MULTI-SPAN ANTI-JAM BRIDGE CROSSING Russian patent published in 2019 - IPC E01D19/14 E02B3/06 

FIELD: construction.

SUBSTANCE: multi-span anti-jam bridge crossing is related to the field of nature protection and water-economic construction and can be used at creation of passages (bridges of frame structure, pedestrian bridges, aqueducts, viaducts, seaports etc.) through mountain and submountain rivers, characterized by flood mode of flow of water-drift flow with floating tufts, logs, freshly conserved trees with branched crowns, etc. Multi-span anti-jam bridge crossing includes interfloor supports embedded into the base of the mountain (foothill) river, on the upper part of which at the height exceeding the maximum flood level of the river, the overlying overlapping of the bridge crossing rests, and on the upper side are adjoined to them buried in the base vertical longitudinal walls, protruding upward along the river bed by a value not less than the maximum depth of the river, wherein vertical longitudinal walls are made with height of upper and middle parts, respectively, not less than maximum flood level of river. There is also provision for antifashing attachment between vertical longitudinal walls, as well as making vertical longitudinal walls with different lengths and their upper end walls inclined towards the lower river flow.

EFFECT: design of multi-span anti-jam bridge crossing on mountain and submountain rivers allows improving its operation reliability by reducing risk of jamming at bridge crossings.

3 cl, 2 dwg