Location: Medieval City Walls, Pisa, Italy
- 3D Point Cloud (Intensity map and grey scale)
- 2D AUTOCAD drawings, scale 1:20
- Orthophoto, scale 1:20
- REVIT 3D Model
The laser scanning survey was conducted for the restoration and recovery plan of the mediaeval city walls of Pisa, specifically in the tract between Bastion Stampace and Lungarno Sonnino. The post-production data resulted in 2D graphic designs at a scale of 1:20, detailing the representation of each stone, alongside a 3D model for the interpretation of mechanical instability.
The Challenge of Surveying the Damage:
A significant crack traversing both sides of the mediaeval city walls in Pisa, Italy, posed a threat to the stability of this monumental historic defensive structure. To address this challenge, accurate dimensional information was imperative to detect and monitor the structural failure and its potential domino effect on other connected structural elements.
Given the state of degradation and dense vegetation surrounding this portion of the city walls, accessing the top was impractical. Our chosen survey methodology, tailored for remote and non-intrusive reality capture, involved the use of laser scanning. The millimetric accuracy provided by the on-site scan data became a reliable foundation for producing high-resolution and rectified photo collages.
The most critical deliverable for this project was the production of Orthophotos at a scale of 1:20. Each stone was meticulously displayed in high resolution and drawn in CAD to define accurate stonework. Cross-referencing laser scanning data with High-Resolution Orthophotos allowed for the identification of irregularities in the wall texture, including cracks and their consistency, orientation, and direction.
This approach also facilitated the assessment of the state of conservation of mortar between stones, mapping potential losses, and identifying other forms of decay and damage in that portion of the city walls.
A textured Revit 3D Model was also created for the analysis of mechanical instability and the evaluation of structural consolidation. This comprehensive surveying approach not only addressed the immediate structural concerns but also laid the groundwork for a meticulous restoration plan for the mediaeval city walls of Pisa.
WHO WE WORK WITH
ARCHITECTS & DESIGNERS
Point clouds/ DWG / Revit
Pre-construction / as-built surveys and Virtual Design and Construction
Quality control during construction