Current pillars
River pillars are built in a river bed . They are used for lifting from over the river leading bridges .
Stone bridges, e.g. B. the Pont Neuf in Paris , usually stand on several river pillars at a short distance. Stream pillars always represent an obstacle for shipping , are unfavorable in terms of water hydraulics and also require a comparatively high level of construction and maintenance.
Therefore, when constructing river bridges, the aim is to get by with as few as possible or completely without river piers. However, this leads to an increase in the overall height of the superstructure, which is often undesirable for design reasons.
River piers can be flat or deep Founded be. In the case of shallow foundations, special attention must be paid to the bed of the river in the area of the river pillars during structural inspections (for road bridges according to DIN 1076 ). In addition to the periodic structural inspections, the river pillars must also be checked after all floods or special events.
River pillars are often profiled to divert water pressure and reduce scouring , and are significantly larger than the actual pillar in order to act as ramming protection.