongoing maintenance to the economic and culturally significant Great Ocean Road in Victoria, a number of geotechnical solutions have been, and continue to be, installed to protect road users from potential rock falls. Working closely with the client and the construction contractor, Diodrone was commissioned to provide detailed As Built surveys of 17 slope stabilisation sites.

PROJECT SCOPE

Drone Photogrammetry

High density georeferenced Point Cloud

As-Built Drawings derived from digital survey

DIODRONE SOLUTION

Over a 2 day period on site using a small multirotor drone equipped with a high resolution camera, Diodrone captured detailed photographic data for each of the sites in conjunction with a network of ground control points. The data was processed in photogrammetry software to develop high-density and georeferenced point clouds for each site. Then working within specialist software, Diodrone data technicians digitised the constructed features of each site, including rock fall netting, rock bolts, soil nails, retaining walls, road line markings, and guard rails. The digitised features, accurate in geolocation to better than 50mm RMSE, were then exported to drafting software where detailed As-Built drawings were prepared for each site.

Data capture was completed in an average of 1 hour, reducing personnel on site and disruption to road users.

Unlike conventional means of completing such works, the data capture for each site was completed in an average of 1 hour, reducing the exposure of site personnel to safety risks associated with roadside works and also reducing the disruption to road users passing by. With such a detailed reality capture completed, the survey and pick up of individual features was safely and efficiently conducted in a virtual environment away from site.