Research and comprarative analysis of constructions and specifics of work cranes for the installation spans of the bridge structures

Abstract

For the building of transport infrastructure objects, in particular bridge structures, various means of constructions mechanization are used, the most popular of which are cranes of various design and purpose. To speed up the installation of prefabricated spans, portal cranes are used, allowing ready-made beams to be install in the design position. Unfortunately, such cranes are extremely poorly represented on the Russian market, therefore it is necessary to research of design and operating features of existing models of portal cranes. For comparative analysis, systems were used whose main beams were lattice trusses and box-shaped steel beams, working in conjunction with hydraulic drives. Research was carried out to study various types of portal cranes, and dependence of position of the load on the work of portal cranes was studied. The main indicators considered were: the length, width, and height of the main beams of portal cranes, the speed of movement of the trolley, the maximum lifting capacity, the weight cranes, as well the types of structures of portal cranes. The luck of sufficient data on various systems of portal cranes and the methodology for their calculation and design on the territory of the Russian Federation provides sufficient grounds for conducting research and collecting the necessary data.