The production and warehouse complex for 1460 sq. m, Kyiv, completed in August 2024
A production and warehouse complex constructed in the 1960–1980s is built in the industrial sector of Kyiv. The structural scheme of the production and warehouse block is frame-based, and the administrative block is frameless with longitudinal and transverse load-bearing walls.
Foundations of the warehouse block: columns, based on the manufacturing method – prefabricated.
Foundations of the administrative block: continuous, prefabricated reinforced concrete made from FBS foundation blocks.
Floor: cast-in-place reinforced concrete slab on 1,800–2,800 mm soil.
Columns: prefabricated, reinforced concrete.
Internal walls and partitions: brick.
External walls: hinged reinforced concrete panels, brick.
Flooring: prefabricated reinforced concrete ribbed slabs.
The site was audited and inspected in February 2024. A significant number of cracks in the reinforced concrete floor slab, uneven subsidence of the floor slab up to -60 mm, and, in some places, up to -180 mm against the designed position were detected and recorded.
The dynamic sounding method was used to examine the base (soil) of the floor slab directly in the cracked areas. A geodetic survey of the floor slab was carried out. Based on the examination and survey results, a technical report with conclusions and recommendations was prepared.
Based on the data from the Technical Report and geodetic survey, a design and technical solution was developed, namely:
– stabilization and strengthening of the base (soil) of the reinforced concrete floor slab to a depth of up to -2.5 m from the top of the floor slab by injecting gel-based composite solutions based on cement mixtures and liquid glass – INJECT technology. The total volume of the soil layer for strengthening is 3750 cub. m.
According to the project, the work lasted 30 calendar days while not limiting the operation of production and warehouse premises and sites. After that, geodetic surveying (levelling) of the floor slab was carried out within 20 days of the work’s completion. A Technical Report with an executive elevation diagram of the actual floor slab position was prepared. It is required to comply with the warranty obligations, which include a 10-year guarantee against the subsidence of the floor slab and the development or formation of cracks and defects.
