MONITORING OF ARCHITECTURAL MONUMENT CONTINUES

In the center of the city Odessa at the intersection of Deribasovskaya and Preobrazhenskaya streets there is an architectural monument of the XIX century - "Passage". Due to changing technogenic and natural factors, the "Passage" building was constantly undergoing minor deformations. However, since 2009 the intensity of deformation of the building has increased. To study deformation processes, geodesic monitoring was organized to study the draft of the building. To quantify the sediment of the Passage building, a method of high-precision geometric leveling with the beams of the second class program with a precision electronic level Dini 12 and a bar-code strip was used. Analysis of the results of observations served as the basis for an objective identification of the alleged causes of sediment. The main cause of the deformations was the local soaking of the soil of the base of the building as a result of water leakage from the damaged (spoiled) water-bearing communications that pass from Deribasovskaya street through the entrance to the "Passage". After the reconstruction of waterbearing communications, deformation processes ceased. This made it possible to give recommendations on eliminating these causes and ensuring the normal operation of the building in the future. During the reconstruction of the street Preobrazhenskaya in 2017, the road surface was lifted to a depth of 1-1.5 meter, and the work was carried out by heavy road machinery and jackhammers. At the same time, reinforced concrete was started to reinforce the foundations of the "Passage" interior, also with the use of jackhammers in conjunction with existing foundations. The appearance of new cracks is presumably a consequence of these vibrational processes. Recent observations of the sediments of the building, carried out in March 2018, found discrete subsidence of up to 12-30 mm for almost half a year. Simultaneously, the electronic total station Nivo measured the roll of the outer walls of the main facades of the building. Calculation of the rolls was carried out by the method of coordinates. Roll in the direction of. Preobrazhenskaya street reaches 311 mm.