Confined space Terrestrial Laser Scanning of sub-terranean pump wells for engineering design of remediation and upgrades
A pumping station which supplied the bulk of drinking water to one of Australia’s capitol cities required remediation and upgrade of a number of pumps. The pumps were each housed in a subterranean well which extended several storeys below ground.
Engineers responsible for the design of a pump replacement and upgrade project were lacking accurate as-built information as to the geometry of the wells, access routes and the plant and equipment contained therein. An additional constraint to the project was that access to the well was only possible for a 24-hour period of availability as the pumps need to be shutdown and the well de-watered to provide access.
Diodrone was engaged to provide a detailed reality capture of the three pump wells and the plant therein.
Confined space trained personnel utilised a tripod mounted terrestrial laser scanner to capture the bulk of the pump well areas, and then used a handheld SLAM based scanner to pick up areas of detail behind pipework and in constricted spaces where the tripod system was unable to access.
Tripod mounted laser scanning achieved high precision capture for the bulk of the areas and was complimented with handheld SLAM scanning of tightly constricted areas around plant and pipework.
The resulting point cloud included detail for almost all surfaces within the pump wells and provided engineers with a detailed and accurate as-built model from which to plan and design the upgrade works.