SU136408A1 - Support for bridges with prefabricated spans - Google Patents

Description

The known support structure for bridges with prefabricated span structures, on the upper part of which are fan-shaped monolithically joined with it springs, which are interconnected by puffs. The submersible elements provide the required number of points on the bridge span.

In the proposed support, in order to facilitate the construction of its erection, the most gentle spring elements are made composite. There are hinges between the components that provide central force transmission. KpOAie addition, such a constructive solution allows flooding of the bottom of the spring elements (pylons) rigidly embedded in the support array.

The drawing shows the proposed support for bridges with prefabricated spans.

The support consists of remote p t /, extreme spring elements (pylons) 2, zatchek 3 and 4, extreme spring elements (pylons) 5.

On the prepared foundation, which can be performed on the piled shells, on the lowering wells, in the form of a low pile grillage or in open pits, are installed in the prefabricated wells of the support cushion (pylons) and two medium submersible elements (pylons) ) 2. These elements are rigidly sealed before mounting the support as a whole or even after that. In the latter case, the remote console and the middle spring element (pylon) are temporarily wedged or pivotally working. The heads of the middle spring elements (pylons) are tightened by tightening 3 of high-strength wire bundles, and the extreme spring elements (pylons) 5 are pivotally mounted on the remote pits and the four 4 are fixed in the desired POSITION1. A puff - / is freely passed (for the convenience of adjusting it for tightening by pulling) through special windows in the heads of the middle and lateral elements of the substructure (pylons). Of practical importance, temperature effects, shrinkage of concrete, creep or subsidence of supports are, however, less reliance on fixing the tacks in the heads of the spring elements (pylons) allows, in case of need for work, as well as during operation, production of their position and operation x in their effort. This gives system a, it has significant advantages over other systems of modular bridges.

Subject invention

The support for bridges with prefabricated spans, on the upper part of which are fan-shaped are monolithically joined with it springs, joined together by puffs, differs from the fact that, in order to facilitate the production of work on its construction, the most gentle spring elements are made Composite in length with a hinge meladu them, providing central transmission of force.