Stiffening elements for a lattice girder of the stretching - and tunnel works, taking into account the special requirements, caused by means of the welded connections

摘要

The beam is constructed from three parallel bars, which are arranged as the vertices of a triangle. The bars are fastened to one another by welded bracing, which also fulfils a separating function. The bracing is paired into V-shaped arrangements which are linked into a crib. Both limbs of an arrangement are bent with a curve (T2), and the ends of the limbs are connected to one another with a curve (T1). One curve (T2) of the bracing is bent over a bar (1), and the other curve (T1) lies alongside the outside of a bar (2). The latter is also bent out of the plane connecting the two bars, at least as far as a vertical construction plane, in order to increase the area of the joint.