As part of the design and build of a new public building for our client, large excavations were required to facilitate the enabling works phase of the project. To allow the project to progress on programme, earthworks and materials stockpiles needed to be managed to ensure a balance between excavated material stockpiles and raw materials entering site.
To provide a true representation of the stockpiles on site and measured outputs of stockpile volumes, Waldeck used a combination of terrestrial laser scanning, Global Navigation Satellite System (GNSS) and Unmanned Aerial Vehicles (UAVs) to capture the site. By combining the aerial data and GNSS data to produce a point cloud positioned on Ordnance Survey National Grid, Waldeck was able to measure each stockpile volume accurately. With each flight taking 10 minutes and processing of a point cloud being completed in a matter of hours, the Client was able to quickly receive accurate volume measurements to inform site progress and project cost control.
The biggest challenge faced on this project was working on a site tight for space and around cranes. With a busy programme there were frequent visits to site where cranes were actively present. This required careful coordination between the Waldeck Digital Capture Team, Site Team and Crane operator to ensure that cranes were able to be lowered and static during all flights. With flights times being a maximum of 10 minutes, we worked to mitigate disruption and any loss in overall productivity to ensure flying caused no disruption to the days tasks.
Regular flights at key intervals in the project programme with all data sets coordinated to Ordnance Survey National Grid has aloud for earthworks and materials stockpiles to be tracked and comparisons made between volumes over the project duration.
As well as capturing the volume of stockpiles on the site, images captured with the UAV also provided a point cloud of the rest of the site, with each visit providing a snapshot of the live progress on site. This provided the Client with a number of benefits which included; establishing if the overall project was hitting programme, being able to better plan site movements and prevent accidents by spotting any potential hazards.