THE USE OF PIPE CONCRETE IN AN ARCHED BRIDGE CONSTRUCTION

Abstract

The experience of using tubular concrete structures in bridge construction is considered on the example of facilities built over the past 30 years in the People's Republic of China. The features of the construction of a bridge over the Xun River in Pingnan County, Guangxi Province, which currently has a record span of 575 m, are considered. An overview of outstanding facilities built using large-span lattice arches made of tubular concrete elements, working mainly on off-center compression, is performed. Various methods of mounting spans of steel-reinforced concrete arch bridges, advantages and disadvantages of each method are considered. The technology of concreting pipes is considered in detail. The designs and methods of construction of facilities using large-span arches of solid cross section with tightening for the construction of bridges with spans of 46 and 96 meters are considered. Modern research in the field of the work of bendable arches is considered in comparison with the model considering the work of a tubular concrete element as an out-of-center compressed column, which in the future can ensure more efficient use of material properties in design. The prospects of using tubular concrete structures for the construction of small bridges are indicated, which is especially important in areas remote from construction industry enterprises with an underdeveloped highway network.