ABSTRACT
Historic structures and monuments are of paramount value for human civilizations. Much of this heritage needs immediate restoration due to weathering, misuse and various forms of attacks. This paper tackles rehabilitation of a historic building in Egypt that lies near by the famous Giza Pyramids: Royal Rest House of King Farouk built in 1946. The two-storey building was designed as a wall-bearing structure with a neo-Pharaonic style. The building superstructure was endangered by various cracks that threaten its stability. This damage and its cause have been quantitatively and qualitatively analyzed and assessed in this investigation. The building cracks deemed to be initiated by partial differential settlement resulting from soil slope failure which produced rotational and translational movements of the building. Causes behind the slope failure were analyzed and verified in this study. Reverse engineering analysis was adopted to identify the soil properties due to the difficulty of obtaining actual data via bore holes in such a historic area. Slope stability analysis using geometric information obtained via Google Earth Pro was performed using Geo5 and nu-merical modelling using Midas GTS. Cracking of the superstructure was visually assessed with cracks width and depth being measured to categorize and map the building damage. The superstructure was also numeri-cally modelled using SAP after building a BIM using Revit to visualize the rest house in its desired final state. The superstructure numerical model was used to simulate the damaged state of the building and the stresses generated at the locations of grouting materials. Based on the results of the current investigation, rehabilitation and preservation techniques are proposed in form of reinforcing the substructure using stone columns and grouting the superstructure cracks to enhance the building stability and its load carrying capacity. The restoration proposal is verified using Midas GTS for the slop stability and by conducting a limited experimental investigation in order to verify the effectiveness and compatibility of the material chosen for cracks grouting.
