Numerical analysis and practical application of methods for strengthening foundations with piles during reconstruction process

Abstract

The article describes the reconstruction of the historical stone building basements. It provides a brief description of the constructive solution of the buildings under consideration and summarizes information about their technical condition. The article highlights the importance of analyzing information about the construction and operation of buildings during the entire history. This article lists the main tasks of the reconstruction of historical buildings: area augmentation due to the reconstruction of previously unexploited basements, deepening of basements, expansion of existing openings in the walls and construction of new ones, arrangement of new entrance nodes into the basements of a building, etc. Besides, the article gives a brief description of the soil conditions of the reconstructed buildings sites, which are typical for historical buildings in Tomsk. It points out the need for thorough engineering and geological examinations with additional geotechnical examination of the soil base. Additionally, the paper clarifies the necessity to examine the characteristics of supporting layer foundation soils, changed due to their compaction by the weight of the building during the period of long-term operation. The results obtained during the examination and assessment of the technical condition of foundations and overhead building structures will be presented. Also, this study proposes classification of methods for strengthening natural foundations (freestanding, strip, slab and massive) using piles. In particular, it talks about piles that are installed without soil extraction - displacement piles (pressed and injected), as well as examples of numerical modeling of the work of detached and strip foundations reinforced with the use of piles when the basement floor elevations are lowered. Finally, it shows he experience of scientific and technical support for the reconstruction of buildings.