Changes of the ecological state of the geological environment of the urbanized territory from the influence of the technogenic geophysical field of Syktyvkar
The study is based on the data of vibroseis survey in the urbanized area of Syktyvkar. Areas of above-norm velocity and acceleration vibration values zones intersection were determined. The vibrational impact consequences probability is high in the form of building base settlement up to 2 mm / year in weak and dense soils within such areas. The vibration acceleration maximum rms-root mean square values were recorded: for the component x - 0.254 m/s<sup>2</sup>, y - 0.207 m/s<sup>2</sup>, z - 0.622 m/s<sup>2</sup>; and vibration speed: for the component x - 1.195 ´ 10<sup>-3</sup> m/s, y - 7.54 ´ 10<sup>-3</sup> m/s, z - 1.318 ´ 10<sup>-3</sup> m/s. These values are repeatedly higher than the normative ones. 3 areas with a high vibration damping gradient were contoured on the displacement schemes. As a result, additions were itemized to the Syktyvkar seismic microzoning map from the geoecological city conditions viewpoint in terms of vibroseis load on buildings foundation soils. These conditions create an additional increment to the amplitude of possible earthquakes. We made conclusion about the ecological geological environment state transformation in the contoured zones in restrained urban conditions.