SITE-CAST ELEMENTS INSPECTION
CHECKTOBUILD & ACERTA STORY OF SUCCESS
Time to take
From when the manager went to site to take the point cloud until available results
Estimated cost savings of rework to correct every stair of the project in case all were deviated. $730 per element
Estimated productivity upgrade after subtract spent hours on the same inspection with traditional methods
About the project
Location: Madrid, Spain.
Industry: Office building
Work phase: Above Ground – Structure
Data capture method: iPad Pro (Sitescape)
Size: 232737.27 ft2
Project value: $16.5M
Errors when pouring concrete in the structural phase of a project can represent high rework costs that can be prevented with the use of technological tools. Reviewing the correct construction of formwork can reduce the risk percentage of the project.
Operation process & scope
To ensure that the element’s concrete was poured correctly, the site manager inspected the ground floor of the side to:
1. Test the quality of the point cloud that contains the concrete formwork before pour-in-place.
2. Upload models (BIM & POINT CLOUD) to execute the inspection on-site.
3. After having results, vary the displacement of the model from solid to wireframe and activate the heat map on the point cloud to highlight the deviated areas.
4. Share the inspection to the involved stakeholders to determine how to proceed.
1st INSPECTION RESULTS
At the moment of the operation the element’s concrete wasn’t completely poured. Thus, the system was able to confirm the formwork alignment on the constructed element and the remaining part to pour.
- The system has made a very good comparison of the stairs in formwork, without having finished pouring all the concrete. Actually, it is evident that the edges of the steps are detected as being part of the formwork and not the model, but the already poured concrete is perfectly flat.
- Something similar happens around the side corners of the stairs, where we can observe that the biggest difference between the point cloud and model is in the protruding formwork elements, nevertheless the percentage estimated to be inside of tolerance (which we call “Similarity Percentage”) is of around 97%.
2nd INSPECTION RESULTS
C2B Platform aligned, self-corrected and cleaned the as-built model to automatically provide results 34h faster than the traditional methods. The second section of the stair has a higher inclination than that of the model. Its most distant area would represent an extra cost of 40.28ft3 of concrete. The element has 61% of similarity (points inside our tolerance values) with the projected element in the model.
Throughout both inspections the ACERTA’s team proved that CHECKTOBUILD’s C2B Platform definitely offers results with the same accuracy level as other traditional “reality capture” techniques with the advantage of reduced time to obtain results and take decisions.
Since in the two inspections of similar elements, the use of formwork was necessary, it was concluded that in the case of the second inspection, when the operation was carried out after the pouring, deviations were incurred in the concrete that could have been corrected in advance. As verified in the first inspection case; where the inspection was carried out on the formwork and only 70% of the concrete had been poured, That, allowed the team to verify the correct alignment of the formwork to the model.
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STRUCTURAL ELEMENTS LEVELING INSPECTION
Correct leveling of elements in the construction process requires many hours of work by highly qualified personnel, representing a high cost of multiple revisions, before and after finding any deviation.
PREFABRICATED CURTAIN WALL INSTALLMENT
When using prefabricated modules for construction the Innovative building designs may represent cost overruns if the prefabricated modules are not correctly placed.
WATER PIPES INSTALLATION INSPECTION
Pipe installation requires a post review to verify proper placement. To guarantee the precise level of these elements, will represent the fluid performance of the entire aqueduct and sewage system.