BRIDGE SPAN WITH MULTI-DIAGONAL MAIN TRUSSES Russian patent published in 2012 - IPC E01D11/00 

FIELD: construction.

SUBSTANCE: bridge span with multi-diagonal trusses comprises at least two multi-diagonal main trusses with a cross lattice, each element of which is arranged from one or more strips of rectangular cross section, installed with their wide sides in vertical planes, parallel to the common plane of the truss so that in units strips of one element are arranged between strips of other elements and are fixed by bolts and pins directly, without gussets, at least two cross links connecting multi-diagonal main trusses with a cross lattice at least in two places, bearing elements of the bridge floor arranged at the level of the span top and resting against upper belts of multi-diagonal main trusses with a cross lattice along their length, all elements of multi-diagonal main trusses with a cross lattice and cross links are made of composite materials, and bearing structures of the bridge floor additionally rest against cross links and are joined with upper belts of multi-diagonal main trusses with a cross lattice and cross links with the help of metal parts into a whole. At the same time cross links are arranged either in the form of multi-diagonal trusses with a cross lattice or in the form of trusses with a triangular lattice, or in the form of membranes, or in the form of their combination, and bearing structures of the bridge floor are arranged either in the form of longitudinally arranged ribbed panels from a composite material or in the form of longitudinally arranged panels of a laminated timber slab, or in the form of a solid reinforced concrete slab, or from prefabricated reinforced concrete boards combined in joints as a whole, and the composite material is a wooden flaky plastic. Besides, if a composite material is glass plastic, such as sandwich panels of element-by-element assembly, at the same time strips making rectilinear sections of elements of multi-diagonal main trusses with a cross lattice and elements of cross links do not have joints, or a wooden flaky plastic, or a bakelite plywood.

EFFECT: increased operational reliability.

9 cl, 2 dwg