Hazards, vulnerability and interactions at construction sites: spatial risk mapping

Construction sites contain several supporting facilities that are required to perform construction activities. These facilities may be exposed to several hazards. This may lead to adverse consequences for the whole construction process, which in turn lead to fatal accidents that have a major impact on worker and employee productivity, project completion time, project quality and project budget. This paper proposes a framework to visualize spatial variability of a construction site's risk, generated by natural or technological hazard, through using hazard and vulnerability interaction matrices, between potential sources and potential surrounding targets. The proposed framework depends on using analytical hierarchy process (AHP), the potential global impact of facilities obtained from the interaction matrices, and the capabilities of GIS to generate results in the mapping form. The methodology is implemented in a real case project. The results show the capability of framework to visualize construction site risks due to natural or technological hazard, and also identify the most at risk position within a construction site.