UDC 528.482
CSCSTI 36.16
During construction of an object, the foundation slab is subject to deformations from the moment the structures are erected. Depending on the loading stages, the foundation soils, the weight ofthe structures, deformations can be on the foundation slab, on the supporting vertical structures, and also on the roof covering structures. Geodetic observation methods allow detecting deformations at an early stage of their development, which helps prevent catastrophic collapses. During new construction, the load from the weight of the object is distributed on the foundation slab. The construction of structures occurs gradually, in sections, thus causing uneven deformation of the foundation slab depending on the structures being installed. These deformations subsequently affect other structures: columns, floors, roofing. The accuracy of geodetic observations of technically complex objects is determined individually, at the stage of developing design documentation. The presented work monitors deformactions of the foundation slab and roof covering of the construction object. Based on the materials of geodetic observations, geometric leveling was used to model class IC geometric leveling. The technical characteristics of the leveling runs and the difference in the elevation marks of the deformation marks are considered, allowing us to assess the quality of field measurements. According to the results of leveling lines adjustment, the misalignments of the lines are within the permissible limits of class I accuracy. The obtained difference in the height marks of deformation marks up to 1 mm is an indicator ofthe quality of class I leveling. The use of an improved observation method is permissible if the accuracy characteristics of class I leveling are observed and work is performed with short arms up to 15 meters.
geometric leveling, deformation monitoring, geodetic observations, accuracy class I
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