Union Station, Toronto: Steel Reinforcement Cover Mapping
Union Station in Toronto required the removal of concrete in order to install new fare gates. As such there was a need to map the amount of cover on the steel reinforcement, along with the presence of any hidden conduits.
Xradar performed a survey utilising our industry leading concrete scanning technology. This survey allowed us to accurately map just how much concrete cover existed between the steel reinforcement, in addition to all electrical lines embedded within the project area.
This meant that the concrete could be removed safely without any damage to the reinforcement or electrical lines, saving time and preventing costly mistakes.
Xradar Pre-Design Survey for Coring
A contractor was engaged to core holes in a structure during the construction and development of a local structure. As with any time cutting or coring is required, it is essential to scan with Xradar prior to work commencing. This ensures that there is no damage to structures or anything hidden within the concrete. These errors are incredibly expensive and can delay projects for long periods of time.
An Xradar technician carried out a full pre-design survey on site, including producing a 3D model plan. This enabled the contractor to redesign their space to avoid damaging any existing electrical lines within the slab.
Xradar Concrete Scanning for Toronto High Rise
During the construction of a downtown Toronto High Rise, engineers needed to plan for the installation of an escalator, which involved cutting out a large portion of the structure. Over 4000 square feet of area required concrete imaging in order to ensure that no damage was sustained.
Utilizing our industry leading Xradar Enhanced Concrete Scanning Services, we were able to map all of the structural steel within the floors and walls, along with all of the electrical conduits travelling through the slabs. This included fire alarms, power and data conduits.
The results of the survey was then mapped using our specialist 3D camera, allowing engineers to explore the location remotely and make accurate and informed decisions.
You can read more details about this project HERE in our case studies.
Xradar used a high frequency GPR survey to achieve the required accuracy and a mid-range frequency GPR to reveal information about the structural details underpinning the area. Several grids with evenly spaced lines were laid out resulting an approximately 350 sqm of total coverage.
The Xradar systems used were carefully calibrated onsite to ensure accurate depth measurements. Data was processed and compiled to produce contoured heatmap style results. Results were presented in a CAD workspace and digital reports delivered.
The Xradar survey was complimented with Vuit 3D laser scanning to achieve accurate, scaled georeferencing of our survey grids, and a convenient way to view and present the asphalt thickness results.
The survey revealed a distinct change in the asphalt thickness due to the structural change to the subsurface that was confirmed with the survey results from the mid-range frequency GPR. The data uncovered not only the asphalt thickness but also the nature and location of the subsurface features such as: beams, voids and structural slab changes.