Preliminary Analysis of the supporting structures and their stability, Fracture Analysis compared to geological analysis, Supervision of geological and georadar investigation, Surveying with material restitution using photo insertion, Analysis of the foundation.
GENERAL INTENTIONS OF THE RESTORATION PROJECT
The restoration project was the result of a thorough investigation of the Complesso Canonico e della Pieve considered as a whole, including the historical development of its buildings, a careful analysis of deterioration, and the identification of structural instability. The general intention was to restore the Complesso Canonico according to "scientific restoration" principles, meaning by this, work which conserves the destination, appearance and structure of the buildings while enhancing their features and which uses methods suitable for their intrinsic characteristics. The overall intention was to restore the historical identity which had been lost in several sections of the complex, resolve the numerous issues related to the superfetations which disfigured the area, and consolidate weakened supporting structures. The final goal was to restore the area to its natural users, creating handicap accessibility wherever possible so that it once again became an assembling place for the parish community. Particular attention was given to studying the area at the back where the entrance to the cellar is and which had no trace of its historical origins, having pavements partly in packed earth and partly in cement. The project for the outdoor areas intended to emphasize the historical quality of the place by identifying the two original historically level areas of the complex: the one between the room outside and the apse of the Pieve (originally the entrance before the orientation was inverted) and the one at the entrance to the cellar. The two have been connected by a stairway in pietra serena. The renovation of this area was mainly based on two considerations: the creation of an "accessible" space at the back of the complex and definition of the space by the use of elements which identify its historical origins.
The restoration of the interior primarily regarded the restoration and sanitization of the basement rooms which were generally in unhealthy conditions due to the humidity which had penetrated the walls from the base and presented numerous superfetations which needed to be removed. The general intention was to restore the rooms conservatively besides creating a space accessible to the disabled through the access to the exterior and finding suitable ways to connect floors at different levels
SUPPORTING STRUCTURE CONSOLIDATION
The restoration project had to take into consideration many different aspects regarding the complicated situation of the geological, structural and architectural deterioration of the complex. Consolidation consisted of the following tasks: draining the water veins present in the area, eliminating water infiltration in the ground, increasing the strength of the foundations by widening the base standing on the earth, transferring load to a deeper layer, repairing of the largest lesions to reconstruct the lost structural solidity. These operations required both localized and more extensive repairs and resulted in the stabilization of ongoing movement to the point of re-establishing the correct structural performance of the building. The recovery of the load bearing capacity of the foundations was done in two ways: by widening the base of the foundation to distribute load over a wider area, and by transferring load to deeper layers using a specially designed system of micropiles.