Uav Photogrammetry for Resilience Management in Reconstruction Plan of Urban Historical Centres After Seismic Events. A Case Study

Abstract

In the last decades, the UAV photogrammetry has been widely employed to obtain a complete and metric survey in different fields, especially when high resolution, speed of execution and safety are required. It is widely used in the construction sector and an interesting research field is their use to support the historical centres urban renewal projects, especially in post-earthquake reconstruction. In fact, the establishment of a construction site involves several intrinsic criticalities linked to the nature of the context, and especially in a post-earthquake scenario, additional problems arise beyond these critical elements. These conditions affect the preservation of historical centres, planned conservation, risk and resilience management. For this reason, it is necessary to develop innovative methodologies and strategy to plan interventions and to manage the construction sites in the historical centre after an earthquake. The use of UAV photogrammetry is a tool to support this activity in this field because it allows obtaining a complete and a highresolution geometric survey of the areas to be reconstructed in a fast way and especially in total safety for the operators. For this reason, this study aims to illustrate a methodology that, starting from a series of preliminary surveys, supports the development of the program of reconstruction of a historic urban centre hit by an earthquake event. The aim of this research is to prevent problems, interferences and criticalities in order to increase the safety and rationality of the entire reconstruction process.

The use of unmanned aerial vehicles (UAVs) for engineering geology applications

“…peculiarities and dimensions, sometimes limited, of the spaces available inside and outside the building, usable for its rational organization; difficulty in storing, traveling distances, both for the evacuation of waste materials, the access to supply materials, and the movement of people, materials and vehicles; obstruction and dimensional impediment caused by adjacent buildings; presence of neighboring building sites; presence of users and activities both in the building to be recovered and in the immediate vicinity; quality and complex interdependence of the various operational phases; the crucial importance of temporary works, safety, and service (Alicandro et al 2019).…”

Hbim for the Seismic Vulnerability Assessment Of Traditional Bell Towers

“…Quite often, the acquisition point is placed on the ground and/or very close to the tower, so it could be very difficult to survey higher parts, because of the distance and the projections. In such a case, the use of UAV (Unmanned Aerial Vehicle) is a valid method for the low-cost data acquisition of vertical structures, complex or difficult to access architectures (Alicandro, Rotilio, 2019;Parrinello et al, 2019;Jo, Hong, 2019). During the interior survey, other issues arise: quite often the staircases are too dark and barely artificially illuminated; in addition, the narrow space makes really complicated to get the right overlap of images.…”

Safety Monitoring by Means of Sensor Networks Distributed Within the Fossa Site Plan

“…In this document, we have focused on the part of the study that concerns the automation aspect of the safety verification process. Building Information Modelling, geografic information system, augmented reality, UAV photogrammetry are some of the new paradigms in the construction industry [8][9][10][11][12]. Currently there are dynamic platforms connected to sensors (probes, detectors) and Personal Protection Equipment (PPE) through smart equipment designed for the purpose with innovative technologies.…”