APPLICATION OF UNTYPICAL DESIGN SOLUTIONS AND SCHEMES IN THE CONSTRUCTION OF TEMPORARY BRIDGES

Purpose. The purpose of the study is a detailed analysis of the features of project solutions and construction processes of temporary bridge crossings. Special attention is paid to the implementation of non-typical structural and technological solutions that can significantly improve the efficiency of project implementation. Emphasis is placed on the use of combinations of stock constructions of "IMY-60" support superstructures and welded wide-span I-beams of the MA type (Lр=18.53 m) made of 15KHSND steel. Methodology. Research and analysis of practical structural and technological solutions related to the construction and restoration of bridge crossings using temporary bridges. Study and generalization of practical experience of implemented technological solutions in the construction and reconstruction of bridges, analysis of the impact of the consequences of hostilities and modern military conflicts on the state of transport infrastructure, as well as determination of optimal methods for restoring bridges. Findings. The result of the study was a generalization of the experience of constructive project solutions in the construction (restoration) of temporary bridge crossings in the de-occupied territories. Revealed and clarified the key stages of the implementation of design and technological solutions for the construction of a bridge crossing with a temporary bridge damaged as a result of hostilities, using steel inventory bridge structures. Originality. For the first time, the peculiarities of design and construction solutions with a rational combination of various materials and structures during the construction of temporary bridges, which ensures a long period of their operation and increases the static load, are considered. Practical value. Conducting works and constructive-technological solutions during the construction of temporary bridges has a number of technological advantages, which ensure the effective restoration of bridges destroyed by hostilities in a short period of time. The article covers the study of the use of the most effective, cost-effective, and easy-to-implement inventory structures of superstructures of IMY-60 supports and welded wide-span I-beams of the MA type (Lр=18.53 m) made of 15KHSND steel, with the maximum use of already existing bridge structures, depending on construction conditions, soil type and design requirements for foundations.