SUBSTANTIATION OF THE CHOICE OF A RATIONAL ORGANIZATIONAL AND TECHNOLOGICAL DECISION FOR THE CONSTRUCTION OF THE UNDERGROUND PART OF HIGH-RISE BUILDINGS WHEN USING THE “UP−DOWN” METHOD

Abstract

Problem statement. There is a noticeable tendency to increase the number of storeys of buildings and constructions with the development of urbanisation and growing demand for urban development. Analysis of the number of residential and public buildings damaged due to hostilities in Ukraine shows the prospects of restoring the large settlements by rebuilding the high-rise buildings, increasing the total number of storeys, and forming the infrastructure complexes of a new generation. Limited time and planned investments increase involving international finance institutions caused the problem with the effective evaluation of methods for constructing high-rise buildings, considering extremely short deadlines on the major construction and installation work. Purpose of the article – is to develop a method of choice of a rational organisational and technological decision for constructing the underground parts of high-rise buildings, which is based on an analysis of the factor of construction work complexity, considering the “up−down” method and the experts' evaluation method. Conclusion. The choice of the reasonable organisational and technological decision regarding the construction of high-rise buildings' underground parts considering the “up−down” method was justified. The factors that impact the complexity of construction work in the construction of underground parts of high-rise buildings were revealed. It was determined that for the construction of the pit in the construction of the underground part of high-rise buildings, which have deep foundations and a multi-storey system of deep floors, with the “up−down” method application, the use of the semi-closed method is reasonable. To make a justified decision on the choice of rational option for constructing the pit in the construction of the underground part of high-rise buildings by the “up−down” method for each case of changing the initial project data, performing the analysis according to the proposed method was recommended.