Abstract
The work presents results obtained performing a survey campaign specifically designed to formulate an effective restoration project in a critical context. Within the remarkable project, promoted and financed by the Italian Presidency of the Council of the Ministers, and the Italian Ministry of Defence, for designing the conservative restoration plan of the Military Shrine in Cima Grappa (Italy), the assessment of the overall tunnels’ stability and a report of the state of conservation of the underground area has been produced. Exploiting the most advanced laser scanning survey technique, and some specific algorithms for point cloud analysis, several outputs have been generated, in particular a detailed geometrical 3D reconstructions of man-made and natural tunnels coating materials, geo-mechanical survey of rock mass, map of rock collapses and cinematic analysis of instability processes. The integration of Laser Scanning technique with the most commonly used Scan-line survey for rock-mass characterization and architectural surveys, allowed to perform advances analysis even in a high-risk study area as the one considered in the restoration project, which is represented by a predominant subterranean development. Most of the tunnels and underground spaces, displayed rock collapses and diffuse active instability processes that certainly could have drastically slowed down surveys and analysis. The adopted techniques allowed to rapidly proceed in acquiring data end to deliver sound outputs. This paper aims to report both a general description of the project, spending some words on the historical value of the place and describing the complex environment of work, and a detailed depiction of the performed survey activities with particular attention in showing laser scanning survey and the obtained results.
Highlights
In order to obtain the mechanical properties of the rock mass a geo-mechanical survey (Priest, 1993; Priest, & Hudson, 1976) of the calcareous rock mass surfacing in the infirmary rooms, dug under the Cima Grappa, near the Milan barracks, was carried out
Point clouds obtained from the high-resolution laser scanning survey, which has been carried out in the underground area, former infirmary, have been exploited to create a detailed 3D model of the area and to integrate traditional geo-mechanical survey with information automatically extracted from the point clouds
The results of the geo-mechanical analysis of the rock mass obtained were used to perform a 3D kinematic analysis aimed at assessing the propensity to failure for the various plausible breaking mechanisms in the tunnel sectors analysed
Summary
Some authors reveal that the politization of the fallen could be the true objective of the monumental ossuaries that Fascist Leadership built after the first world war (Malone, 2017).In addition to its historical value and the noticeable cultural and architectural heritage, sometimes old witnesses, even when the told story concerns war, suffering, death and poverty, need to be remembered, if only to prevent certain events from happening again.it undisputed how the project of conservative restoration of the Cima Grappa Military Shrine and of the revival of the annexed buildings, of the former NATO base and of the related neighbouring areas, assumes extraordinary importance for the complexity and heterogeneity of the envisaged interventions, and for the historical and programmatic legislative framework of which the Cima Grappa complex is a central and strategic part.Promoted and financed by the Italian Presidency of the Council of the Ministers, and the Italian Ministry of Defence, the restoration project insists on a mountain area on the top of Monte Grappa ( called "Cima del Grappa"), in particular the municipal area of Crespano del Grappa, Borso del Grappa and Paderno del Grappa in the Province of Treviso, Cismon del Grappa in the Province of Vicenza and Seren del Grappa in the Province of Belluno, in the geographic area of the Venetian Prealps. In addition to its historical value and the noticeable cultural and architectural heritage, sometimes old witnesses, even when the told story concerns war, suffering, death and poverty, need to be remembered, if only to prevent certain events from happening again. It undisputed how the project of conservative restoration of the Cima Grappa Military Shrine and of the revival of the annexed buildings, of the former NATO base and of the related neighbouring areas, assumes extraordinary importance for the complexity and heterogeneity of the envisaged interventions, and for the historical and programmatic legislative framework of which the Cima Grappa complex is a central and strategic part. Other than serving as linking path to access the other areas of the site, the ex-infirmary is one of the main highlights, an "archaeological" path of war in the mountain heart
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