ABSTRACT
This chapter presents the results of investigations on the condition of bases and foundations of residential buildings differing in service periods and storeys, to which additional floors were added. However, if the wooden piles always remain below the water level, their useful life can be 150–200 years; hence their presence in foundations need not prohibit additional superstructure construction or reconstruction of a building with increased loads. By and large the strength of the foundation materials of the buildings under reconstruction could be ascertained by visual inspection. But adoption of electrophysical and ultrasonic methods enables obtaining more reliable data. Thus the foundations of buildings built over the last 100 years or more possess reserve strengths which may be used while adding additional storeys and during reconstruction. Analysis of the technical recommendations concerning the condition of buildings and structures subjected to further storey construction or reconstruction with increased loading on foundation soils.
